阅读说明：本技术 通信模块 (Communication module ) 是由 横山仁 于 2018-05-31 设计创作，主要内容包括：通信模块(1)具备输入输出开关(105)、双工器(104)、发送滤波器(106)以及接收滤波器(107)。在双工器(104)中,在与第一方向正交的第二方向上,第二边(1042)配置在比第一边(1041)更远离输入输出开关(105)的位置。发送滤波器(106)以及接收滤波器(107)中的任意的一个滤波器在第一方向上与输入输出开关(105)相邻配置。(A communication module (1) is provided with an input/output switch (105), a duplexer (104), a transmission filter (106), and a reception filter (107). In the duplexer (104), in a second direction orthogonal to the first direction, the second side (1042) is disposed at a position farther from the input/output switch (105) than the first side (1041). Either one of the transmission filter (106) and the reception filter (107) is disposed adjacent to the input/output switch (105) in the first direction.)

1. A communication module is provided with:

an input/output switch for switching signal paths of a transmission signal and a reception signal for each frequency band;

a duplexer having a first side parallel to a first direction and a second side parallel to the first direction, and including a first switch terminal disposed on the first side, a first transmission terminal disposed on the second side, and a first reception terminal disposed on the second side, the duplexer outputting a signal of a first transmission frequency included in a first frequency band among first transmission signals input to the first transmission terminal, from the first switch terminal to the input/output switch, and outputting a signal of a first reception frequency included in the first frequency band among first reception signals input from the input/output switch to the first switch terminal, from the first reception terminal;

a transmission filter including a second switch terminal and a second transmission terminal, the transmission filter outputting a signal of a second transmission frequency included in a second frequency band among second transmission signals input to the second transmission terminal, from the second switch terminal to the input/output switch; and

a reception filter including a third switch terminal and a second reception terminal, the reception filter outputting a signal of a second reception frequency included in the second frequency band from the second reception terminal among second reception signals input from the input/output switch to the third switch terminal,

in the duplexer, the second side is disposed farther from the input/output switch than the first side in a second direction orthogonal to the first direction,

one of the transmission filter and the reception filter is disposed adjacent to the input/output switch in the first direction.

2. The communication module of claim 1,

the duplexer, the transmission filter, and the reception filter are each formed of a single chip.

3. The communication module of claim 1 or 2,

the other of the transmission filter and the reception filter is disposed in the second direction when viewed from the input/output switch.

4. The communication module of any one of claims 1 to 3,

the receiving filter is disposed on the opposite side of the transmitting filter as viewed from the duplexer.

5. The communication module of any one of claims 1 to 4,

the communication module further includes:

a transmission switch that outputs the first transmission signal to the first transmission terminal of the duplexer or outputs the second transmission signal to the second transmission terminal of the transmission filter; and

a reception switch that receives a signal of the first reception frequency from the first reception terminal of the duplexer or receives a signal of the second reception frequency from the second reception terminal of the reception filter,

the transmission filter and the transmission switch are arranged in the first direction when viewed from the input/output switch,

the reception filter and the reception switch are arranged in the second direction when viewed from the input/output switch.

6. The communication module of claim 5,

the transmission filter has a third side parallel to the second direction and a fourth side parallel to the second direction,

the second switch terminal is disposed on the third side,

the second transmission terminal is disposed on the fourth side,

the third side of the transmission filter is disposed adjacent to the input/output switch.

7. The communication module of claim 6,

the second transmission terminal is disposed at one end of the fourth side.

8. The communication module according to any one of claims 5 to 7,

the reception filter has a fifth side parallel to the first direction and a sixth side parallel to the first direction,

the third switch terminal is disposed on the fifth side,

the second receiving terminal is disposed on the sixth side,

in the reception filter, the sixth side is disposed farther from the input/output switch than the fifth side in the second direction.

9. The communication module of claim 8,

the second receiving terminal is disposed at one end of the sixth side.

10. The communication module according to any one of claims 1 to 9,

the communication module includes:

a reception switch that receives a signal of the first reception frequency from the first reception terminal of the duplexer or receives a signal of the second reception frequency from the second reception terminal of the reception filter; and

a low noise amplifier circuit for amplifying the signal transmitted from the receiving switch,

the duplexer is disposed between the input/output switch, the reception switch, and the low noise amplifier circuit.

11. The communication module according to any one of claims 1 to 10,

the duplexer is disposed in a second direction when viewed from the transmission filter.

12. The communication module of any one of claims 1 to 11,

the communication module further includes another duplexer, and the another duplexer is disposed in the second direction when viewed from the transmission filter.

13. The communication module of any one of claims 1 to 12,

the communication module further includes a matching circuit arrangement region adjacent to the input/output switch on a side opposite to a side adjacent to the one filter in the first direction.

Technical Field

The present invention relates to a communication module.

Background

In recent years, communication modules mounted on mobile communication terminals and the like are required to be capable of performing communication in a plurality of frequency bands, and the density of circuits is increased due to the miniaturization of mobile communication terminals. However, in a highly-densified communication module, isolation characteristics are degraded due to the proximity of transmission paths of a transmission signal and a reception signal.

For example, in a communication module disclosed in patent document 1, a transmission filter is disposed along a first side of a module substrate, and a reception filter is disposed along a second side of the module substrate facing the first side, thereby suppressing deterioration of isolation characteristics.

Patent document 1: international publication No. 2010/087307

However, in a communication module in which the number of discrete components is reduced by using a duplexer in which a transmission filter and a reception filter are integrated, it is not possible to separately dispose the transmission filter and the reception filter as disclosed in patent document 1. In other words, a communication module including a duplexer has a problem that deterioration of isolation characteristics cannot be suppressed.

Disclosure of Invention

The present invention has been made in view of such circumstances, and an object thereof is to provide a communication module capable of improving isolation characteristics.

A communication module according to an aspect of the present invention includes: an input/output switch for switching signal paths of a transmission signal and a reception signal for each frequency band; a duplexer having a first side and a second side parallel to the first direction, and including a first switch terminal disposed on the first side, a first transmission terminal disposed on the second side, and a first reception terminal disposed on the second side, the duplexer outputting, from the first switch terminal to the input/output switch, a signal of a first transmission frequency included in the first frequency band among first transmission signals input to the first transmission terminal, and outputting, from the first reception terminal, a signal of a first reception frequency included in the first frequency band among first reception signals input to the first switch terminal from the input/output switch; a transmission filter that outputs, from the second switch terminal to the input/output switch, a signal of a second transmission frequency included in the second frequency band, out of a second transmission signal input to the second transmission terminal; and a reception filter including a third switch terminal and a second reception terminal, the reception filter outputting, from the second reception terminal, a signal of a second reception frequency included in the second frequency band, out of the second reception signals input from the input/output switch to the third switch terminal. In the duplexer, the second side is disposed farther from the input/output switch than the first side in a second direction orthogonal to the first direction. Either one of the transmission filter and the reception filter is disposed adjacent to the input/output switch in the first direction.

According to the present invention, a communication module capable of improving isolation characteristics can be provided.

Drawings

Fig. 1 is a diagram showing an example of a circuit configuration of a communication module according to the present embodiment.

Fig. 2 is a diagram showing an example of arrangement of components of a communication module according to a comparative example.

Fig. 3 is a diagram showing an example of arrangement of components of the communication module according to the present embodiment.

Fig. 4 is a diagram for explaining the arrangement of the second transmission terminals in the transmission filter and the arrangement of the second reception terminals in the reception filter according to the present embodiment.

Fig. 5 is a diagram for explaining the arrangement of the second transmission terminals in the transmission filter and the arrangement of the second reception terminals in the reception filter according to the present embodiment.

Fig. 6 is a diagram for explaining the arrangement of the second transmission terminals in the transmission filter and the arrangement of the second reception terminals in the reception filter according to the present embodiment.

Fig. 7 is a graph showing a ratio of quantifying isolation characteristics of a transmission terminal and a reception terminal of a duplexer in a communication module according to a comparative example and a communication module according to the present embodiment.

Fig. 8 is a graph showing power for quantifying isolation characteristics of the transmission terminal and the reception terminal of the duplexer in the communication module according to the comparative example and the communication module according to the present embodiment.

Detailed Description

Preferred embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, elements to which the same reference numerals are attached have the same or similar configurations.