阅读说明：本技术 高频模块和通信装置 (High-frequency module and communication device ) 是由 森弘嗣 于 2021-05-06 设计创作，主要内容包括：提供一种高频模块和通信装置。高频模块(1)具备：天线连接端子(100)和不同于天线连接端子(100)的天线连接端子(200)；以包含TDD用的第一通信频段的第一频带为通带的滤波器(11)；以包含TDD用的第二通信频段的第二频带为通带的滤波器(12)；以及以包含TDD用的第三通信频段的第三频带为通带的滤波器(21),其中,第三频带位于第一频带与第二频带之间,滤波器(11及12)均与天线连接端子(100及200)中的一方连接,且滤波器(21)与天线连接端子(100及200)中的另一方连接。(A high frequency module and a communication apparatus are provided. A high-frequency module (1) is provided with: an antenna connection terminal (100) and an antenna connection terminal (200) different from the antenna connection terminal (100); a filter (11) having a first band including a first communication band for TDD as a passband; a filter (12) having a second frequency band including a second communication band for TDD as a passband; and a filter (21) having a third frequency band including a third communication band for TDD as a passband, wherein the third frequency band is located between the first frequency band and the second frequency band, the filters (11 and 12) are both connected to one of the antenna connection terminals (100 and 200), and the filter (21) is connected to the other of the antenna connection terminals (100 and 200).)

1. A high-frequency module is provided with:

a first antenna connection terminal and a second antenna connection terminal different from the first antenna connection terminal;

a first filter having a first frequency band as a pass band, the first frequency band including a first communication band allocated as a communication band for a time division duplex system;

a second filter having a second frequency band as a pass band, the second frequency band including a second communication band allocated as a communication band for the time division duplex system; and

a third filter having a third frequency band as a pass band, the third frequency band including a third communication band allocated as a communication band for a time division duplex manner,

wherein at least a portion of the third frequency band is located between the first frequency band and the second frequency band,

the first filter and the second filter are both connected to one of the first antenna connection terminal and the second antenna connection terminal, and the third filter is connected to the other of the first antenna connection terminal and the second antenna connection terminal.

2. The high-frequency module as claimed in claim 1,

further comprising a first switch having a first common terminal, a second common terminal, a first selection terminal, and a second selection terminal, the first common terminal being exclusively connected to the first selection terminal or the second selection terminal, and the second common terminal being exclusively connected to the first selection terminal or the second selection terminal,

the first common terminal is connected to the one of the first antenna connection terminal and the second antenna connection terminal,

the second common terminal is connected to the other of the first antenna connection terminal and the second antenna connection terminal,

the first selection terminal is connected to the first filter and the second filter,

the second selection terminal is connected to the third filter,

the first filter and the second filter are both connected to one of the first antenna connection terminal and the second antenna connection terminal via the first selection terminal, and the third filter is connected to the other of the first antenna connection terminal and the second antenna connection terminal via the second selection terminal.

3. The high-frequency module as claimed in claim 1,

further comprising a fourth filter connected to the other of the first antenna connection terminal and the second antenna connection terminal and having a fourth frequency band including a fourth communication band as a passband,

the fourth frequency band is located on the lower frequency side or the higher frequency side than the first frequency band, the second frequency band, and the third frequency band.

4. The high-frequency module according to claim 1, further comprising:

a first antenna connected to the first antenna connection terminal; and

a second antenna different from the first antenna, connected to the second antenna connection terminal.

5. The high-frequency module as claimed in claim 1,

the first frequency band includes any one of 3300MHz-4200MHz and 3300MHz-3800MHz,

the second frequency band includes any of 5150MHz-5850MHz and 5150MHz-7125MHz,

the third frequency band comprises 4400MHz-5000MHz,

the first communications band is either n77 or n78 of 5G-NR,

the second communications band is WLAN or NR-U,

the third communication band is n79 or n78 of 5G-NR.

6. The high-frequency module according to claim 3, further comprising:

a fifth filter connected to the other of the first antenna connection terminal and the second antenna connection terminal, and having a fifth frequency band including a fifth communication band as a passband;

an amplifier capable of amplifying high-frequency signals of the first communication band and the fourth communication band; and

a second switch having a third selection terminal connected to the first filter, a fourth selection terminal connected to the fourth filter, and a fifth selection terminal connected to the amplifier, and exclusively switching between connection of the fifth selection terminal to the third selection terminal and connection of the fifth selection terminal to the fourth selection terminal,

wherein the fourth frequency band is located on a lower frequency side than the first frequency band, the second frequency band, and the third frequency band,

the fifth frequency band is located on the higher frequency side than the first frequency band, the second frequency band, the third frequency band, and the fourth frequency band.

7. The high-frequency module according to claim 3,

the fourth frequency band comprises 1700MHz-2700MHz,

the fourth communication band is any one of n1, n3, and n41 of 5G-NR.

8. The high-frequency module according to claim 3,

the first frequency band comprises 4400MHz-5000MHz,

the second frequency band includes 5925MHz-7125MHz,

the third frequency band comprises 5150MHz-5850MHz,

the fourth frequency band includes any one of 3300MHz-4200MHz and 3300MHz-3800MHz,

the first communications band is n79 of 5G-NR,

the second communications band is a WLAN6GHz band or NR-U,

the third communications band is the WLAN5GHz band or NR-U,

the fourth communication band is n77 or n78 of 5G-NR.

9. The high-frequency module as claimed in claim 1,

the first frequency band comprises 24.25GHz-27.50GHz,

the second frequency band includes any one of 37.00GHz-40.00GHz and 39.50GHz-43.50GHz,

the third frequency band includes any one of 26.50GHz-29.50GHz and 27.50GHz-28.35GHz,

the first communications band is n258 of 5G-NR,

the second communications band is n260 of 5G-NR or n259 of 5G-NR,

the third communication band is n257 of 5G-NR or n261 of 5G-NR.

10. The high-frequency module according to claim 3,

the first frequency band includes any one of 26.50GHz-29.50GHz and 27.50GHz-28.35GHz,

the second frequency band comprises 39.50GHz-43.50GHz,

the third frequency band comprises 37.00GHz-40.00GHz,

the fourth frequency band comprises 24.25GHz-27.50GHz,

the first communications band is n257 of 5G-NR or n261 of 5G-NR,

the second communications band is n259 of 5G-NR,

the third communication band is n260 of 5G-NR,

the fourth communication band is n258 of 5G-NR.

11. The high-frequency module as claimed in claim 1,

the first filter, the second filter and the third filter are disposed on the same substrate or in the same package.

12. The high-frequency module as claimed in claim 1,

the first filter, the second filter and the third filter are disposed on different substrates or in different packages.

13. A high-frequency module is provided with:

an antenna connection terminal;

a first switch having a first selection terminal, a second selection terminal, and a common terminal connected to the antenna connection terminal, and exclusively switching between connecting the common terminal to the first selection terminal and connecting the common terminal to the second selection terminal;

a first filter connected to the first selection terminal, the first filter having a passband in a first frequency band including a first communication band allocated as a communication band for a time division duplex system;

a second filter connected to the first selection terminal, the second filter having a passband in a second frequency band including a second communication band allocated as a communication band for the time division duplex system; and

a third filter connected to the second selection terminal, having a third frequency band as a pass band, the third frequency band including a third communication band allocated as a communication band for a time division duplex system,

wherein at least a portion of the third frequency band is located between the first frequency band and the second frequency band.

14. The high-frequency module as claimed in claim 13,

further comprises a fourth filter connected to the second selection terminal and having a fourth frequency band including a fourth communication band as a passband,

the fourth frequency band is located on the lower frequency side or the higher frequency side than the first frequency band, the second frequency band, and the third frequency band.

15. The high-frequency module as claimed in claim 13,

the first frequency band includes any one of 3300MHz-4200MHz and 3300MHz-3800MHz,

the second frequency band includes any of 5150MHz-5850MHz and 5150MHz-7125MHz,

the third frequency band comprises 4400MHz-5000MHz,

the first communications band is either n77 or n78 of 5G-NR,

the second communications band is WLAN or NR-U,

the third communication band is n79 or n78 of 5G-NR.

16. The high-frequency module according to claim 14, further comprising:

a fifth filter connected to the second selection terminal, the fifth filter having a fifth frequency band including a fifth communication band as a passband;

an amplifier capable of amplifying high-frequency signals of the first communication band and the fourth communication band; and

a second switch having a third selection terminal connected to the first filter, a fourth selection terminal connected to the fourth filter, and a fifth selection terminal connected to the amplifier, and exclusively switching between connection of the fifth selection terminal to the third selection terminal and connection of the fifth selection terminal to the fourth selection terminal,

wherein the fourth frequency band is located on a lower frequency side than the first frequency band, the second frequency band, and the third frequency band,

the fifth frequency band is located on the higher frequency side than the first frequency band, the second frequency band, the third frequency band, and the fourth frequency band.

17. The high-frequency module as claimed in claim 14,

the fourth frequency band comprises 1700MHz-2700MHz,

the fourth communication band is any one of n1, n3, and n41 of 5G-NR.

18. The high-frequency module as claimed in claim 14,

the first frequency band comprises 4400MHz-5000MHz,

the second frequency band includes 5925MHz-7125MHz,

the third frequency band comprises 5150MHz-5850MHz,

the fourth frequency band includes any one of 3300MHz-4200MHz and 3300MHz-3800MHz,

the first communications band is n79 of 5G-NR,

the second communications band is a WLAN6GHz band or NR-U,

the third communications band is the WLAN5GHz band or NR-U,

the fourth communication band is n77 or n78 of 5G-NR.

19. The high-frequency module as claimed in claim 13,

the first filter, the second filter and the third filter are disposed on the same substrate or in the same package.

20. The high-frequency module as claimed in claim 13,

the first filter, the second filter and the third filter are disposed on different substrates or in different packages.

Technical Field

The present invention relates to a high-frequency module and a communication apparatus.

Background

In recent communication services, for the purpose of increasing communication capacity and increasing communication speed, a communication band is made wider and a plurality of communication bands are used simultaneously.

Patent document 1 discloses a multiplexer capable of performing wavelength division and multiplexing of high-frequency signals in 2 different communication bands. The multiplexer disclosed in patent document 1 is configured by an LC filter including an inductor and a capacitor. Thus, the high-frequency signal of the wide-band communication band can be split and combined.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2006 and 128881

Disclosure of Invention

Problems to be solved by the invention

In 3GPP (Third Generation Partnership Project), in recent years, separate transmission and simultaneous transmission of high-frequency signals of n77, n78, n79, and the like of 5G (fifth Generation mobile communication system: 5th Generation) -NR (New Radio: New air interface) in a wide band used in a Time Division Duplex (TDD) system are specified.

However, when transmitting high-frequency signals in a wide-band communication band for TDD, the following problems occur: the isolation between the signal path through which the high-frequency signal of the communication band is transmitted and the signal path through which the high-frequency signal of the communication band close to the communication band is transmitted cannot be ensured, and the transmission loss increases.

Accordingly, an object of the present invention is to provide a high-frequency module and a communication device that realize low-loss transmission of signals in a TDD communication band.

Means for solving the problems

In order to achieve the above object, a high-frequency module according to an aspect of the present invention includes: a first antenna connection terminal and a second antenna connection terminal different from the first antenna connection terminal; a first filter having a passband in a first frequency band including a first communication band allocated as a communication band for a Time Division Duplex (TDD) system; a second filter having a second frequency band as a pass band, the second frequency band including a second communication band allocated as a communication band for TDD; and a third filter having a third frequency band as a pass band, the third frequency band including a third communication band allocated as a communication band for TDD, wherein at least a part of the third frequency band is located between the first frequency band and the second frequency band, both the first filter and the second filter are connected to one of the first antenna connection terminal and the second antenna connection terminal, and the third filter is connected to the other of the first antenna connection terminal and the second antenna connection terminal.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, a high-frequency module and a communication device that can realize low-loss transmission of signals in a TDD communication band can be provided.

Drawings

Fig. 1 is a circuit configuration diagram of a high-frequency module and a communication device according to embodiment 1.

Fig. 2 is a diagram showing a frequency relationship of pass bands of filters constituting the high-frequency module according to embodiment 1.

Fig. 3A is a circuit configuration diagram showing a first connection state of the high-frequency module according to the modification of embodiment 1.

Fig. 3B is a circuit configuration diagram showing a second connection state of the high-frequency module according to the modification of embodiment 1.

Fig. 3C is a schematic cross-sectional view showing an example of the structure of the antenna module according to embodiment 1.

Fig. 4 is a circuit configuration diagram of the high-frequency module and the antenna module according to embodiment 2.

Fig. 5 is a circuit configuration diagram of a high-frequency module and an antenna module according to embodiment 3.

Fig. 6 is a diagram showing a frequency relationship of pass bands of filters constituting the high-frequency module according to embodiment 3.

Fig. 7A is a circuit configuration diagram showing a first connection state of the high-frequency module according to the modification of embodiment 3.

Fig. 7B is a circuit configuration diagram showing a second connection state of the high-frequency module according to the modification of embodiment 3.

Fig. 8 is a circuit configuration diagram of a high-frequency module and an antenna module according to embodiment 4.

Fig. 9 is a circuit configuration diagram of a high-frequency module and an antenna module according to embodiment 5.

Fig. 10 is a diagram showing a frequency relationship of pass bands of filters constituting the high-frequency module according to embodiment 5.

Fig. 11A is a circuit configuration diagram showing a first connection state of the high-frequency module according to embodiment 5.

Fig. 11B is a circuit configuration diagram showing a second connection state of the high-frequency module according to embodiment 5.

Fig. 12 is a circuit configuration diagram of a high-frequency module according to a modification of embodiment 5.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The embodiments and modifications described below are all examples in general or specific. The numerical values, shapes, materials, constituent elements, arrangement of constituent elements, connection modes, and the like shown in the following embodiments and modifications are merely examples, and the gist thereof is not limited to the invention. Of the components of the embodiments and modifications described below, those not recited in the independent claims will be described as arbitrary components. The sizes of the components shown in the drawings and the ratio of the sizes are not necessarily strict.

In the following, the "signal path" indicates a transmission line including a filter through which a high-frequency signal passes, a wiring through which the high-frequency signal propagates, an electrode directly connected to the wiring, a terminal directly connected to the wiring or the electrode, and the like.

(embodiment mode 1)

[1.1 structures of the high-frequency module 1 and the communication device 6 ]

Fig. 1 is a circuit configuration diagram of a high-frequency module 1 and a communication device 6 according to embodiment 1. As shown in the figure, the communication device 6 includes a high-frequency module 1, antennas 2A and 2B, and an RF signal processing circuit (RFIC) 3.

RFIC 3 is an example of an RF signal processing circuit that processes high-frequency signals transmitted and received by antennas 2A and 2B. Specifically, the RFIC 3 performs signal processing such as down-conversion on the received signal input via the high-frequency module 1, and outputs the received signal generated by the signal processing to a baseband signal processing circuit (BBIC: not shown). Further, RFIC 3 outputs a transmission signal processed based on a signal input from BBIC to high-frequency module 1.

The antenna 2A is connected to the high-frequency circuit 10 of the high-frequency module 1, and radiates and transmits a high-frequency signal output from the high-frequency circuit 10, and receives a high-frequency signal from the outside and outputs the high-frequency signal to the high-frequency circuit 10. The antenna 2B is connected to the high-frequency circuit 20 of the high-frequency module 1, and radiates and transmits a high-frequency signal output from the high-frequency circuit 20, and receives a high-frequency signal from the outside and outputs the high-frequency signal to the high-frequency circuit 20.

The high-frequency circuits 10 and 20 may not be directly connected to the antennas 2A and 2B, and switches, impedance matching circuits, circulators, distributors, and the like may be interposed between the antenna 2A and the high-frequency circuit 10 and between the antenna 2B and the high-frequency circuit 20.

The antenna module 5 includes antennas 2A and 2B and a high-frequency module 1.

The high-frequency module 1 includes antenna connection terminals 100 and 200 and high-frequency circuits 10 and 20. As shown in fig. 1, the high-frequency circuit 10 includes filters 11 and 12, power amplifiers 51T and 52T, low-noise amplifiers 51R and 52R, and switches 41 and 42. The high-frequency circuit 20 includes a filter 21, a power amplifier 53T, a low-noise amplifier 53R, and a switch 43.

The antenna connection terminal 100 is an example of a first antenna connection terminal, and is connected to the high-frequency circuit 10. The antenna connection terminal 200 is an example of a second antenna connection terminal different from the first antenna connection terminal, and is connected to the high-frequency circuit 20.

The filter 11 is an example of a first filter, and is a high-frequency filter having a first frequency band including a first communication band allocated as a communication band for TDD as a pass band connected to the antenna connection terminal 100.

The filter 12 is an example of a second filter, and is a high-frequency filter having a second frequency band including a second communication band allocated as a communication band for TDD as a pass band connected to the antenna connection terminal 100.

The filter 21 is an example of a third filter, and is a high-frequency filter having a third frequency band including a third communication band allocated as a communication band for TDD as a pass band connected to the antenna connection terminal 200.

According to the above-described structures of the high-frequency module 1 and the antenna module 5, (1) the individual transmission of the signal of the first communication band, (2) the individual transmission of the signal of the second communication band, (3) the individual transmission of the signal of the third communication band, (4) the simultaneous transmission of the signal of the first communication band and the signal of the second communication band, (5) the simultaneous transmission of the signal of the first communication band and the signal of the third communication band, (6) the simultaneous transmission of the signal of the second communication band and the signal of the third communication band, and (7) the simultaneous transmission of the signal of the first communication band and the signal of the second communication band and the signal of the third communication band can be performed.

Fig. 2 is a diagram showing a frequency relationship of pass bands of the filters constituting the high-frequency module 1 according to embodiment 1. In the figure, the first, second, and third communication bands allocated as the communication bands for TDD, and the frequency relationship of the filters 11, 12, and 21 are shown. In the present embodiment, the first communication band, the third communication band, and the second communication band are provided in this order from the low frequency side. According to this relationship, a first frequency band including the first communication band, a third frequency band including the third communication band, and a second frequency band including the second communication band are also provided in this order from the low frequency side. In other words, the third frequency band is located between the first frequency band and the second frequency band. The third frequency band may overlap with the first frequency band and the second frequency band, as long as at least a part of the third frequency band is located between the first frequency band and the second frequency band. Correspondingly, at least a part of the pass band of the filter 21 is located between the pass band of the filter 11 and the pass band of the filter 12.

Further, the first communication band, the third communication band, and the second communication band may be provided in this order from the high frequency side, and according to this relationship, the first frequency band including the first communication band, the third frequency band including the third communication band, and the second frequency band including the second communication band may also be provided in this order from the high frequency side.

As shown in fig. 1, one end of the filter 11 and one end of the filter 12 are both connected to the antenna connection terminal 100, and one end of the filter 21 is connected to the antenna connection terminal 200. The filters 11 and 12 constitute a multiplexer 31.

Here, the frequency interval between the first frequency band (first communication band) and the third frequency band (third communication band) is smaller than the frequency interval between the first frequency band (first communication band) and the second frequency band (second communication band). In addition, the frequency interval between the second frequency band (second communication band) and the third frequency band (third communication band) is smaller than the frequency interval between the first frequency band (first communication band) and the second frequency band (second communication band). Therefore, for example, in the case of simultaneously transmitting a signal of the first communication band and a signal of the third communication band or in the case of simultaneously transmitting a signal of the second communication band and a signal of the third communication band, since the frequency interval between the communication bands is small, there is a concern that: the isolation between the 2 signals simultaneously transmitted is deteriorated and thus the transmission loss is increased. In addition, there is a concern that: in the case of transmitting a signal of the first communication band alone, a signal of the first communication band leaks to a signal path transmitting a signal of the third communication band, in the case of transmitting a signal of the second communication band alone, a signal of the second communication band leaks to a signal path transmitting a signal of the third communication band, and in addition, in the case of transmitting a signal of the third communication band alone, a signal of the third communication band leaks to a signal path transmitting a signal of the first communication band and a signal path transmitting a signal of the second communication band. In addition, there is a concern that: in the case of simultaneously transmitting a signal of the first communication band and a signal of the second communication band, the signal of the first communication band and the signal of the second communication band leak to a signal path on which a signal of the third communication band is transmitted.

In contrast, according to the high-frequency module 1 of the present embodiment, the filters 11 and 12 are connected to the antenna connection terminal 100, and the filter 21 is connected to the antenna connection terminal 200. That is, since the filter 11 and the filter 21 are connected to different antennas, it is possible to ensure a high isolation between the signal of the first communication band passing through the filter 11 and the signal of the third communication band passing through the filter 21. Further, since the filter 12 and the filter 21 are connected to different antennas, a high isolation between the signal of the second communication band passing through the filter 12 and the signal of the third communication band passing through the filter 21 can be ensured.

Therefore, a high isolation between 2 signals in the case of simultaneously transmitting the signal of the first communication band and the signal of the third communication band or in the case of simultaneously transmitting the signal of the second communication band and the signal of the third communication band is ensured, and low-loss transmission can be realized. In addition, in the case of transmitting the signal of the first communication band alone, high isolation is ensured between the signal path through which the signal of the first communication band is transmitted and the signal path through which the signal of the third communication band is transmitted, and low-loss transmission can be achieved. In addition, in the case of transmitting the signal of the second communication band alone, high isolation is ensured between the signal path transmitting the signal of the second communication band and the signal path transmitting the signal of the third communication band, and low-loss transmission can be achieved. In addition, when the signal of the third communication band is transmitted alone, high isolation is ensured between the signal path through which the signal of the third communication band is transmitted and the signal path through which the signal of the first communication band is transmitted and the signal path through which the signal of the second communication band is transmitted, and low-loss transmission can be achieved. In addition, in the case of simultaneously transmitting a signal of the first communication band and a signal of the second communication band, high isolation is ensured between a signal path through which the signal of the first communication band is transmitted, a signal path through which the signal of the second communication band is transmitted, and a signal path through which the signal of the third communication band is transmitted, and low-loss transmission can be achieved.

In addition, since the frequency interval between wide-band TDD communication bands is small in the related art, when the steepness of the attenuation slope near the passband is required, if the isolation between adjacent TDD communication bands is to be ensured, the phase change of the signal at the end of the passband becomes large. Therefore, the amplitude variation due to the ripple in the passband becomes large, and hence a so-called EVM (Error Vector Magnitude) tends to deteriorate. In particular, since the EVM is strictly regulated when the TDD communication band supports NR, a countermeasure against degradation of the EVM is required. From this viewpoint, the high-frequency module 1 according to the present embodiment is also effective as a configuration capable of suppressing degradation of the EVM.

Next, circuit components other than the filters of the high frequency circuits 10 and 20 will be described.

The power amplifier 51T is a transmission amplifier that amplifies a transmission signal of a first frequency band including a first communication band. The input terminal of the power amplifier 51T is connected to the transmission input terminal 110. The low noise amplifier 51R is a reception amplifier that amplifies a reception signal of a first frequency band including a first communication band. The output terminal of the low noise amplifier 51R is connected to the reception output terminal 120.

The power amplifier 52T is a transmission amplifier that amplifies a transmission signal of a second frequency band including a second communication band. The input terminal of the power amplifier 52T is connected to the transmission input terminal 130. The low noise amplifier 52R is a reception amplifier that amplifies a reception signal of a second frequency band including a second communication band. The output terminal of the low noise amplifier 52R is connected to the reception output terminal 140.

The power amplifier 53T is a transmission amplifier that amplifies a transmission signal of a third frequency band including a third communication band. The input terminal of the power amplifier 53T is connected to the transmission input terminal 210. The low noise amplifier 53R is a reception amplifier that amplifies a reception signal of a third frequency band including a third communication band. The output terminal of the low noise amplifier 53R is connected to the reception output terminal 220.

The switch 41 has a common terminal 41a and selection terminals 41b and 41c, and exclusively switches between connecting the common terminal 41a to the selection terminal 41b and connecting the common terminal 41a to the selection terminal 41 c. The common terminal 41a is connected to the other end of the filter 11, the selection terminal 41b is connected to the output terminal of the power amplifier 51T, and the selection terminal 41c is connected to the input terminal of the low noise amplifier 51R. By the switching operation of the switch 41, the high-frequency circuit 10 transmits the transmission signal of the first communication band and the reception signal of the first communication band in a time-division manner.

The switch 42 has a common terminal 42a and selection terminals 42b and 42c, and exclusively switches between connecting the common terminal 42a to the selection terminal 42b and connecting the common terminal 42a to the selection terminal 42 c. The common terminal 42a is connected to the other end of the filter 12, the selection terminal 42b is connected to the output terminal of the power amplifier 52T, and the selection terminal 42c is connected to the input terminal of the low noise amplifier 52R. By the switching operation of the switch 42, the high-frequency circuit 10 transmits the transmission signal of the second communication band and the reception signal of the second communication band in a time-division manner.

The switch 43 has a common terminal 43a and selection terminals 43b and 43c, and exclusively switches between connecting the common terminal 43a to the selection terminal 43b and connecting the common terminal 43a to the selection terminal 43 c. The common terminal 43a is connected to the other end of the filter 21, the selection terminal 43b is connected to the output terminal of the power amplifier 53T, and the selection terminal 43c is connected to the input terminal of the low noise amplifier 53R. By the switching operation of the switch 43, the high-frequency circuit 20 transmits the transmission signal of the third communication band and the reception signal of the third communication band in a time-division manner.

[ Structure of high-frequency Module according to variation 1.2 ]

In the high-frequency module according to the present embodiment, a switch 45 that performs the following switching operation may be disposed between the high-frequency circuits 10 and 20 and the antennas 2A and 2B.

Fig. 3A is a circuit configuration diagram showing a first connection state of the high-frequency module according to the modification of embodiment 1. Fig. 3B is a circuit configuration diagram showing a second connection state of the high-frequency module according to the modification of embodiment 1.

As shown in fig. 3A and 3B, the high-frequency module according to the present modification includes a switch 45 in addition to the components included in the high-frequency module 1 according to embodiment 1.

The switch 45 is an example of a first switch, and includes a common terminal 45a (first common terminal), a common terminal 45b (second common terminal), a selection terminal 45c (first selection terminal), and a selection terminal 45d (second selection terminal). The common terminal 45a is exclusively connected to the selection terminal 45c or 45d, and the common terminal 45b is exclusively connected to the selection terminal 45c or 45 d. The common terminal 45a is connected to the antenna connection terminal 100, the common terminal 45b is connected to the antenna connection terminal 200, the selection terminal 45c is connected to one end of the filter 11 and one end of the filter 12, and the selection terminal 45d is connected to one end of the filter 21.

With the above configuration, the high-frequency module according to the present modification is in the first connection state shown in fig. 3A or the second connection state shown in fig. 3B. In the first connection state, the high-frequency circuit 10 and the antenna 2A are connected, and the high-frequency circuit 20 and the antenna 2B are connected. In the second connection state, the high-frequency circuit 10 and the antenna 2B are connected, and the high-frequency circuit 20 and the antenna 2A are connected.

That is, in the high-frequency module according to the present modification, both the filters 11 and 12 are connected to one of the antenna connection terminals 100 and 200 via the selection terminal 45c, and the filter 21 is connected to the other of the antenna connection terminals 100 and 200 via the selection terminal 45 d.

According to the high-frequency module of the present modification, the filters 11 and 12 are connected to one of the antenna connection terminals 100 and 200, and the filter 21 is connected to the other of the antenna connection terminals 100 and 200. That is, since the filter 11 and the filter 21 are connected to different antennas, it is possible to ensure a high isolation between the signal of the first communication band passing through the filter 11 and the signal of the third communication band passing through the filter 21. Further, since the filter 12 and the filter 21 are connected to different antennas, a high isolation between the signal of the second communication band passing through the filter 12 and the signal of the third communication band passing through the filter 21 can be ensured.

In the high-frequency module 1 according to embodiment 1, the antenna module 5 may be an antenna module that transmits a high-frequency signal in a millimeter wave band. For example, the first frequency band may include 24.25GHz to 27.50GHz, the second frequency band may include any one of 37.00GHz to 40.00GHz and 39.50GHz to 43.50GHz, and the third frequency band may include any one of 26.50GHz to 29.50GHz and 27.50GHz to 28.35 GHz. In this case, for example, as the first communication band, n258(24.25GHz-27.50GHz) of 5G-NR is applied, as the second communication band, n260(37.00GHz-40.00GHz) of 5G-NR or n259(39.50GHz-43.50GHz) of 5G-NR is applied, and as the third communication band, n257(26.50GHz-29.50GHz) of 5G-NR or n261(27.50GHz-28.35GHz) of 5G-NR is applied.

Fig. 3C is a schematic cross-sectional view showing an example of the structure of the antenna module 5 according to embodiment 1. When the antenna module 5 is an antenna module that transmits a high-frequency signal in a millimeter wave band, as shown in the figure, the antennas 2A and 2B, the filter 21, the multiplexer 31, and the RFIC 3 are disposed on the module substrate 60.

The antennas 2A and 2B are, for example, planar antennas or linear antennas disposed on the main surface 60a of the module substrate, and the antennas 2A and 2B do not overlap each other when the module substrate 60 is viewed from above.

The filter 21 and the multiplexer 31 may be each configured by, for example, a distributed constant filter. The distributed constant filter is a filter having at least one of an 1/2-wavelength line and a 1/4-wavelength line.

In addition, the antennas 2A and 2B, the filter 21, and the multiplexer 31 may be disposed on different substrates instead of the same module substrate 60.

Furthermore, the antenna module 5 may also comprise an RFIC 3.

(embodiment mode 2)

The high-frequency module according to embodiment 1 has a configuration in which the high-frequency circuits 10 and 20 are connected to different antennas, but the high-frequency module according to the present embodiment has a configuration in which the high-frequency circuits 10 and 20 are connected to the same antenna 2.

[2.1 Structure of high-frequency Module 1A ]

Fig. 4 is a circuit configuration diagram of the high-frequency module 1A and the antenna module 5A according to embodiment 2.

The antenna module 5A includes the antenna 2 and the high-frequency module 1A. The antenna module 5A according to the present embodiment differs from the antenna module 5 according to embodiment 1 in terms of the following configuration: 1 antenna 2 is configured; and the high-frequency module 1A includes a switch 40. Next, the antenna module 5A and the high-frequency module 1A according to the present embodiment will be described mainly with respect to differences, with the same description of the aspects as the antenna module 5 and the high-frequency module 1 according to embodiment 1 omitted.

The antenna 2 is connected to the switch 40 of the high-frequency module 1A, radiates and transmits a high-frequency signal output from the high-frequency circuit 10 or 20, receives a high-frequency signal from the outside, and outputs the high-frequency signal to the high-frequency circuit 10 or 20.

The switch 40 may not be directly connected to the antenna 2, and an impedance matching circuit, a circulator, a distributor, and the like may be interposed between the antenna 2 and the switch 40.

As shown in fig. 4, the high-frequency module 1A includes an antenna connection terminal 100, high-frequency circuits 10 and 20, and a switch 40.

The switch 40 has a common terminal 40a, a selection terminal 40b (first selection terminal), and a selection terminal 40c (second selection terminal). The switch 40 exclusively switches between connecting the common terminal 40a and the selection terminal 40b and connecting the common terminal 40a and the selection terminal 40 c.

As shown in fig. 4, one end of the filter 11 and one end of the filter 12 are both connected to the selection terminal 40b, and one end of the filter 21 is connected to the selection terminal 40 c. The filters 11 and 12 constitute a multiplexer 31.

According to the above-described structures of the high-frequency module 1A and the antenna module 5A, (1) individual transmission of a signal of the first communication band, (2) individual transmission of a signal of the second communication band, (3) individual transmission of a signal of the third communication band, and (4) simultaneous transmission of a signal of the first communication band and a signal of the second communication band can be performed.

Here, as shown in fig. 2, the frequency interval between the first frequency band (first communication band) and the third frequency band (third communication band) is smaller than the frequency interval between the first frequency band (first communication band) and the second frequency band (second communication band). In addition, the frequency interval between the second frequency band (second communication band) and the third frequency band (third communication band) is smaller than the frequency interval between the first frequency band (first communication band) and the second frequency band (second communication band). Therefore, for example, there are the following concerns: in the case of transmitting a signal of the first communication band alone, a signal of the first communication band leaks to a signal path transmitting a signal of the third communication band, in the case of transmitting a signal of the second communication band alone, a signal of the second communication band leaks to a signal path transmitting a signal of the third communication band, and in addition, in the case of transmitting a signal of the third communication band alone, a signal of the third communication band leaks to a signal path transmitting a signal of the first communication band and a signal path transmitting a signal of the second communication band. In addition, there is a concern that: in the case of simultaneously transmitting a signal of the first communication band and a signal of the second communication band, the signal of the first communication band and the signal of the second communication band leak to a signal path on which a signal of the third communication band is transmitted.

In contrast, according to the high-frequency module 1A of the present embodiment, the filters 11 and 12 are connected to the selection terminal 40b of the switch 40, and the filter 21 is connected to the selection terminal 40c of the switch 40. That is, since the filter 11 and the filter 21 are not connected at the same time by the exclusive connection of the switch 40, it is possible to secure a high isolation between the filter 11 and the filter 21. In addition, since the filter 12 and the filter 21 are not connected at the same time by the exclusive connection of the switch 40, a high isolation degree between the filter 12 and the filter 21 can be ensured.

Therefore, in the case of transmitting the signal of the first communication band alone, a high degree of isolation is ensured between the signal path through which the signal of the first communication band is transmitted and the signal path through which the signal of the third communication band is transmitted, and low-loss transmission can be achieved. In addition, in the case of transmitting the signal of the second communication band alone, high isolation is ensured between the signal path transmitting the signal of the second communication band and the signal path transmitting the signal of the third communication band, and low-loss transmission can be achieved. In addition, when the signal of the third communication band is transmitted alone, high isolation is ensured between the signal path through which the signal of the third communication band is transmitted and the signal path through which the signal of the first communication band is transmitted and the signal path through which the signal of the second communication band is transmitted, and low-loss transmission can be achieved. In addition, in the case of simultaneously transmitting a signal of the first communication band and a signal of the second communication band, high isolation is ensured between a signal path through which the signal of the first communication band is transmitted, a signal path through which the signal of the second communication band is transmitted, and a signal path through which the signal of the third communication band is transmitted, and low-loss transmission can be achieved.

In the high-frequency module 1 according to embodiment 1 and the high-frequency module 1A according to embodiment 2, the filters 11, 12, and 21 may be disposed on the same substrate or in the same package. The high-frequency circuits 10 and 20 may be disposed on the same substrate or in the same package.

This makes it possible to reduce the size of the high-frequency modules 1 and 1A.

In the high-frequency module 1 according to embodiment 1 and the high-frequency module 1A according to embodiment 2, the filters 11 and 12 and the filter 21 may be disposed on different substrates or in different packages. The high-frequency circuits 10 and 20 may be disposed on different substrates or in different packages.

Accordingly, the isolation between the signal path of the first communication band and the signal path of the second communication band and the signal path of the third communication band can be further improved.

In the high-frequency module 1 according to embodiment 1 and the high-frequency module 1A according to embodiment 2, for example, the first frequency band may include any one of 3300MHz to 4200MHz and 3300MHz to 3800MHz, the second frequency band may include any one of 5150MHz to 5850MHz and 5150MHz to 7125MHz, and the third frequency band may include 4400MHz to 5000 MHz. In this case, for example, as the first communication band, n77(3300MHz-4200MHz) or n78(3300MHz-3800MHz) of 5G-NR is applied, as the second communication band, WLAN (Wireless Local Area Network): 5.15GHz-7.125GHz band) or NR-U is applied, and as the third communication band, n79(4400MHz-5000MHz) or n78 of 5G-NR is applied.

Further, NR-U is 5G-NR of 3GPP at 5GHz or higher, and corresponds to a communication band U-NII in an unlicensed band of Federal Communications Commission (FCC). In addition, WLAN (5.15GHz-7.125GHz band) complies with IEEE802.11, which is a wireless LAN standard.

In the high-frequency module 1 according to embodiment 1 and the high-frequency module 1A according to embodiment 2, for example, the first frequency band may include 1700MHz to 2700MHz, the second frequency band may include 4400MHz to 5000MHz, and the third frequency band may include 3300MHz to 4200 MHz. In this case, for example, n40(2300MHz-2400MHz) or n41(2496MHz-2690MHz) of 5G-NR is applied as the first communication band, n79(4400MHz-5000MHz) of 5G-NR is applied as the second communication band, and n77(3300MHz-4200MHz) or n78(3300MHz-3800MHz) of 5G-NR is applied as the third communication band.

In the high-frequency module 1 according to embodiment 1 and the high-frequency module 1A according to embodiment 2, for example, the first frequency band may include 1700MHz to 2700MHz, the second frequency band may include any one of 5150MHz to 5850MHz and 5150MHz to 7125MHz, and the third frequency band may include 4400MHz to 5000 MHz. In this case, for example, n40(2300MHz-2400MHz) or n41(2496MHz-2690MHz) of 5G-NR is applied as the first communication band, WLAN (Wireless Local Area Network: 5.15GHz-7.125GHz band) or NR-U is applied as the second communication band, and n79(4400MHz-5000MHz) of 5G-NR is applied as the third communication band.

(embodiment mode 3)

The high-frequency modules according to embodiments 1 and 2 have a circuit configuration for transmitting signals of the first to third communication bands, but the high-frequency module according to the present embodiment has a configuration in which a circuit for transmitting a signal of the fourth communication band is further added.

Fig. 5 is a circuit configuration diagram of the high-frequency module 1B and the antenna module 5B according to embodiment 3.

The antenna module 5B includes the antennas 2A and 2B and the high-frequency module 1B. The antenna module 5B according to the present embodiment is different from the antenna module 5 according to embodiment 1 in the circuit configuration of the high-frequency circuit 20B included in the high-frequency module 1B. Next, the antenna module 5B and the high-frequency module 1B according to the present embodiment will be described mainly with respect to differences, with the same description of the aspects as the antenna module 5 and the high-frequency module 1 according to embodiment 1 omitted.

The high-frequency circuits 10 and 20B may not be directly connected to the antennas 2A and 2B, and switches, impedance matching circuits, circulators, distributors, and the like may be interposed between the antenna 2A and the high-frequency circuit 10 and between the antenna 2B and the high-frequency circuit 20B.

The high-frequency module 1B includes antenna connection terminals 100 and 200 and high-frequency circuits 10 and 20B. As shown in fig. 5, the high-frequency circuit 10 includes filters 11 and 12, power amplifiers 51T and 52T, low-noise amplifiers 51R and 52R, and switches 41 and 42. The high-frequency circuit 20B includes filters 21 and 22, power amplifiers 53T and 54T, low-noise amplifiers 53R and 54R, and switches 43 and 44.

The filter 21 is an example of a third filter, and is a high-frequency filter having a third frequency band including a third communication band allocated as a communication band for TDD as a pass band connected to the antenna connection terminal 200.

The filter 22 is an example of a fourth filter, and is a high-frequency filter having a passband in a fourth frequency band including a fourth communication band allocated as a communication band for TDD, which is connected to the antenna connection terminal 200. The fourth communication band may not be a communication band for TDD, and may be a communication band for Frequency Division Duplex (FDD), for example.

According to the above-described structures of the high-frequency module 1B and the antenna module 5B, (1) individual transmission of a signal of the first communication band, (2) individual transmission of a signal of the second communication band, (3) individual transmission of a signal of the third communication band, (4) individual transmission of a signal of the fourth communication band, (5) simultaneous transmission of a signal of the first communication band and a signal of the second communication band, (6) simultaneous transmission of a signal of the third communication band and a signal of the fourth communication band, (7) simultaneous transmission of a signal of the first communication band and a signal of the third communication band, (8) simultaneous transmission of a signal of the second communication band and a signal of the third communication band, (9) simultaneous transmission of a signal of the fourth communication band and a signal of the first communication band, (10) simultaneous transmission of a signal of the fourth communication band and a signal of the second communication band, and, And (11) simultaneously transmitting 3 or more signals among the signal of the first communication band, the signal of the second communication band, the signal of the third communication band, and the signal of the fourth communication band.

Fig. 6 is a diagram showing a frequency relationship of pass bands of the filters constituting the high-frequency module 1B according to embodiment 3. In the figure, the first communication band, the second communication band, the third communication band, and the fourth communication band, and the frequency relationship of the filters 11, 12, 21, and 22 are shown. In the present embodiment, the fourth communication band, the first communication band, the third communication band, and the second communication band are provided in this order from the low frequency side. According to this relationship, a fourth frequency band including a fourth communication band, a first frequency band including the first communication band, a third frequency band including the third communication band, and a second frequency band including the second communication band are also provided in this order from the low frequency side. In other words, the third frequency band is located between the first frequency band and the second frequency band. The third frequency band may overlap with the first frequency band and the second frequency band, as long as at least a part of the third frequency band is located between the first frequency band and the second frequency band. The fourth frequency band is located on the lower frequency side than the first frequency band. The fourth frequency band may overlap with the first frequency band. Correspondingly, at least a part of the pass band of the filter 21 is located between the pass band of the filter 11 and the pass band of the filter 12. The passband of the filter 22 is located on the lower frequency side than the passband of the filter 11.

Further, the fourth communication band, the first communication band, the third communication band, and the second communication band may be provided in this order from the high frequency side, and according to this relationship, the fourth frequency band including the fourth communication band, the first frequency band including the first communication band, the third frequency band including the third communication band, and the second frequency band including the second communication band may also be provided in this order from the high frequency side.

As shown in fig. 5, one end of the filter 11 and one end of the filter 12 are both connected to the antenna connection terminal 100, and one end of the filter 21 and one end of the filter 22 are both connected to the antenna connection terminal 200. The filters 11 and 12 constitute a multiplexer 31, and the filters 21 and 22 constitute a multiplexer 32.

Here, the frequency interval between the first frequency band (first communication band) and the third frequency band (third communication band) is smaller than the frequency interval between the first frequency band (first communication band) and the second frequency band (second communication band). In addition, the frequency interval between the second frequency band (second communication band) and the third frequency band (third communication band) is smaller than the frequency interval between the first frequency band (first communication band) and the second frequency band (second communication band). Therefore, for example, in the case of simultaneously transmitting a signal of the first communication band and a signal of the third communication band or in the case of simultaneously transmitting a signal of the second communication band and a signal of the third communication band, since the frequency interval between the communication bands is small, there is a concern that: the isolation between the 2 signals simultaneously transmitted is deteriorated and thus the transmission loss is increased.

In addition, the frequency interval between the fourth frequency band (fourth communication band) and the first frequency band (first communication band) is smaller than the frequency interval between the fourth frequency band (fourth communication band) and the third frequency band (third communication band). In addition, the frequency interval between the third frequency band (third communication band) and the first frequency band (first communication band) is smaller than the frequency interval between the fourth frequency band (fourth communication band) and the third frequency band (third communication band). Therefore, for example, in the case of simultaneously transmitting a signal of the fourth communication band and a signal of the first communication band, since the frequency interval between the communication bands is small, there is a concern that: the isolation between the 2 signals simultaneously transmitted is deteriorated and thus the transmission loss is increased.

In addition, there is a concern that: in the case of transmitting the signal of the first communication band alone, the signal of the first communication band leaks to a signal path transmitting the signal of the third communication band and a signal path transmitting the signal of the fourth communication band, and in the case of transmitting the signal of the second communication band alone, the signal of the second communication band leaks to a signal path transmitting the signal of the third communication band. In addition, there is a concern that: in the case of transmitting a signal of the third communication band alone, a signal of the third communication band leaks to a signal path transmitting a signal of the first communication band and a signal path transmitting a signal of the second communication band, and in the case of transmitting a signal of the fourth communication band alone, a signal of the fourth communication band leaks to a signal path transmitting a signal of the first communication band. In addition, there is a concern that: in the case of simultaneously transmitting a signal of the first communication band and a signal of the second communication band, the signal of the first communication band and the signal of the second communication band leak to a signal path on which a signal of the third communication band is transmitted. In addition, there is a concern that: in the case of simultaneously transmitting a signal of the third communication band and a signal of the fourth communication band, the signal of the third communication band and the signal of the fourth communication band leak to a signal path on which the signal of the first communication band is transmitted.

In contrast, according to the high-frequency module 1B of the present embodiment, the filters 11 and 12 are connected to the antenna connection terminal 100, and the filters 21 and 22 are connected to the antenna connection terminal 200. That is, since the filter 21 and the filter 11 are connected to different antennas, it is possible to ensure a high isolation between the signal of the third communication band passing through the filter 21 and the signal of the first communication band passing through the filter 11. Further, since the filter 21 and the filter 12 are connected to different antennas, a high isolation between the signal of the third communication band passing through the filter 21 and the signal of the second communication band passing through the filter 12 can be ensured. Since the filter 22 and the filter 11 are connected to different antennas, a high isolation can be ensured between the signal of the fourth communication band that passes through the filter 22 and the signal of the first communication band that passes through the filter 11. Since the filter 22 and the filter 12 are connected to different antennas, a high isolation can be ensured between the signal of the fourth communication band that passes through the filter 22 and the signal of the second communication band that passes through the filter 12.

Therefore, a high isolation between 2 signals is ensured in the case where the signal of the first communication band and the signal of the third communication band are simultaneously transmitted, the case where the signal of the first communication band and the signal of the fourth communication band are simultaneously transmitted, the case where the signal of the second communication band and the signal of the third communication band are simultaneously transmitted, or the case where the signal of the second communication band and the signal of the fourth communication band are simultaneously transmitted, and transmission with low loss can be achieved. In addition, when the signal of the first communication band is transmitted alone, high isolation is ensured between the signal path through which the signal of the first communication band is transmitted and the signal path through which the signal of the third communication band is transmitted and the signal path through which the signal of the fourth communication band is transmitted, and low-loss transmission can be achieved. In addition, in the case of transmitting the signal of the second communication band alone, high isolation is ensured between the signal path transmitting the signal of the second communication band and the signal path transmitting the signal of the third communication band, and low-loss transmission can be achieved. In addition, when the signal of the third communication band is transmitted alone, high isolation is ensured between the signal path through which the signal of the third communication band is transmitted and the signal path through which the signal of the first communication band is transmitted and the signal path through which the signal of the second communication band is transmitted, and low-loss transmission can be achieved. In addition, when the signal of the fourth communication band is transmitted alone, high isolation between the signal path through which the signal of the first communication band is transmitted and the signal path through which the signal of the fourth communication band is transmitted is ensured, and low-loss transmission can be achieved. In addition, when a signal of the first communication band and a signal of the second communication band are simultaneously transmitted or when a signal of the third communication band and a signal of the fourth communication band are simultaneously transmitted, high isolation between a signal path through which the signal of the first communication band is transmitted and a signal path through which the signal of the second communication band is transmitted and a signal path through which the signal of the third communication band is transmitted and a signal path through which the signal of the fourth communication band is transmitted is ensured, and low-loss transmission can be achieved.

The power amplifier 54T is a transmission amplifier that amplifies a transmission signal of a fourth frequency band including a fourth communication band. The input terminal of the power amplifier 54T is connected to the transmission input terminal 230. The low noise amplifier 54R is a reception amplifier that amplifies a reception signal of a fourth frequency band including a fourth communication band. The output terminal of the low noise amplifier 54R is connected to the reception output terminal 240.

The switch 44 has a common terminal 44a and selection terminals 44b and 44c, and exclusively switches between connecting the common terminal 44a to the selection terminal 44b and connecting the common terminal 44a to the selection terminal 44 c. The common terminal 44a is connected to the other end of the filter 22, the selection terminal 44b is connected to the output terminal of the power amplifier 54T, and the selection terminal 44c is connected to the input terminal of the low noise amplifier 54R. By the switching operation of the switch 44, the high-frequency circuit 20B transmits the transmission signal of the fourth communication band and the reception signal of the fourth communication band in a time-division manner.

[3.2 Structure of high-frequency Module according to variation ]

In the high-frequency module according to the present embodiment, a switch 46 that performs the following switching operation may be disposed between the high-frequency circuits 10 and 20B and the antennas 2A and 2B.

Fig. 7A is a circuit configuration diagram showing a first connection state of the high-frequency module according to the modification of embodiment 3. Fig. 7B is a circuit configuration diagram showing a second connection state of the high-frequency module according to the modification of embodiment 3.

As shown in fig. 7A and 7B, the high-frequency module according to the present modification includes a switch 46 in addition to the components included in the high-frequency module 1B according to embodiment 3.

The switch 46 is an example of a first switch, and has a common terminal 46a (first common terminal), a common terminal 46b (second common terminal), a selection terminal 46c (first selection terminal), and a selection terminal 46d (second selection terminal). The common terminal 46a is exclusively connected with the selection terminal 46c or 46d, and the common terminal 46b is exclusively connected with the selection terminal 46c or 46 d. The common terminal 46a is connected to the antenna connection terminal 100, the common terminal 46b is connected to the antenna connection terminal 200, the selection terminal 46c is connected to one end of the filter 11 and one end of the filter 12, and the selection terminal 46d is connected to one end of the filter 21 and one end of the filter 22.

With the above configuration, the high-frequency module according to the present modification is in the first connection state shown in fig. 7A or the second connection state shown in fig. 7B. In the first connection state, the high-frequency circuit 10 and the antenna 2A are connected, and the high-frequency circuit 20B and the antenna 2B are connected. In the second connection state, the high-frequency circuit 10 and the antenna 2B are connected, and the high-frequency circuit 20B and the antenna 2A are connected.

That is, in the high-frequency module according to the present modification, both the filters 11 and 12 are connected to one of the antenna connection terminals 100 and 200 via the selection terminal 45c, and both the filters 21 and 22 are connected to the other of the antenna connection terminals 100 and 200 via the selection terminal 45 d.

According to the high-frequency module of the present modification, the filters 11 and 12 are connected to one of the antenna connection terminals 100 and 200, and the filters 21 and 22 are connected to the other of the antenna connection terminals 100 and 200. That is, since the filter 21 and the filter 11 are connected to different antennas, it is possible to ensure a high isolation between the signal of the third communication band passing through the filter 21 and the signal of the first communication band passing through the filter 11. Further, since the filter 21 and the filter 12 are connected to different antennas, a high isolation between the signal of the third communication band passing through the filter 21 and the signal of the second communication band passing through the filter 12 can be ensured. Since the filter 22 and the filter 11 are connected to different antennas, a high isolation can be ensured between the signal of the fourth communication band that passes through the filter 22 and the signal of the first communication band that passes through the filter 11. Since the filter 22 and the filter 12 are connected to different antennas, a high isolation can be ensured between the signal of the fourth communication band that passes through the filter 22 and the signal of the second communication band that passes through the filter 12.

In the high-frequency module 1B according to embodiment 3, for example, the first frequency band may include any one of 26.50GHz-29.50GHz and 27.50GHz-28.35GHz, the second frequency band may include 39.50GHz-43.50GHz, the third frequency band may include 37.00GHz-40.00GHz, and the fourth frequency band may include 24.25GHz-27.50 GHz. In this case, for example, n257(26.50GHz-29.50GHz) of 5G-NR or n261(27.50GHz-28.35GHz) of 5G-NR is applied as the first communication band, n259(39.50GHz-43.50GHz) of 5G-NR is applied as the second communication band, n260(37.00GHz-40.00GHz) of 5G-NR is applied as the third communication band, and n258(24.25GHz-27.50GHz) of 5G-NR is applied as the fourth communication band.

(embodiment mode 4)

The high-frequency module according to embodiment 3 has a configuration in which the high-frequency circuits 10 and 20B are connected to different antennas, but the high-frequency module according to the present embodiment has a configuration in which the high-frequency circuits 10 and 20B are connected to the same antenna.

[4.1 Structure of high-frequency Module 1C ]

Fig. 8 is a circuit configuration diagram of the high-frequency module 1C and the antenna module 5C according to embodiment 4.

The antenna module 5C includes the antenna 2 and the high-frequency module 1C. The antenna module 5C according to the present embodiment differs from the antenna module 5B according to embodiment 3 in terms of the following configuration: 1 antenna 2 is configured; and the high frequency module 1C is provided with a switch 47. Next, the antenna module 5C and the high-frequency module 1C according to the present embodiment are not described in the same manner as the antenna module 5B and the high-frequency module 1B according to embodiment 3, and different aspects will be mainly described.

The antenna 2 is connected to the switch 47 of the high-frequency module 1C, and radiates and transmits a high-frequency signal output from the high-frequency circuit 10 or 20B, and receives a high-frequency signal from the outside and outputs the high-frequency signal to the high-frequency circuit 10 or 20B.

The switch 47 may not be directly connected to the antenna 2, and an impedance matching circuit, a circulator, a distributor, and the like may be interposed between the antenna 2 and the switch 47.

As shown in fig. 8, the high-frequency module 1C includes an antenna connection terminal 100, high-frequency circuits 10 and 20B, and a switch 47.

The switch 47 is an example of a first switch, and has a common terminal 47a, a selection terminal 47b (first selection terminal), and a selection terminal 47c (second selection terminal). The switch 47 exclusively switches between connecting the common terminal 47a and the selection terminal 47b and connecting the common terminal 47a and the selection terminal 47 c.

As shown in fig. 8, one end of the filter 11 and one end of the filter 12 are both connected to the selection terminal 47b, and one end of the filter 21 and one end of the filter 22 are both connected to the selection terminal 47 c. The filters 11 and 12 constitute a multiplexer 31, and the filters 21 and 22 constitute a multiplexer 32.

According to the above-described structures of the high-frequency module 1C and the antenna module 5C, (1) individual transmission of a signal of the first communication band, (2) individual transmission of a signal of the second communication band, (3) individual transmission of a signal of the third communication band, (4) individual transmission of a signal of the fourth communication band, (5) simultaneous transmission of a signal of the first communication band and a signal of the second communication band, and (6) simultaneous transmission of a signal of the third communication band and a signal of the fourth communication band can be performed.

Here, as shown in fig. 6, the frequency interval between the first frequency band (first communication band) and the third frequency band (third communication band) is smaller than the frequency interval between the first frequency band (first communication band) and the second frequency band (second communication band). In addition, the frequency interval between the second frequency band (second communication band) and the third frequency band (third communication band) is smaller than the frequency interval between the first frequency band (first communication band) and the second frequency band (second communication band). In addition, the frequency interval between the fourth frequency band (fourth communication band) and the first frequency band (first communication band) is smaller than the frequency interval between the fourth frequency band (fourth communication band) and the third frequency band (third communication band). In addition, the frequency interval between the third frequency band (third communication band) and the first frequency band (first communication band) is smaller than the frequency interval between the fourth frequency band (fourth communication band) and the third frequency band (third communication band).

Thus, for example, there is a concern that: in the case of transmitting the signal of the first communication band alone, the signal of the first communication band leaks to a signal path transmitting the signal of the third communication band and a signal path transmitting the signal of the fourth communication band, and in the case of transmitting the signal of the second communication band alone, the signal of the second communication band leaks to a signal path transmitting the signal of the third communication band. In addition, there is a concern that: in the case of separately transmitting a signal of the third communication band, the signal of the third communication band leaks to a signal path transmitting the signal of the first communication band and a signal path transmitting the signal of the second communication band, and there is a concern that: in the case of transmitting a signal of the fourth communication band alone, the signal of the fourth communication band leaks to a signal path transmitting the signal of the first communication band. In addition, there is a concern that: in the case of simultaneously transmitting a signal of the first communication band and a signal of the second communication band, the signal of the first communication band and the signal of the second communication band leak to a signal path on which a signal of the third communication band is transmitted. In addition, there is a concern that: in the case of simultaneously transmitting a signal of the third communication band and a signal of the fourth communication band, the signal of the third communication band and the signal of the fourth communication band leak to a signal path on which the signal of the first communication band is transmitted.

In contrast, according to the high-frequency module 1C of the present embodiment, the filters 11 and 12 are connected to the selection terminal 47b of the switch 47, and the filters 21 and 22 are connected to the selection terminal 47C of the switch 47. That is, since the filter 11 and the filter 21 are not connected at the same time by the exclusive connection of the switch 47, a high isolation degree between the filter 11 and the filter 21 can be ensured. Since the filter 12 and the filter 21 are not connected at the same time by exclusive connection of the switch 47, high isolation between the filter 12 and the filter 21 can be ensured. In addition, since the filter 11 and the filter 22 are not connected at the same time by exclusive connection of the switch 47, high isolation between the filter 11 and the filter 22 can be ensured. In addition, since the filter 12 and the filter 22 are not connected at the same time by the exclusive connection of the switch 47, a high isolation degree between the filter 12 and the filter 22 can be ensured.

Therefore, in the case of transmitting the signal of the first communication band alone, a high degree of isolation is ensured between the signal path through which the signal of the first communication band is transmitted and the signal path through which the signal of the third communication band is transmitted, and low-loss transmission can be achieved. In addition, in the case of transmitting the signal of the second communication band alone, high isolation is ensured between the signal path transmitting the signal of the second communication band and the signal path transmitting the signal of the third communication band, and low-loss transmission can be achieved. In addition, when the signal of the third communication band is transmitted alone, high isolation is ensured between the signal path through which the signal of the third communication band is transmitted and the signal path through which the signal of the first communication band is transmitted and the signal path through which the signal of the second communication band is transmitted, and low-loss transmission can be achieved. In addition, when the signal of the fourth communication band is transmitted alone, high isolation between the signal path through which the signal of the first communication band is transmitted and the signal path through which the signal of the fourth communication band is transmitted is ensured, and low-loss transmission can be achieved. In addition, in the case of simultaneously transmitting a signal of the first communication band and a signal of the second communication band, high isolation is ensured between a signal path through which the signal of the first communication band is transmitted, a signal path through which the signal of the second communication band is transmitted, and a signal path through which the signal of the third communication band is transmitted, and low-loss transmission can be achieved. In addition, in the case of simultaneously transmitting the signal of the third communication band and the signal of the fourth communication band, high isolation is ensured between the signal path for transmitting the signal of the third communication band and the signal path for transmitting the signal of the fourth communication band and the signal path for transmitting the signal of the first communication band, and low-loss transmission can be achieved.

In the high-frequency module 1B according to embodiment 3 and the high-frequency module 1C according to embodiment 4, the filters 11, 12, 21, and 22 may be disposed on the same substrate or in the same package. The high-frequency circuits 10 and 20B may be disposed on the same substrate or in the same package.

This makes it possible to reduce the size of the high-frequency modules 1B and 1C.

In the high-frequency module 1B according to embodiment 3 and the high-frequency module 1C according to embodiment 4, the filters 11 and 12 and the filters 21 and 22 may be disposed on different substrates or in different packages. The high-frequency circuits 10 and 20B may be disposed on different substrates or in different packages.

Accordingly, the isolation between the signal path of the first communication band and the signal path of the second communication band and the signal path of the third communication band and the signal path of the fourth communication band can be further improved.

In the high-frequency module 1B according to embodiment 3 and the high-frequency module 1C according to embodiment 4, for example, the first frequency band may include any one of 3300MHz to 4200MHz and 3300MHz to 3800MHz, the second frequency band may include any one of 5150MHz to 5850MHz and 5150MHz to 7125MHz, the third frequency band may include 4400MHz to 5000MHz, and the fourth frequency band may include 1700MHz to 2700 MHz. In this case, for example, as the first communication band, n77 or n78 of 5G-NR is applied, as the second communication band, WLAN or NR-U (5.15GHz-7.125GHz band) is applied, as the third communication band, n79 or n78 of 5G-NR is applied, as the fourth communication band, any of n1 (transmission band: 1920MHz-1980MHz, reception band: 2110MHz-2170MHz), n3 (transmission band: 1710MHz-1785MHz, reception band: 1805MHz-1880MHz), and n41(2496MHz-2690MHz) of 5G-NR is applied.

Accordingly, for example, in the case of simultaneously transmitting the fourth communication band (n 41 of 5G-NR) and the second communication band (WLAN), the frequency (5200MHz) of the 2 nd harmonic of the transmission signal (e.g., the center frequency 2600MHz) of n41 of 5G-NR is included in the frequency band (5.15GHz-7.125GHz band) of the WLAN. In contrast, in the high-frequency module 1B according to embodiment 3, the high isolation between the filter 12 that passes the signal of the second communication band and the filter 22 that passes the signal of the fourth communication band is ensured by the 2 antennas 2A and 2B. Therefore, the 2 nd harmonic of the transmission signal of n41 of 5G-NR can be suppressed from flowing into the signal path in which the filter 22 is disposed. Therefore, deterioration of the signal quality of the transmission signal of the WLAN can be suppressed, and degradation of the reception sensitivity of the WLAN can be suppressed.

In addition, for example, in the case where the fourth communication band (n 1 of 5G-NR) and the first communication band (n 77 of 5G-NR) are simultaneously transmitted, the frequency (3900MHz) of the 2 nd harmonic of the transmission signal (for example, the center frequency 1950MHz) of n1 of 5G-NR is included in the frequency band (3300MHz-4200MHz) of n77 of 5G-NR. In contrast, in the high-frequency module 1B according to embodiment 3, the 2 antennas 2A and 2B ensure high isolation between the filter 11 that passes the signal of the first communication band and the filter 22 that passes the signal of the fourth communication band. Therefore, the 2 nd harmonic of the transmission signal of n1 of 5G-NR can be suppressed from flowing into the signal path in which the filter 11 is arranged. Therefore, it is possible to suppress the deterioration of the signal quality of the transmission signal of n77 of 5G-NR and to suppress the decrease of the reception sensitivity of n77 of 5G-NR.

In addition, for example, in the case of simultaneous transmission of the second communication band (WLAN) and the third communication band (n 79 of 5G-NR), 3-order intermodulation distortion (2f2-f1) of the transmission signal of n79 of 5G-NR (e.g., center frequency f1MHz) and the transmission signal of WLAN (e.g., center frequency f2MHz) is contained in the frequency band (5150MHz-7125MHz) of the WLAN. In contrast, in the high-frequency module 1B according to embodiment 3, the 2 antennas 2A and 2B ensure high isolation between the filter 12 that passes the signal in the second communication band and the filter 21 that passes the signal in the third communication band. Therefore, the 3 rd order intermodulation distortion can be suppressed from flowing into the signal path in which the filter 12 is disposed. Therefore, deterioration of the signal quality of the transmission signal of the WLAN can be suppressed, and degradation of the reception sensitivity of the WLAN can be suppressed.

In addition, for example, in the case where the first communication band (n 77 of 5G-NR) and the fourth communication band (n 41 of 5G-NR) are simultaneously transmitted, 3-order intermodulation distortion (2f2-f1) of a transmission signal of n77 of 5G-NR (for example, a center frequency f2MHz) and a transmission signal of n41 of 5G-NR (for example, a center frequency f1MHz) is contained in a band (3300MHz-4200MHz) of n77 of 5G-NR. In contrast, in the high-frequency module 1B according to embodiment 3, the 2 antennas 2A and 2B ensure high isolation between the filter 11 that passes the signal of the first communication band and the filter 22 that passes the signal of the fourth communication band. Therefore, the 3 rd order intermodulation distortion can be suppressed from flowing into the signal path in which the filter 11 is disposed. Therefore, it is possible to suppress the deterioration of the signal quality of the transmission signal of n77 of 5G-NR and to suppress the decrease of the reception sensitivity of n77 of 5G-NR.

In the high-frequency module 1B according to embodiment 3 and the high-frequency module 1C according to embodiment 4, for example, the first frequency band may be 4400MHz to 5000MHz, the second frequency band may be 5925MHz to 7125MHz, the third frequency band may be 5150MHz to 5850MHz, and the fourth frequency band may be 3300MHz to 4200MHz or 3300MHz to 3800 MHz. In this case, for example, as the first communication band, n79 of 5G-NR is applied, as the second communication band, a WLAN6GHz band (5935MHz-7125MHz) or NR-U is applied, as the third communication band, a WLAN5GHz band (5150MHz-5725MHz) or NR-U is applied, and as the fourth communication band, n77 or n78 of 5G-NR is applied.

Further, the WLAN5GHz band and the WLAN6GHz band comply with IEEE802.11 which is a wireless LAN standard.

Accordingly, for example, in the case of simultaneously transmitting the second communication band (WLAN6GHz band) and the fourth communication band (n 78 of 5G-NR), the frequency (6600MHz) of the 2 nd harmonic of the transmission signal (e.g., the center frequency 3300MHz) of n78 of 5G-NR is included in the frequency band (5935MHz-7125MHz) of the WLAN6GHz band. In contrast, in the high-frequency module 1B according to embodiment 3, the high isolation between the filter 12 that passes the signal of the second communication band and the filter 22 that passes the signal of the fourth communication band is ensured by the 2 antennas 2A and 2B. Therefore, the 2 nd harmonic of the transmission signal of n78 of 5G-NR can be suppressed from flowing into the signal path in which the filter 12 is arranged. Therefore, deterioration of the signal quality of the transmission signal in the WLAN6GHz band can be suppressed, and degradation of the reception sensitivity in the WLAN6GHz band can be suppressed.

In addition, for example, in the case where the first communication band (n 79 of 5G-NR) and the third communication band (WLAN5GHz band) are transmitted simultaneously, 3-order intermodulation distortion (2f2-f1) of a transmission signal of n79 of 5G-NR (for example, a center frequency f1MHz) and a transmission signal of WLAN5GHz band (for example, a center frequency f2MHz) is included in a band (5150MHz-5725MHz) of the WLAN5GHz band. In contrast, in the high-frequency module 1B according to embodiment 3, the high isolation between the filter 11 that passes the signal in the first communication band and the filter 21 that passes the signal in the third communication band is ensured by the 2 antennas 2A and 2B. Therefore, the 3 rd order intermodulation distortion can be suppressed from flowing into the signal path in which the filter 21 is disposed. Therefore, deterioration of the signal quality of the transmission signal in the WLAN5GHz band can be suppressed, and degradation of the reception sensitivity in the WLAN5GHz band can be suppressed.

(embodiment 5)

The high-frequency module 1C according to embodiment 4 has a circuit configuration for transmitting signals in the first to fourth communication bands, but the high-frequency module 1D according to this embodiment has a configuration in which a circuit for transmitting a signal in the fifth communication band is further added.

Fig. 9 is a circuit configuration diagram of the high-frequency module 1D and the antenna module 5D according to embodiment 5.

The antenna module 5D includes the antenna 2 and the high-frequency module 1D. The antenna module 5D according to the present embodiment is different from the antenna module 5C according to embodiment 4 in that: circuit connection structures of the high-frequency circuits 10D and 20D; and a filter 23 is added to the high-frequency circuit 20D. Next, the antenna module 5D and the high-frequency module 1D according to the present embodiment are not described in the same manner as the antenna module 5C and the high-frequency module 1C according to embodiment 4, and different aspects will be mainly described.

The antenna 2 is connected to the switch 47 of the high-frequency module 1C, and radiates and transmits a high-frequency signal output from the high-frequency circuit 10D or 20D, and receives a high-frequency signal from the outside and outputs the high-frequency signal to the high-frequency circuit 10D or 20D.

As shown in fig. 9, the high-frequency module 1D includes an antenna connection terminal 100, high-frequency circuits 10D and 20D, and a switch 47.

As shown in fig. 9, one end of each of the filters 11 and 12 is connected to the selection terminal 47b, and one end of each of the filters 21 to 23 is connected to the selection terminal 47 c. The filters 11 and 12 constitute a multiplexer 31, and the filters 21, 22 and 23 constitute a multiplexer 33.

The high-frequency circuit 10D includes filters 11 and 12, power amplifiers 51T and 52T, low-noise amplifiers 51R and 52R, and switches 48 and 49. The high-frequency circuit 20D includes filters 21, 22, and 23, a power amplifier 53T, a low-noise amplifier 53R, and a switch 43.

The filter 23 is an example of a fifth filter, and is a high-frequency filter having a passband in a fifth frequency band including a fifth communication band, which is connected to the selection terminal 47 c.

According to the above-described structures of the high-frequency module 1D and the antenna module 5D, it is possible to perform (1) individual transmission of a signal of the first communication band, (2) individual transmission of a signal of the second communication band, (3) individual transmission of a signal of the third communication band, (4) individual transmission of a signal of the fourth communication band, (5) individual transmission of a signal of the fifth communication band, (6) simultaneous transmission of a signal of the first communication band and a signal of the second communication band, (7) simultaneous transmission of a signal of the third communication band and a signal of the fourth communication band, (8) simultaneous transmission of a signal of the third communication band and a signal of the fifth communication band, (9) simultaneous transmission of a signal of the fourth communication band and a signal of the fifth communication band, (10) simultaneous transmission of a signal of the third communication band and a signal of the fourth communication band and a signal of the fifth communication band.

Fig. 10 is a diagram showing a frequency relationship of pass bands of the filters constituting the high-frequency module 1D according to embodiment 5. In the figure, the first communication band, the second communication band, the third communication band, the fourth communication band, and the fifth communication band, and the frequency relationship of the filters 11, 12, 21, 22, and 23 are shown. In the present embodiment, the fourth communication band, the first communication band, the third communication band, the second communication band, and the fifth communication band are provided in this order from the low frequency side. According to this relationship, a fourth frequency band including a fourth communication band, a first frequency band including the first communication band, a third frequency band including the third communication band, a second frequency band including the second communication band, and a fifth frequency band including the fifth communication band are also provided in this order from the low frequency side. In other words, the third frequency band is located between the first frequency band and the second frequency band. The third frequency band may overlap with the first frequency band and the second frequency band, as long as at least a part of the third frequency band is located between the first frequency band and the second frequency band. The fourth frequency band is located on the lower frequency side than the first frequency band. The fourth frequency band may overlap with the first frequency band. The fifth frequency band is located on the higher frequency side than the second frequency band. The fifth frequency band may overlap with the second frequency band. Correspondingly, at least a part of the pass band of the filter 21 is located between the pass band of the filter 11 and the pass band of the filter 12. The passband of the filter 22 is located on the lower frequency side than the passband of the filter 11. The passband of the filter 23 is located on the higher frequency side than the passband of the filter 12.

According to the high-frequency module 1D of the present embodiment, the filters 11 and 12 are connected to the selection terminal 47b of the switch 47, and the filters 21, 22, and 23 are connected to the selection terminal 47c of the switch 47. That is, since the filter 11 and the filter 21 are not connected at the same time by the exclusive connection of the switch 47, a high isolation degree between the filter 11 and the filter 21 can be ensured. Since the filter 12 and the filter 21 are not connected at the same time by exclusive connection of the switch 47, high isolation between the filter 12 and the filter 21 can be ensured. In addition, since the filter 11 and the filter 22 are not connected at the same time by exclusive connection of the switch 47, high isolation between the filter 11 and the filter 22 can be ensured. In addition, since the filter 12 and the filter 22 are not connected at the same time by the exclusive connection of the switch 47, a high isolation degree between the filter 12 and the filter 22 can be ensured. In addition, since the filter 11 and the filter 23 are not connected at the same time by exclusive connection of the switch 47, high isolation between the filter 11 and the filter 23 can be ensured. In addition, since the filter 12 and the filter 23 are not connected at the same time by the exclusive connection of the switch 47, a high isolation degree between the filter 12 and the filter 23 can be ensured.

Therefore, in the case of transmitting the signal of the fifth communication band alone, a high degree of isolation is ensured between the signal path through which the signal of the fifth communication band is transmitted and the signal path through which the signal of the first communication band is transmitted, and low-loss transmission can be achieved. In addition, in the case of simultaneously transmitting the signal of the third communication band, the signal of the fourth communication band, and the signal of the fifth communication band, high isolation is ensured between the signal path through which the signal of the third communication band is transmitted, the signal path through which the signal of the fourth communication band is transmitted, and the signal path through which the signal of the fifth communication band is transmitted, and the signal path through which the signal of the first communication band is transmitted, and low-loss transmission can be achieved.

In the high-frequency module 1D according to embodiment 5, for example, n77 or n78 of 5G-NR is applied as the first communication band, WLAN (5150MHz or higher) is applied as the second communication band, n79 of 5G-NR is applied as the third communication band, n78 of 5G-NR is applied as the fourth communication band, and WLAN (5470MHz or higher) is applied as the fifth communication band.

Next, circuit components other than the filters of the high-frequency circuits 10D and 20D are described.

The power amplifier 51T is a transmission amplifier capable of amplifying a transmission signal of a first frequency band including the first communication band and a transmission signal of a fourth frequency band including the fourth communication band. The input terminal of the power amplifier 51T is connected to the transmission input terminal 110. The low noise amplifier 51R is a reception amplifier capable of amplifying a reception signal of a first frequency band including a first communication band and a reception signal of a fourth frequency band including a fourth communication band. The output terminal of the low noise amplifier 51R is connected to the reception output terminal 120.

The power amplifier 53T is a transmission amplifier that amplifies a transmission signal of a third frequency band including a third communication band. The input terminal of the power amplifier 53T is connected to the transmission input terminal 210. The low noise amplifier 53R is a reception amplifier that amplifies a reception signal of a third frequency band including a third communication band. The output terminal of the low noise amplifier 53R is connected to the reception output terminal 220.

The switch 43 has a common terminal 43a and selection terminals 43b and 43c, and exclusively switches between connecting the common terminal 43a to the selection terminal 43b and connecting the common terminal 43a to the selection terminal 43 c. The common terminal 43a is connected to the other end of the filter 21, the selection terminal 43b is connected to the output terminal of the power amplifier 53T, and the selection terminal 43c is connected to the input terminal of the low noise amplifier 53R. By the switching operation of the switch 43, the high-frequency circuit 20D transmits the transmission signal of the third communication band and the reception signal of the third communication band in a time-division manner.

The switch 48 is an example of a second switch, and includes a common terminal 48a, a selection terminal 48b (third selection terminal), 48c (fourth selection terminal), 48d (fifth selection terminal), and 48e (fifth selection terminal). The selection terminal 48b is connected to the filter 11, the selection terminal 48c is connected to the filter 22, the selection terminal 48d is connected to the output terminal of the power amplifier 51T, and the selection terminal 48e is connected to the input terminal of the low noise amplifier 51R. The switch 48 switches between connecting the common terminal 48a with the selection terminal 48b and connecting the common terminal 48a with the selection terminal 48c, and switches between connecting the common terminal 48a with the selection terminal 48d and connecting the common terminal 48a with the selection terminal 48 e. According to this connection configuration, the switch 48 switches between connecting the filter 11 to the power amplifier 51T and connecting the filter 22 to the power amplifier 51T, and switches between connecting the filter 11 to the low noise amplifier 51R and connecting the filter 22 to the low noise amplifier 51R. The switch 48 is, for example, a switching circuit of: the switch includes an SPDT type sub-switch having a common terminal 48a and selection terminals 48b and 48c, and an SPDT type sub-switch having a common terminal 48a and selection terminals 48d and 48e, and the common terminals 48a of the 2 sub-switches are connected to each other.

The switch 49 has a common terminal 49a, selection terminals 49b, 49c, 49d, and 49 e. The selection terminal 49b is connected to the filter 12, the selection terminal 49c is connected to the filter 23, the selection terminal 49d is connected to the output terminal of the power amplifier 52T, and the selection terminal 49e is connected to the input terminal of the low noise amplifier 52R. The switch 49 switches between connecting the common terminal 49a and the selection terminal 49b and connecting the common terminal 49a and the selection terminal 49c, and switches between connecting the common terminal 49a and the selection terminal 49d and connecting the common terminal 49a and the selection terminal 49 e. According to this connection configuration, switch 49 exclusively switches between connecting filter 12 to power amplifier 52T and connecting filter 23 to power amplifier 52T, and exclusively switches between connecting filter 12 to low noise amplifier 54R and connecting filter 23 to low noise amplifier 54R. The switch 49 is, for example, a switching circuit of: the switch includes an SPDT type sub-switch having a common terminal 49a and selection terminals 49b and 49c, and an SPDT type sub-switch having a common terminal 49a and selection terminals 49d and 49e, and the common terminals 49a of the 2 sub-switches are connected to each other.

Fig. 11A is a circuit configuration diagram showing a first connection state of the high-frequency module 1D according to embodiment 5. As shown in the drawing, in the switch 47, (1) individual transmission of a signal of the first communication band, (2) individual transmission of a signal of the second communication band, or (6) simultaneous transmission of a signal of the first communication band and a signal of the second communication band is performed in a case where the common terminal 47a and the selection terminal 47b are connected. In the case of (1) above, the common terminal 48a and the selection terminal 48b are connected. In the case of (2) above, the common terminal 49a and the selection terminal 49b are connected. In the case of (6) above, the common terminal 48a and the selection terminal 48b are connected, and the common terminal 49a and the selection terminal 49b are connected.

According to the first connection state, for example, when n79 of 5G-NR is not used, the multiplexer 31 is used to simultaneously transmit the high frequency signal of n77 or n78 of 5G-NR and the high frequency signal of WLAN (5150MHz or more). In addition, at this time, n78, which is 5G-NR of the fourth communication band, can also be used.

Fig. 11B is a circuit configuration diagram showing a second connection state of the high-frequency module 1D according to embodiment 5. As shown in the drawing, in the switch 47, in the case where the common terminal 47a and the selection terminal 47c are connected, (3) individual transmission of a signal of the third communication band, (4) individual transmission of a signal of the fourth communication band, (5) individual transmission of a signal of the fifth communication band, (7) simultaneous transmission of a signal of the third communication band and a signal of the fourth communication band, (8) simultaneous transmission of a signal of the third communication band and a signal of the fifth communication band, (9) simultaneous transmission of a signal of the fourth communication band and a signal of the fifth communication band, (10) simultaneous transmission of a signal of the third communication band and a signal of the fourth communication band and a signal of the fifth communication band are performed. In the cases of (4) and (7) above, the common terminal 48a and the selection terminal 48c are connected. In the cases of (5) and (8) above, the common terminal 49a and the selection terminal 49c are connected. In the cases of (9) and (10) described above, the common terminal 48a and the selection terminal 48c are connected, and the common terminal 49a and the selection terminal 49c are connected.

According to the second connection state, for example, when n79 of 5G-NR is used, the multiplexer 33 is used to simultaneously transmit the high frequency signal of n79 of 5G-NR, the high frequency signal of n78 of 5G-NR, and the high frequency signal of WLAN (5470MHz or more).

The filters 21, 22, and 23 constituting the multiplexer 33 may be single-chip LC filters. The multiplexer 33 may be a single-chip LC triplexer. The multiplexer 33 may be configured by a single-chip LC diplexer and a single-chip LC filter.

The multiplexer 33 may have a structure as shown in fig. 12, for example.

Fig. 12 is a circuit configuration diagram of a high-frequency module 1E according to a modification of embodiment 5. As shown in the drawing, the high-frequency module 1E according to the present modification may include a first diplexer formed by the filters 21 and 24 and a second diplexer formed by the filters 25 and 26 instead of the multiplexer 33 included in the high-frequency module 1D. One end of the filter 21 and one end of the filter 24 are connected to the selection terminal 47c, the other end of the filter 24 is connected to one end of the filter 25 and one end of the filter 26, the other end of the filter 25 is connected to the selection terminal 48c, and the other end of the filter 26 is connected to the selection terminal 49 c.

The filter 21 has a third frequency band including a third communication band as a passband, and the filter 24 has a fourth frequency band including a fourth communication band and a fifth frequency band including a fifth communication band as a passband. The filter 25 has a fourth frequency band including a fourth communication band as a passband, and the filter 26 has a fifth frequency band including a fifth communication band as a passband.

In addition, in the high-frequency module 1E according to the modification of embodiment 5, a high-frequency module having a configuration without the switch 47 is also included in the present invention. That is, the high-frequency module according to the present invention may include: an antenna connection terminal 100 and an antenna connection terminal 200 different from the antenna connection terminal 100; a filter 11 having a first frequency band including a first communication band for TDD as a pass band; a filter 12 having a second frequency band including a second communication band for TDD as a passband; a filter 21 having a third frequency band including a third communication band for TDD as a passband; a filter 22 having a fourth frequency band including a fourth communication band for TDD as a passband; and a filter 23 having a fifth frequency band including a fifth communication band for TDD as a passband, wherein the fourth frequency band is located on a lower frequency side than the first frequency band, the second frequency band, and the third frequency band, the fifth frequency band is located on a higher frequency side than the first frequency band, the second frequency band, the third frequency band, and the fourth frequency band, the filters 11 and 12 are connected to the antenna connection terminal 100, and the filters 21, 22, and 23 are connected to the antenna connection terminal 200.

Accordingly, the filter 11 and the filter 21 are not connected to the same antenna connection terminal, and therefore, a high degree of isolation between the filter 11 and the filter 21 can be ensured. In addition, since the filter 12 and the filter 21 are not connected to the same antenna connection terminal, a high degree of isolation between the filter 12 and the filter 21 can be ensured. In addition, since the filter 11 and the filter 22 are not connected to the same antenna connection terminal, a high degree of isolation between the filter 11 and the filter 22 can be ensured. In addition, since the filter 12 and the filter 22 are not connected to the same antenna connection terminal, a high degree of isolation between the filter 12 and the filter 22 can be ensured. In addition, since the filter 11 and the filter 23 are not connected to the same antenna connection terminal, a high isolation between the filter 11 and the filter 23 can be ensured. In addition, since the filter 12 and the filter 23 are not connected to the same antenna connection terminal, a high degree of isolation between the filter 12 and the filter 23 can be ensured.

(effects, etc.)

As described above, the high-frequency modules 1 and 1B include: an antenna connection terminal 100 and an antenna connection terminal 200 different from the antenna connection terminal 100; a filter 11 having a first band including a first communication band for TDD as a pass band; a filter 12 having a second band including a second communication band for TDD as a pass band; and a filter 21 having a third frequency band including a third communication band for TDD as a pass band, wherein at least a part of the third frequency band is located between the first frequency band and the second frequency band, the filters 11 and 12 are both connected to one of the antenna connection terminals 100 and 200, and the filter 21 is connected to the other of the antenna connection terminals 100 and 200.

According to the above configuration, since the filter 11 and the filter 21 are connected to different antennas, a high isolation can be ensured between the signal of the first communication band passing through the filter 11 and the signal of the third communication band passing through the filter 21. Further, since the filter 12 and the filter 21 are connected to different antennas, a high isolation between the signal of the second communication band passing through the filter 12 and the signal of the third communication band passing through the filter 21 can be ensured.

Therefore, a high isolation between 2 signals in the case of simultaneously transmitting the signal of the first communication band and the signal of the third communication band or in the case of simultaneously transmitting the signal of the second communication band and the signal of the third communication band is ensured, and low-loss transmission can be realized. In addition, transmission with low loss can be achieved also in the case of transmitting a signal of the first communication band alone, in the case of transmitting a signal of the second communication band alone, in the case of transmitting a signal of the third communication band alone, and in the case of transmitting a signal of the first communication band and a signal of the second communication band simultaneously.

The high-frequency module according to the modification of embodiment 1 may further include a switch 45, the switch 45 having common terminals 45a and 45b and selection terminals 45c and 45d, the common terminal 45a being exclusively connected to the selection terminal 45c or 45d, the common terminal 45b being exclusively connected to the selection terminal 45c or 45d, the common terminal 45a being connected to one of the antenna connection terminals 100 and 200, the common terminal 45b being connected to the other of the antenna connection terminals 100 and 200, the selection terminal 45c being connected to the filters 11 and 12, the selection terminal 45d being connected to the filter 21, the filters 11 and 12 being connected to one of the antenna connection terminals 100 and 200 via the selection terminal 45c, and the filter 21 being connected to the other of the antenna connection terminals 100 and 200 via the selection terminal 45 d.

Accordingly, since the filter 11 and the filter 21 are connected to different antennas, a high isolation between the signal of the first communication band passing through the filter 11 and the signal of the third communication band passing through the filter 21 can be ensured. Further, since the filter 12 and the filter 21 are connected to different antennas, a high isolation between the signal of the second communication band passing through the filter 12 and the signal of the third communication band passing through the filter 21 can be ensured.

The high-frequency module 1B according to embodiment 3 may further include a filter 22, the filter 22 being connected to the other of the antenna connection terminals 100 and 200, and having a fourth frequency band including a fourth communication band as a passband, the fourth frequency band being located on the low frequency side or the high frequency side of the first frequency band, the second frequency band, and the third frequency band.

Accordingly, since the filter 21 and the filter 11 are connected to different antennas, a high isolation between the signal of the third communication band passing through the filter 21 and the signal of the first communication band passing through the filter 11 can be ensured. Further, since the filter 21 and the filter 12 are connected to different antennas, a high isolation between the signal of the third communication band passing through the filter 21 and the signal of the second communication band passing through the filter 12 can be ensured. Since the filter 22 and the filter 11 are connected to different antennas, a high isolation can be ensured between the signal of the fourth communication band that passes through the filter 22 and the signal of the first communication band that passes through the filter 11. Since the filter 22 and the filter 12 are connected to different antennas, a high isolation can be ensured between the signal of the fourth communication band that passes through the filter 22 and the signal of the second communication band that passes through the filter 12.

Therefore, a high isolation between 2 signals is ensured in the case where the signal of the first communication band and the signal of the third communication band are simultaneously transmitted, the case where the signal of the first communication band and the signal of the fourth communication band are simultaneously transmitted, the case where the signal of the second communication band and the signal of the third communication band are simultaneously transmitted, or the case where the signal of the second communication band and the signal of the fourth communication band are simultaneously transmitted, and transmission with low loss can be achieved. In addition, in the case of transmitting a signal of the first communication band alone, in the case of transmitting a signal of the second communication band alone, in the case of transmitting a signal of the third communication band alone, in the case of transmitting a signal of the fourth communication band alone, in the case of transmitting a signal of the first communication band and a signal of the second communication band simultaneously, and in the case of transmitting a signal of the third communication band and a signal of the fourth communication band simultaneously, transmission with low loss can be realized.

The high-frequency modules 1 and 1B may further include an antenna 2A connected to the antenna connection terminal 100 and an antenna 2B connected to the antenna connection terminal 200.

The high-frequency module 1A according to embodiment 3 includes: an antenna connection terminal 100; a switch 40 having selection terminals 40b and 40c and a common terminal 40a connected to the antenna connection terminal 100, and exclusively switching between connection of the common terminal 40a to the selection terminal 40b and connection of the common terminal 40a to the selection terminal 40 c; a filter 11 connected to the selection terminal 40b and having a first band including a first communication band for TDD as a passband; a filter 12 connected to the selection terminal 40b and having a second frequency band including a second communication band for TDD as a passband; and a filter 21 connected to the selection terminal 40c, and having a third frequency band including a third communication band for TDD as a pass band, wherein at least a part of the third frequency band is located between the first frequency band and the second frequency band.

According to the above configuration, since the filter 11 and the filter 21 are not connected at the same time by exclusive connection of the switch 40, high isolation between the filter 11 and the filter 21 can be ensured. In addition, since the filter 12 and the filter 21 are not connected at the same time by the exclusive connection of the switch 40, a high isolation degree between the filter 12 and the filter 21 can be ensured.

Therefore, in the case of transmitting the signal of the first communication band alone, in the case of transmitting the signal of the second communication band alone, and in the case of transmitting the signal of the third communication band alone, transmission with low loss can be achieved. In addition, in the case of simultaneously transmitting a signal of the first communication band and a signal of the second communication band, high isolation is ensured between a signal path through which the signal of the first communication band is transmitted, a signal path through which the signal of the second communication band is transmitted, and a signal path through which the signal of the third communication band is transmitted, and low-loss transmission can be achieved.

The high-frequency module 1C according to embodiment 4 may further include a filter 22, and the filter 22 may be connected to the selection terminal 47C, and may have a fourth frequency band including a fourth communication band as a passband, the fourth frequency band being located on a low frequency side or a high frequency side of the first frequency band, the second frequency band, and the third frequency band.

Accordingly, since the filter 11 and the filter 22 are not connected at the same time by the exclusive connection of the switch 47, a high isolation degree between the filter 11 and the filter 22 can be ensured. In addition, since the filter 12 and the filter 22 are not connected at the same time by the exclusive connection of the switch 47, a high isolation degree between the filter 12 and the filter 22 can be ensured.

Therefore, in the case of transmitting the signal of the first communication band alone, in the case of transmitting the signal of the second communication band alone, in the case of transmitting the signal of the third communication band alone, and in the case of transmitting the signal of the fourth communication band alone, low-loss transmission can be achieved. In addition, in the case of simultaneously transmitting the signal of the third communication band and the signal of the fourth communication band, high isolation is ensured between the signal path for transmitting the signal of the third communication band and the signal path for transmitting the signal of the fourth communication band and the signal path for transmitting the signal of the first communication band, and low-loss transmission can be achieved.

The high-frequency modules 1A and 1C may further include an antenna 2 connected to the antenna connection terminal 100.

In addition, the high-frequency module 1D according to embodiment 5 may further include: a filter 23 connected to the selection terminal 47c and having a fifth frequency band including a fifth communication band as a passband; a power amplifier 51T capable of amplifying high-frequency signals of the first communication band and the fourth communication band; and a switch 48 having a selection terminal 48b connected to the filter 11, a selection terminal 48c connected to the filter 22, and a selection terminal 48d connected to the power amplifier 51T, and exclusively switching between connection of the selection terminal 48d to the selection terminal 48b and connection of the selection terminal 48d to the selection terminal 48c, wherein the fourth frequency band is located on the lower frequency side than the first frequency band, the second frequency band, and the third frequency band, and the fifth frequency band is located on the higher frequency side than the first frequency band, the second frequency band, the third frequency band, and the fourth frequency band.

The filters 11, 12, and 21 may be disposed on the same substrate or in the same package.

Accordingly, the high-frequency modules 1, 1A, 1B, and 1C can be miniaturized.

The filters 11 and 12 and the filter 21 may be disposed on different substrates or in different packages.

Accordingly, the isolation between the signal path of the first communication band and the signal path of the second communication band and the signal path of the third communication band can be further improved.

The communication device 6 includes any one of the high-frequency modules 1, 1A, 1B, and 1C and an RFIC 3 that processes a high-frequency signal transmitted by the high-frequency module.

This makes it possible to provide the communication device 6 that realizes low-loss transmission of signals in the TDD communication band.

(other embodiments)

The high-frequency module and the communication device according to the present invention have been described above by referring to the embodiments and the modifications, but the present invention is not limited to the embodiments and the modifications. Other embodiments in which arbitrary components in the above-described embodiment and modifications are combined, modifications in which various modifications that can be made to the above-described embodiments by those skilled in the art are made without departing from the spirit and scope of the present invention, and various devices incorporating the high-frequency module and the communication device according to the present invention are also included in the present invention.

For example, in the multiplexer, the front-end circuit, and the communication device according to the above-described embodiments, examples, and modifications, matching elements such as inductors and capacitors, and switching circuits may be connected between circuit elements. The inductor may include a wiring inductance formed by a wiring connecting the circuit elements.

Each of the filters 11, 12, 21, and 22 according to the above-described embodiments and modifications is, for example, an elastic wave filter, an LC filter, or the like, and the filter structure is arbitrary. An elastic wave filter is a filter including an elastic wave resonator. In addition, the LC filter is defined as a filter of: the pass band of the LC filter is formed by 1 or more inductors and 1 or more capacitors. Accordingly, the LC filter may also include an elastic wave resonator for forming an attenuation pole existing outside the pass band.

Industrial applicability

The present invention is applicable to a multiplexer, a front-end circuit, and a communication device of a multiband system including a communication band of 5G-NR, and can be widely used in communication devices such as mobile phones.