阅读说明：本技术 一种双波段切换的宽带上变频装置 (Broadband up-conversion device for dual-band switching ) 是由 侯健宏 封旭旭 厚科帆 于 2021-08-03 设计创作，主要内容包括：本发明的一个实施例公开了一种双波段切换的宽带上变频装置,包括：第一本振信号单元、第二本振信号单元、变频单元、频率选择单元、功率放大单元、和开关选通单元,其中所述变频单元用于将中频信号与第一本振信号单元产生的第一本振信号和第二本振信号单元产生的第二本振信号进行两次变频,产生宽带上变频信号；所述频率选择单元用于将变频后的宽带高频信号进行选频滤波,分为两个不同波段的高频信号；功率放大单元用于将所述不同波段的高频信号进行功率放大,以弥补变频链路中的功率损耗；开关选通单元用于通过控制信号切换所述不同波段的高频信号的输出通道。(One embodiment of the present invention discloses a broadband up-conversion device for dual-band switching, which comprises: the frequency conversion unit is used for carrying out frequency conversion on the intermediate frequency signal, a first local oscillation signal generated by the first local oscillation signal unit and a second local oscillation signal generated by the second local oscillation signal unit for two times to generate a broadband upper frequency conversion signal; the frequency selection unit is used for carrying out frequency selection filtering on the frequency-converted broadband high-frequency signal and dividing the frequency-converted broadband high-frequency signal into two high-frequency signals with different wave bands; the power amplification unit is used for performing power amplification on the high-frequency signals of different wave bands to make up for power loss in a frequency conversion link; and the switch gating unit is used for switching the output channels of the high-frequency signals of different wave bands through control signals.)

1. A dual band switched wideband up-conversion device, comprising:

a first local oscillator signal unit, a second local oscillator signal unit, a frequency conversion unit, a frequency selection unit, a power amplification unit, and a switch gating unit

The frequency conversion unit is used for carrying out frequency conversion on the intermediate frequency signal and a first local oscillation signal generated by the first local oscillation signal unit and a second local oscillation signal generated by the second local oscillation signal unit twice to generate a broadband upper frequency conversion signal;

the frequency selection unit is used for carrying out frequency selection filtering on the frequency-converted broadband high-frequency signal and dividing the frequency-converted broadband high-frequency signal into two high-frequency signals with different wave bands;

the power amplification unit is used for performing power amplification on the high-frequency signals of different wave bands to make up for power loss in a frequency conversion link;

and the switch gating unit is used for switching the output channels of the high-frequency signals of different wave bands through control signals.

2. The apparatus of claim 1, further comprising: and the output power detection unit is used for monitoring the output power.

3. The apparatus of claim 1, wherein the frequency conversion unit comprises:

the first frequency conversion unit is used for mixing the input intermediate frequency signal with a second local oscillation signal, and generating an up-conversion dot frequency signal after filtering and amplifying;

and the second frequency conversion unit is used for mixing the up-conversion dot frequency signal generated by the first frequency conversion unit with the first local oscillation signal to generate a broadband up-conversion signal.

4. The apparatus of claim 3, wherein the first local oscillator signal unit comprises:

the first attenuator is used for processing the first input signal received by the first local oscillator signal unit and sending the first input signal to the first amplifier;

and the first amplifier is used for performing power amplification on the processed first input signal, generating a first local oscillation signal and sending the first local oscillation signal to the second frequency conversion unit.

5. The apparatus of claim 3, wherein the second local oscillator signal unit comprises:

the second attenuator is used for processing the second input signal received by the second local oscillator signal unit and sending the second input signal to the second amplifier;

and the second amplifier is used for performing power amplification on the processed second input signal, generating a second local oscillation signal and sending the second local oscillation signal to the first frequency conversion unit.

6. The apparatus of claim 1, wherein the frequency selection unit comprises:

the band-pass filter is used for processing the broadband up-conversion signal;

the low-pass filter is used for carrying out secondary filtering on the broadband up-conversion signal processed by the band-pass filter;

and the switch is used for switching the wave band of the broadband up-conversion signal after the second filtering.

7. The apparatus according to claim 3, wherein the power amplification unit comprises:

the first power amplifier is used for performing power amplification on the up-conversion dot frequency signal generated by the first frequency conversion unit;

the second power amplifier is used for carrying out power amplification on the broadband up-conversion signal generated by the second frequency conversion unit;

a third power amplifier for compensating power loss in the second frequency conversion unit and the switch gating unit and providing an input power to a fourth power amplifier;

and the fourth power amplifier is used for providing enough output power.

8. The apparatus according to claim 1, wherein the power detection unit comprises:

the coupler is used for coupling the output high-frequency signal into the detector for power detection;

the detector is used for detecting the high-frequency power entering the detector, outputting a linear voltage signal and feeding back the output power state.

Technical Field

The invention relates to the field of phased array radars. And more particularly, to a dual band switched wideband up-conversion apparatus.

Background

The up-conversion module is used in an excitation source component, is a core component in the radar system, and is used for generating various frequency signals required by the radar system, and the quality of the performance of the up-conversion module directly determines the stability and power of the radar system. The radar system has higher requirements on performance indexes such as frequency stability, spectrum purity and the like of the up-conversion module, and the module is required to keep stable operation for a long time in a special environment, so that the radar system is also a challenge on product reliability.

Disclosure of Invention

In view of the above, a first embodiment of the present invention provides a dual-band switched wideband up-conversion apparatus, which includes:

a first local oscillator signal unit, a second local oscillator signal unit, a frequency conversion unit, a frequency selection unit, a power amplification unit, and a switch gating unit

The frequency conversion unit is used for carrying out frequency conversion on the intermediate frequency signal and a first local oscillation signal generated by the first local oscillation signal unit and a second local oscillation signal generated by the second local oscillation signal unit twice to generate a broadband upper frequency conversion signal;

the frequency selection unit is used for carrying out frequency selection filtering on the frequency-converted broadband high-frequency signal and dividing the frequency-converted broadband high-frequency signal into two high-frequency signals with different wave bands;

the power amplification unit is used for performing power amplification on the high-frequency signals of different wave bands to make up for power loss in a frequency conversion link;

and the switch gating unit is used for switching the output channels of the high-frequency signals of different wave bands through control signals.

In a specific embodiment, the apparatus further comprises: and the output power detection unit is used for monitoring the output power.

In a specific embodiment, the frequency conversion unit includes:

the first frequency conversion unit is used for mixing the input intermediate frequency signal with a second local oscillation signal, and generating an up-conversion dot frequency signal after filtering and amplifying;

and the second frequency conversion unit is used for mixing the up-conversion dot frequency signal generated by the first frequency conversion unit with the first local oscillation signal to generate a broadband up-conversion signal.

In a specific embodiment, the first local oscillator signal unit includes:

the first attenuator is used for processing the first input signal received by the first local oscillator signal unit and sending the first input signal to the first amplifier;

and the first amplifier is used for performing power amplification on the processed first input signal, generating a first local oscillation signal and sending the first local oscillation signal to the second frequency conversion unit.

In a specific embodiment, the second local oscillator signal unit includes:

the second attenuator is used for processing the second input signal received by the second local oscillator signal unit and sending the second input signal to the second amplifier;

and the second amplifier is used for performing power amplification on the processed second input signal, generating a second local oscillation signal and sending the second local oscillation signal to the first frequency conversion unit.

In a specific embodiment, the frequency selection unit includes:

the band-pass filter is used for processing the broadband up-conversion signal;

the low-pass filter is used for carrying out secondary filtering on the broadband up-conversion signal processed by the band-pass filter;

and the switch is used for switching the wave band of the broadband up-conversion signal after the second filtering.

In a specific embodiment, in the power amplifying unit, the power amplifying unit includes:

the first power amplifier is used for performing power amplification on the up-conversion dot frequency signal generated by the first frequency conversion unit;

the second power amplifier is used for carrying out power amplification on the broadband up-conversion signal generated by the second frequency conversion unit;

a third power amplifier for compensating power loss in the second frequency conversion unit and the switch gating unit and providing an input power to a fourth power amplifier;

and the fourth power amplifier is used for providing enough output power.

In a specific embodiment, the power detection unit includes:

the coupler is used for coupling the output high-frequency signal into the detector for power detection;

the detector is used for detecting the high-frequency power entering the detector, outputting a linear voltage signal and feeding back the output power state.

The invention has the following beneficial effects:

according to the technical scheme, the low-frequency point frequency signal is up-converted into a broadband high-frequency signal through the two-stage up-conversion unit, the frequency selection unit, the power amplification unit and the switch gating unit, dual-band switching and dual-channel output are achieved, the frequency selection unit selects the SIP packaging device with high integration level, the module size is greatly reduced, and miniaturization is achieved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 shows a schematic diagram of a dual band switched wideband up-conversion device according to an embodiment of the present invention

Fig. 2 shows a schematic diagram of a frequency selection unit according to an embodiment of the invention.

Detailed Description

In order to make the technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In order to realize dual-band switching of frequency conversion signals and improve the purity of signal frequency spectrums, the method adopts a frequency selection unit and a frequency mixing-filtering-amplifying-filtering-frequency mixing-filtering-amplifying circuit to make input low-frequency point-frequency microwave signals pass through two-time up-conversion and frequency selection units and be up-converted into broadband dual-band high-frequency signals. And the miniaturization of the assembly is realized by adopting the technology of combining a silicon-based SIP packaging device and an MMIC.

In this embodiment, as shown in fig. 1, a dual-band switched wideband up-conversion apparatus includes:

a first local oscillator signal unit 100, a second local oscillator signal unit 101, a frequency conversion unit 103, a frequency selection unit A9, a power amplification unit 105 and a switch gating unit 106, wherein

The first local oscillator signal unit includes:

the first attenuator A3 is used for processing the first input signal received by the first local oscillator signal unit and sending the processed first input signal to the first amplifier;

and the first amplifier A4 is used for performing power amplification on the processed first input signal, generating a first local oscillation signal and sending the first local oscillation signal to the second frequency conversion unit.

The second local oscillator signal unit includes:

the second attenuator A1 is used for processing a second input signal received by the second local oscillator signal unit and sending the second input signal to the second amplifier;

and the second amplifier A2 is used for performing power amplification on the processed second input signal, generating a second local oscillation signal and sending the second local oscillation signal to the first frequency conversion unit.

The output end of the first attenuator A3 is connected with the input end of the first amplifier A4, the first input signal is adjusted in power through the first attenuator A3 and then enters the first amplifier A4, and the amplifier A3 works in a P-1 state.

The output terminal of the second attenuator A1 is connected to the input terminal of the second amplifier A2, the second input signal is adjusted in power by the second attenuator A1, and then enters the second amplifier A2, and the amplifier A2 operates in the P-1 state.

The frequency conversion unit is used for carrying out frequency conversion on the intermediate frequency signal and a first local oscillation signal generated by the first local oscillation signal unit and a second local oscillation signal generated by the second local oscillation signal unit twice to generate a broadband upper frequency conversion signal;

in one embodiment, the frequency conversion unit includes:

a first frequency conversion unit comprising: the mixer A5 of the first frequency conversion unit, the band-pass filter A6 of the first frequency conversion unit and the amplifier A7 of the first frequency conversion unit mix the input intermediate frequency signal with the second local oscillation signal, and generate an up-conversion dot frequency signal after filtering and amplifying;

the second frequency conversion unit (mixer) A8 mixes the up-conversion dot frequency signal generated by the first frequency conversion unit with the first local oscillation signal to generate a broadband up-conversion signal.

The frequency selection unit (switch filter) A9 is used for performing frequency-selective filtering on the frequency-converted broadband high-frequency signal and dividing the frequency-converted broadband high-frequency signal into two high-frequency signals with different wave bands;

in one embodiment, as shown in fig. 2, the frequency selection unit includes:

the band-pass filter is used for processing the broadband up-conversion signal;

the low-pass filter is used for carrying out secondary filtering on the broadband up-conversion signal processed by the band-pass filter;

and the switch is used for switching the wave band of the broadband up-conversion signal after the second filtering.

The switches are divided into an input switch B1 and an output switch B6.

In a specific example, the input switch B1 of the frequency selection unit a9 is a three-port device, and the port is connected to the output terminal of the second stage frequency conversion unit, and the branch ports are respectively connected to the input terminals of the band-pass filter B2 and the band-pass filter B3. The output terminals of the band-pass filter B2 and the band-pass filter B3 are connected to the input terminals of the low-pass filter B4 and the low-pass filter B5, respectively. The output ends of the low-pass filter B4 and the low-pass filter B5 are respectively connected with the branch port of the output switch B6, and the sum port of the output switch B6 is connected with the input end of the power amplification unit. The band-pass filter B2 and the low-pass filter B4 are matched in one group, the band-pass filter B3 and the low-pass filter B5 are matched in one group, the output signal of the second-stage frequency conversion unit A8 is subjected to selective filtering and is divided into two wave bands, and the designated wave band signal is selected and output through the input switch B1 and the output switch B6.

A power amplification unit comprising: the amplifier A10 of the power amplifying unit, the attenuator A11 of the power amplifying unit, the amplifier A12 of the power amplifying unit, the attenuator A13 of the power amplifying unit and the amplifier A14 of the power amplifying unit are used for performing power amplification on the high-frequency signals of different wave bands to make up for power loss in a frequency conversion link;

in one embodiment, in the power amplifying unit, the power amplifying unit includes:

the first power amplifier is used for performing power amplification on the up-conversion dot frequency signal generated by the first frequency conversion unit;

the second power amplifier is used for carrying out power amplification on the broadband up-conversion signal generated by the second frequency conversion unit;

a third power amplifier for compensating power loss in the second frequency conversion unit and the switch gating unit and providing an input power to a fourth power amplifier;

and the fourth power amplifier is used for providing enough output power.

The input end of the amplifier A10 of the power amplification unit 1003 is connected with the output end of the frequency selection unit A9, and the output end of the amplifier A10 is connected with the input end of the attenuator A11. The output of attenuator A11 is connected to the input of amplifier A12, and the output of amplifier A12 is connected to the input of attenuator A13. The output of attenuator A13 is connected to the input of amplifier A14. Wherein. Amplifiers a10, a12, a14 are used to compensate for power loss in the frequency conversion chain, and attenuators a11, a13 are used to achieve matching between the two amplifiers.

And the switch gating unit comprises a switch A17, an attenuator A18, an isolator A19 and an isolator A20 and is used for switching the output channels of the high-frequency signals of different wave bands through control signals.

The input switch a17 of the switch gating unit 1005 is a three-port device, and is connected with the output terminal of the power detection unit 1004, and is connected with the input terminal of the attenuator a18 and the input terminal of the isolator a20, respectively, at its branch port. The input end of the isolator A19 is connected with the output end of the attenuator A18, the output end is the output end of the module, and the output end of the isolator A20 is the output end of the module.

In a preferred embodiment, the apparatus further comprises an output power detection unit 1007, an output power detection unit coupler a15, and an output power detection unit detector a16 for monitoring the output power.

In one embodiment, the power detection unit includes:

the coupler is used for coupling the output high-frequency signal into the detector for power detection;

the detector is used for detecting the high-frequency power entering the detector, outputting a linear voltage signal and feeding back the output power state.

The coupler of the output power detection unit is a four-port device, wherein the input end of the coupler is connected with the output end of the power amplification unit, the coupling end of the coupler is connected with the input end of a detector A16 of the output power detection unit, the isolation end of the coupler is connected with a 50 ohm resistor, and the output end of the coupler is connected with the input end of the switch gating unit. The coupler inputs the coupled microwave signals into the detector, and the detector outputs corresponding linear voltage according to the power of the received microwave signals, so that the power of the variable frequency link can be monitored in real time.

According to the technical scheme, a low-frequency point frequency signal is up-converted into a broadband high-frequency signal through a two-stage up-conversion unit, a frequency selection unit, a power amplification unit and a switch gating unit, output power is larger than 16dBm, in-band stray is larger than 60dBc, local oscillator leakage is larger than 60dBc, the on-off ratio of a switch is larger than 50dBc, dual-band switching and dual-channel output are achieved, wherein the frequency selection unit selects a SIP packaging device with high integration level, the size of a module is greatly reduced, and miniaturization is achieved.

It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.