Multi-channel high-isolation low-power-consumption array receiving module

Abstract

The invention discloses a multi-channel high-isolation low-power-consumption array receiving module. A power supply and control circuit is connected with a local oscillator amplification power division circuit; the power supply and control circuit is used for converting an externally accessed power supply into a power supply voltage required by the receiving module, and controlling the receiving frequency conversion circuit through an external control instruction to realize the functions of amplitude control, band-pass filter group switching, polarization selection and the like; the receiving frequency conversion circuit comprises a plurality of receiving frequency conversion links, and each receiving frequency conversion link receives the first local oscillator signal and the second local oscillator signal sent by the local oscillator amplification power division circuit and is used for converting a radio frequency signal input into the receiving frequency conversion link into an intermediate frequency signal to be output; the local oscillator amplification power division circuit is used for dividing the local oscillator signal into a first local oscillator signal and a second local oscillator signal, and inputting the first local oscillator signal and the second local oscillator signal into the receiving frequency conversion link. The circuit has the advantages of high circuit integration degree, small size, compact structure, excellent performance, high reliability and the like.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a multi-channel high-isolation low-power array receiving module. Background Art

[0002] Most of the existing receiving modules are implemented using single frequency conversion and single local oscillator mode, which cannot meet the index requirements for in-band spurious suppression. Summary of the Invention

[0003] In view of this, the present application provides a multi-channel high-isolation low-power array receiving module.

[0004] The present application discloses a multi-channel high-isolation low-power array receiving module, which includes a receiving frequency conversion circuit, a power supply and control circuit, and a local oscillator amplifying and power dividing circuit; the receiving frequency conversion circuit is connected to the power supply and control circuit and the local oscillator amplifying and power dividing circuit respectively; the power supply and control circuit is connected to the local oscillator amplifying and power dividing circuit;

[0005] The power supply and control circuit is used to convert the external power supply into the power supply voltage required by the receiving module, and control the receiving frequency conversion circuit through external control instructions to achieve amplitude control, bandpass filter group switching, and polarization selection;

[0006] The receiving frequency conversion circuit includes M receiving frequency conversion chains, each receiving frequency conversion chain receives a first local oscillator signal and a second local oscillator signal sent by a local oscillator amplifying and power dividing circuit, and is used to convert the radio frequency signal input thereto into an intermediate frequency signal for output;

[0007] The local oscillator amplifying power dividing circuit is used to respectively divide the local oscillator signal into M first local oscillator signals and M second local oscillator signals, and input them into M receiving frequency conversion links respectively.

[0008] Furthermore, the structures and performances of the M receiving frequency conversion links are the same; each receiving frequency conversion link adopts a superheterodyne system, which has two radio frequency input ports, namely a vertical polarization port and a horizontal polarization port.

[0009] Furthermore, each receiving frequency conversion link includes two branches, a circular polarizer, a polarization selection switch, a first bandpass filter group, a first amplifier, a second amplifier, a first low-pass filter, a first mixer, a second bandpass filter, a first digitally controlled attenuator, a third amplifier, a third bandpass filter, a temperature compensator, a second low-pass filter, a fourth amplifier, a third low-pass filter, a second mixer, a fourth bandpass filter, a second digitally controlled attenuator, a fifth amplifier, a fifth bandpass filter, and a fourth low-pass filter;

[0010] The two branches are a first branch and a second branch; the first branch and the second branch have the same structure, both including a first limiter and a first low-noise amplifier connected in sequence;

[0011] The two first limiters in the two branches are connected to the vertical polarization port and the horizontal polarization port respectively, and the two first low-noise amplifiers are both connected to the circular polarizer;

[0012] The circular polarizer is connected to the first mixer via the polarization selection switch, the first bandpass filter group, the first amplifier in sequence; the second amplifier is connected to the first mixer via the first low-pass filter;

[0013] The first mixer is connected to the second mixer in sequence through the second bandpass filter, the first digitally controlled attenuator, the third amplifier, the third bandpass filter, the temperature compensator, the second low-pass filter, the fourth amplifier, and the third low-pass filter;

[0014] The fourth amplifier is connected to the second mixer via a third low-pass filter;

[0015] The second mixer is connected to the fourth low-pass filter via the fourth band-pass filter, the second digitally controlled attenuator, the fifth amplifier, the fifth band-pass filter and the fourth low-pass filter in sequence.

[0016] Furthermore, the vertical polarization port and the horizontal polarization port of each receiving frequency conversion link are respectively used to receive antenna signals;

[0017] The input end of the second amplifier is used to receive the first local oscillator signal sent by the frequency conversion circuit, and the output end is used to send the amplified first local oscillator signal to the first low-pass filter for filtering, and the filtered first local oscillator signal enters the first mixer;

[0018] The input end of the fourth amplifier is used to receive the second local oscillator signal sent by the frequency conversion circuit, and the output end is used to send the amplified second local oscillator signal to the third low-pass filter for filtering. The filtered second local oscillator signal enters the second mixer.

[0019] Furthermore, the antenna signal received by each receiving frequency conversion link is sequentially amplitude-limited by a first limiter, then de-noised and amplified by a first low-noise amplifier, and then formed into a circularly polarized signal by a circular polarizer. After the circularly polarized signal is selected by a polarization selection switch, it enters a first bandpass filter group for broadband filtering, enters a first amplifier for power amplification, and then enters a first mixer for mixing with the amplified and filtered first local oscillator signal to obtain a first mixed signal, completing up-conversion of the radio frequency signal and filtering of mixing spurious signals, local oscillator leakage, and second image frequencies. The circularly polarized signal includes a left-hand circularly polarized signal and a right-hand circularly polarized signal.

[0020] The first mixed signal is subjected to broadband filtering through a second band-pass filter to preselect the intermediate frequency signal and filter out the image frequency signal. The first mixed signal is then subjected to amplitude attenuation through a first digitally controlled attenuator, power amplified through a third amplifier, broadband filtered through a third band-pass filter, temperature compensated through a temperature compensator, filtered through a second low-pass filter, and then enters the second mixer.

[0021] The second mixer mixes the received signal to obtain a second mixed signal, completes the down-conversion and amplification of the intermediate frequency signal, and filters out mixing spurious and local oscillator leakage;

[0022] The second mixed signal is broadband filtered by the fourth bandpass filter, enters the fifth amplifier for power amplification, enters the fifth bandpass filter for broadband filtering, and enters the fourth low-pass filter for filtering to generate an intermediate frequency signal.

[0023] Furthermore, the local oscillator amplifying and power dividing circuit is divided into a first local oscillator amplifying and power dividing circuit and a second local oscillator amplifying and power dividing circuit; the first local oscillator amplifying and power dividing circuit and the second local oscillator amplifying and power dividing circuit have the same structure and are used to generate a first local oscillator signal and a second local oscillator signal respectively;

[0024] The first local oscillator amplifying power dividing circuit and the second local oscillator amplifying power dividing circuit each include a first attenuator, a second attenuator, a sixth amplifier, a fifth low-pass filter, and a power divider connected in sequence;

[0025] The external local oscillator signal is input into the first attenuator and the second attenuator in sequence for amplitude attenuation, and then amplified and filtered by the sixth amplifier and the fifth low-pass filter. The filtered local oscillator signal is amplified at the common end and then power-divided to ensure that the phase noise of the local oscillator signal is not affected.

[0026] Furthermore, the receiving module is divided into three modules based on channel function and structural layout: an RF front-end module, a first mixing module, and a second mixing module. The three modules are stacked and connected by blind plugging. There are N RF front-end modules in total, each corresponding to 2*N input signals, and the internal cavity of the RF front-end module isolates the 2*N signals. Each signal link in the first mixing module and the second mixing module is isolated by a spacer; M=N*N.

[0027] Furthermore, the radio frequency front-end module includes a first limiter, a first low noise amplifier, a circular polarizer, a polarization selection switch, a first bandpass filter group, and a first amplifier in each receiving frequency conversion link;

[0028] The first frequency mixing module includes a second amplifier, a first low-pass filter, a first frequency mixer, a second band-pass filter, a first digitally controlled attenuator, a third amplifier, a third band-pass filter, a temperature compensator, and a first local oscillator amplification and power division circuit in each receiving frequency conversion link;

[0029] The second frequency mixing module includes a second low-pass filter, a fourth amplifier, a third low-pass filter, a second frequency mixer, a fourth band-pass filter, a second digitally controlled attenuator, a fifth amplifier, a fifth band-pass filter, a fourth low-pass filter, a second local oscillator amplification and power division circuit, a power supply and a control circuit in each receiving frequency conversion link.

[0030] Furthermore, the power supply and control circuit includes a power conversion, a voltage and current detection circuit, a crystal oscillator, a temperature sensor, and a processor; the FPGA is connected to the power conversion, the voltage and current detection circuit, the filter circuit, the temperature sensor, and the crystal oscillator respectively;

[0031] The temperature sensor is used to measure the temperature in each receiving frequency conversion link. If the temperature is lower than the preset value, the temperature compensator is controlled to perform temperature compensation on the received signal.

[0032] The +12V power input is filtered by the filter circuit and then enters the power conversion, voltage, and current detection circuits. The voltage output by the power conversion, voltage, and current detection circuits is collected by the processor and calculated to obtain the operating current. The +12V power supply is converted by DC / DC to output +5.5V voltage. The +5.5V is converted by the low-dropout linear regulator (LDO) to output +5V to power the receiving frequency conversion link.

[0033] A crystal oscillator is used to provide a frequency reference for the processor.

[0034] Furthermore, the power supply and control circuit use SPI interface communication, the processor receives system commands, and controls the polarization selection switch in each receiving frequency conversion link and the amplitude attenuation of the signal according to the control protocol;

[0035] The device's operating current and input voltage are collected through power conversion, voltage, and current detection circuits and reported to the processor.

[0036] Due to the adoption of the above technical solution, the present application has the following advantages: the receiving module of the present application adopts a multi-frequency conversion method, using multiple local oscillator frequency conversion to effectively suppress in-band spurious signals and improve lateral detection accuracy; it has the advantages of high circuit integration, small size, compact structure, and high reliability. The present application mainly has the following capabilities.

[0037] a) Each channel in the module can realize functions such as limiting, amplification, filtering, down-conversion, amplitude control, and polarization switching;

[0038] b) Amplitude control, bandpass filter bank switching, polarization selection and other functions can be achieved through external control instructions;

[0039] c) The module has temperature reporting function. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0041] Figure 1 This is a schematic diagram of the structure of a multi-channel high-isolation low-power array receiving module according to an embodiment of the present application;

[0042] Figure 2 This is a schematic diagram of the layout of a multi-channel high-isolation, low-power array receiving module according to an embodiment of the present application;

[0043] Figure 3 This is a schematic diagram of the receiving frequency conversion circuit principle of an embodiment of the present application;

[0044] Figure 4 This is a schematic diagram of the principle of the local oscillator amplification and power splitter circuit according to an embodiment of the present application;

[0045] Figure 5 This is a schematic diagram of the power supply and control circuit of an embodiment of the present application. DETAILED DESCRIPTION

[0046] The present application is further described with reference to the accompanying drawings and embodiments. The embodiments described are only a part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field should fall within the scope of protection of the embodiments of the present application.

[0047] See also Figures 1 to 5 The present application provides an embodiment of a multi-channel high-isolation, low-power array receiving module, which includes a receiving frequency conversion circuit, a power supply and control circuit, and a local oscillator amplifying and power dividing circuit; the receiving frequency conversion circuit is connected to the power supply and control circuit and the local oscillator amplifying and power dividing circuit respectively; the power supply and control circuit is connected to the local oscillator amplifying and power dividing circuit;

[0048] The power supply and control circuit is used to convert the external power supply into the supply voltage required by the receiving module, and control the receiving frequency conversion circuit through external control instructions to achieve amplitude control, bandpass filter switching, and polarization selection;

[0049] The receiving frequency conversion circuit includes M receiving frequency conversion chains, each receiving frequency conversion chain receives a first local oscillator signal and a second local oscillator signal sent by a local oscillator amplifying and power dividing circuit, and is used to convert the radio frequency signal input thereto into an intermediate frequency signal for output; M is a positive integer;

[0050] The local oscillator amplifying power dividing circuit is used to respectively divide the local oscillator signal into M first local oscillator signals and M second local oscillator signals, and input them into M receiving frequency conversion links respectively.

[0051] Optionally, the structures and performances of the M receiving frequency conversion links are the same; each receiving frequency conversion link adopts a superheterodyne system, which has two radio frequency input ports, namely a vertical polarization port and a horizontal polarization port.

[0052] Optionally, each receiving frequency conversion link includes two branches, a circular polarizer, a polarization selection switch, a first bandpass filter group, a first amplifier, a second amplifier, a first low-pass filter, a first mixer, a second bandpass filter, a first digitally controlled attenuator, a third amplifier, a third bandpass filter, a temperature compensator, a second low-pass filter, a fourth amplifier, a third low-pass filter, a second mixer, a fourth bandpass filter, a second digitally controlled attenuator, a fifth amplifier, a fifth bandpass filter, and a fourth low-pass filter; the first bandpass filter group is composed of a plurality of first bandpass filters;

[0053] The two branches are a first branch and a second branch; the first branch and the second branch have the same structure, both including a first limiter and a first low-noise amplifier connected in sequence;

[0054] The two first limiters in the two branches are connected to the vertical polarization port and the horizontal polarization port respectively, and the two first low-noise amplifiers are both connected to the circular polarizer;

[0055] The circular polarizer is connected to the first mixer via the polarization selection switch, the first bandpass filter group, the first amplifier in sequence; the second amplifier is connected to the first mixer via the first low-pass filter;

[0056] The first mixer is connected to the second mixer in sequence through the second bandpass filter, the first digitally controlled attenuator, the third amplifier, the third bandpass filter, the temperature compensator, the second low-pass filter, the fourth amplifier, and the third low-pass filter;

[0057] The fourth amplifier is connected to the second mixer via a third low-pass filter;

[0058] The second mixer is connected to the fourth low-pass filter via the fourth band-pass filter, the second digitally controlled attenuator, the fifth amplifier, the fifth band-pass filter and the fourth low-pass filter in sequence.

[0059] Optionally, the vertical polarization port and the horizontal polarization port of each receiving frequency conversion link are respectively used to receive antenna signals;

[0060] The input end of the second amplifier is used to receive the first local oscillator signal sent by the frequency conversion circuit, and the output end is used to send the amplified first local oscillator signal to the first low-pass filter for filtering, and the filtered first local oscillator signal enters the first mixer;

[0061] The input end of the fourth amplifier is used to receive the second local oscillator signal sent by the frequency conversion circuit, and the output end is used to send the amplified second local oscillator signal to the third low-pass filter for filtering. The filtered second local oscillator signal enters the second mixer.

[0062] Optionally, the antenna signal received by each receiving frequency conversion link is sequentially amplitude-limited by a first limiter, then de-noised and amplified by a first low-noise amplifier, and then formed into a circularly polarized signal by a circular polarizer. After the circularly polarized signal is selected by a polarization selection switch, it enters a first bandpass filter group for broadband filtering, enters a first amplifier for power amplification, and then enters a first mixer for mixing with the amplified and filtered first local oscillator signal to obtain a first mixed signal, thereby completing up-conversion of the radio frequency signal and filtering of mixing spurious signals, local oscillator leakage, and second image frequencies. The circularly polarized signal includes a left-hand circularly polarized signal and a right-hand circularly polarized signal.

[0063] The first mixed signal is subjected to broadband filtering through a second band-pass filter to preselect the intermediate frequency signal and filter out the image frequency signal. The first mixed signal is then subjected to amplitude attenuation through a first digitally controlled attenuator, power amplified through a third amplifier, broadband filtered through a third band-pass filter, temperature compensated through a temperature compensator, filtered through a second low-pass filter, and then enters the second mixer.

[0064] The second mixer mixes the received signal to obtain a second mixed signal, completes the down-conversion and amplification of the intermediate frequency signal, and filters out mixing spurious and local oscillator leakage;

[0065] The second mixed signal is broadband filtered by the fourth bandpass filter, enters the fifth amplifier for power amplification, enters the fifth bandpass filter for broadband filtering, and enters the fourth low-pass filter for filtering to generate an intermediate frequency signal.

[0066] Optionally, the local oscillator amplifying and power dividing circuit is divided into a first local oscillator amplifying and power dividing circuit and a second local oscillator amplifying and power dividing circuit; the first local oscillator amplifying and power dividing circuit and the second local oscillator amplifying and power dividing circuit have the same structure and are used to generate a first local oscillator signal and a second local oscillator signal, respectively;

[0067] The first local oscillator amplifying power dividing circuit and the second local oscillator amplifying power dividing circuit each include a first attenuator, a second attenuator, a sixth amplifier, a fifth low-pass filter, and a power divider connected in sequence;

[0068] The external local oscillator signal is input into the first attenuator and the second attenuator in sequence for amplitude attenuation, and then amplified and filtered by the sixth amplifier and the fifth low-pass filter. The filtered local oscillator signal is amplified at the common end and then power-divided to ensure that the phase noise of the local oscillator signal is not affected.

[0069] Optionally, the receiving module is divided into three modules based on channel function and structural layout, namely, a RF front-end module, a first mixing module, and a second mixing module. The three modules are stacked and connected by blind plugging. There are N RF front-end modules in total, each corresponding to N input signals, and the internal cavity of the RF front-end module isolates the N signals. Each signal link in the first mixing module and the second mixing module is isolated by a spacer; M = N*N; where N is a positive integer.

[0070] Optionally, the radio frequency front-end module includes a first limiter, a first low-noise amplifier, a circular polarizer, a polarization selection switch, a first bandpass filter group, and a first amplifier in each receiving frequency conversion link;

[0071] The first frequency mixing module includes a second amplifier, a first low-pass filter, a first frequency mixer, a second band-pass filter, a first digitally controlled attenuator, a third amplifier, a third band-pass filter, a temperature compensator, and a first local oscillator amplification and power division circuit in each receiving frequency conversion link;

[0072] The second frequency mixing module includes a second low-pass filter, a fourth amplifier, a third low-pass filter, a second frequency mixer, a fourth band-pass filter, a second digitally controlled attenuator, a fifth amplifier, a fifth band-pass filter, a fourth low-pass filter, a second local oscillator amplification and power division circuit, a power supply and a control circuit in each receiving frequency conversion link.

[0073] Optionally, the power supply and control circuit includes a power conversion, a voltage and current detection circuit, a crystal oscillator, a temperature sensor, and a processor; the FPGA is connected to the power conversion, the voltage and current detection circuit, the filter circuit, the temperature sensor, and the crystal oscillator respectively;

[0074] The temperature sensor is used to measure the temperature in each receiving frequency conversion link. If the temperature is lower than the preset value, the temperature compensator is controlled to perform temperature compensation on the received signal.

[0075] The +12V power input is filtered by the filter circuit and then enters the power conversion, voltage, and current detection circuits. The voltage output by the power conversion, voltage, and current detection circuits is collected by the processor and calculated to obtain the operating current. The +12V power supply is converted by DC / DC to output +5.5V voltage. The +5.5V is converted by the low-dropout linear regulator (LDO) to output +5V to power the receiving frequency conversion link.

[0076] A crystal oscillator is used to provide a frequency reference for the processor.

[0077] Optionally, the power supply and control circuit use an SPI interface for communication, and the processor receives system commands and controls the polarization selection switch in each receiving frequency conversion link and the amplitude attenuation of the signal according to the control protocol;

[0078] The device's operating current and input voltage are collected through power conversion, voltage, and current detection circuits and reported to the processor.

[0079] like Figure 2 As shown, the receiving module is divided into three modules based on channel function and structural layout, and the three modules are stacked and connected by blind plugging. Module 1 (RF front-end module) includes a limiting amplifier circuit, a circular polarizer, a filter, and a switching amplifier. Module 2 (a mixer module, also called the first mixer module) includes a frequency conversion filter amplifier circuit, a local oscillator power splitter circuit (a first local oscillator amplifier power splitter circuit), etc. Module 3 (a second mixer module, also called the second mixer module) includes a frequency conversion filter amplifier circuit, a second local oscillator power splitter circuit (a second local oscillator amplifier power splitter circuit), a power supply, and a control circuit. There are eight RF front-end modules in total, each corresponding to eight input signals, and the internal cavity of the module isolates the eight signals. In the first and second mixer modules, each signal link is isolated by a spacer.

[0080] like Figure 3 As shown, the receive frequency conversion circuit includes 64 identical receive frequency conversion chains, which convert the RF input frequency of each channel within the module to an intermediate frequency output frequency, with identical performance across all channels. The receive frequency conversion chain utilizes a superheterodyne system. Two RF ports (vertically polarized and horizontally polarized receiving ports) receive antenna signals, preselect and amplify them, and then transform them into circularly polarized (left-hand or right-hand) signals through a polarizer. After broadband filtering and attenuation amplification, they are output to a mixing module (the first mixer). A first-stage limiting low-noise amplifier amplifies the signal, limits large signals, and ensures system noise figure. The broadband filter BPF1 is a bandpass filter that primarily preselects the RF signal and filters image signals. A bridge and polarization selector switch synthesize and switch between left-hand or right-hand circularly polarized signals. A frequency conversion channel (including a mixer, filter, intermediate frequency amplifier, and local oscillator amplifier) ​​performs RF signal upconversion, amplifies the intermediate frequency signal, and filters mixing spurious signals, local oscillator leakage, and two image frequencies. The second frequency conversion channel (including two mixing, filtering, two intermediate frequency amplification, and two local oscillator amplification) completes the down-conversion of the first intermediate frequency signal, the amplification of the second intermediate frequency signal, and the filtering of mixing spurious and local oscillator leakage.

[0081] like Figure 4 As shown in the figure, the externally input local oscillator signal is amplified and divided in the local oscillator power splitter circuit before being sent to the frequency conversion channel. The local oscillator is amplified and then divided at the common terminal to ensure that the local oscillator signal's phase noise is not degraded. To achieve an integrated design, the power splitter is embedded within the PCB. After the 1-to-64 power split, the local oscillator signal has an amplitude of approximately 0dBm and is sent to the frequency conversion SIP in the downconversion channel. The SIP has a built-in local oscillator amplifier that amplifies the signal to the power required by the mixer.

[0082] like Figure 5As shown, the control and power supply circuit has the following main functions:

[0083] a) The +12V power input is filtered and then enters the current detection circuit. The output voltage of the current detection circuit is sent to the ARM for acquisition and calculation to obtain the working current. The +12V power supply is converted by DC / DC to output +5.5V voltage. The +5.5V is converted by LDO to output +5V, which is used to power the receiving frequency conversion unit and the receiving frequency conversion circuit;

[0084] b) The system uses SPI interface communication. The main control circuit receives system commands and controls the polarization selection switch and attenuation control according to the control protocol.

[0085] c) The main control circuit collects the equipment working current, input voltage, working voltage, working current, and internal temperature data through the current detection circuit for real-time detection and reporting.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and not to limit them. Although the present application has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present application can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present application should be included in the scope of protection of the claims of the present application.

Claims

1. A multi-channel high isolation low power consumption array receiving module, characterized in that: It includes a receiving frequency conversion circuit, a power supply and control circuit, and a local oscillator amplifying and power dividing circuit; the receiving frequency conversion circuit is connected to the power supply and control circuit and the local oscillator amplifying and power dividing circuit respectively; the power supply and control circuit is connected to the local oscillator amplifying and power dividing circuit; The power supply and control circuit is used to convert the external power supply into the power supply voltage required by the receiving module, and control the receiving frequency conversion circuit through external control instructions to achieve amplitude control, bandpass filter group switching, and polarization selection; The receiving frequency conversion circuit includes M receiving frequency conversion chains, each receiving frequency conversion chain receives a first local oscillator signal and a second local oscillator signal sent by a local oscillator amplifying and power dividing circuit, and is used to convert the radio frequency signal input thereto into an intermediate frequency signal for output; The local oscillator amplifying power dividing circuit is used to respectively divide the local oscillator signal into M first local oscillator signals and M second local oscillator signals, and input them into M receiving frequency conversion links respectively.

2. The multi-channel high isolation low power consumption array receiving module according to claim 1, characterized in that: The structures and performances of the M receiving frequency conversion links are all the same; each receiving frequency conversion link adopts a superheterodyne system and has two radio frequency input ports, namely a vertical polarization port and a horizontal polarization port.

3. The multi-channel high isolation low power consumption array receiving module according to claim 2, characterized in that: Each receiving frequency conversion chain includes two branches, a circular polarizer, a polarization selection switch, a first band-pass filter group, a first amplifier, a second amplifier, a first low-pass filter, a first mixer, a second band-pass filter, a first digitally controlled attenuator, a third amplifier, a third band-pass filter, a temperature compensator, a second low-pass filter, a fourth amplifier, a third low-pass filter, a second mixer, a fourth band-pass filter, a second digitally controlled attenuator, a fifth amplifier, a fifth band-pass filter, and a fourth low-pass filter; The two branches are a first branch and a second branch; the first branch and the second branch have the same structure, both including a first limiter and a first low-noise amplifier connected in sequence; The two first limiters in the two branches are connected to the vertical polarization port and the horizontal polarization port respectively, and the two first low-noise amplifiers are both connected to the circular polarizer; The circular polarizer is connected to the first mixer via the polarization selection switch, the first bandpass filter group, the first amplifier in sequence; the second amplifier is connected to the first mixer via the first low-pass filter; The first mixer is connected to the second mixer in sequence through the second bandpass filter, the first digitally controlled attenuator, the third amplifier, the third bandpass filter, the temperature compensator, the second low-pass filter, the fourth amplifier, and the third low-pass filter; The fourth amplifier is connected to the second mixer via a third low-pass filter; The second mixer is connected to the fourth low-pass filter via the fourth band-pass filter, the second digitally controlled attenuator, the fifth amplifier, the fifth band-pass filter and the fourth low-pass filter in sequence.

4. The multi-channel high-isolation low-power array receiving module according to claim 3, characterized in that: The vertical polarization port and the horizontal polarization port of each receiving frequency conversion link are respectively used to receive antenna signals; The input end of the second amplifier is used to receive the first local oscillator signal sent by the frequency conversion circuit, and the output end is used to send the amplified first local oscillator signal to the first low-pass filter for filtering, and the filtered first local oscillator signal enters the first mixer; The input end of the fourth amplifier is used to receive the second local oscillator signal sent by the frequency conversion circuit, and the output end is used to send the amplified second local oscillator signal to the third low-pass filter for filtering. The filtered second local oscillator signal enters the second mixer.

5. The multi-channel high-isolation low-power array receiving module according to claim 3, characterized in that: The antenna signal received by each receiving frequency conversion link is sequentially amplitude-limited by the first limiter, then de-noised and amplified by the first low-noise amplifier, and then formed into a circularly polarized signal by the circular polarizer. After the circularly polarized signal is selected by the polarization selection switch, it enters the first bandpass filter group for broadband filtering, enters the first amplifier for power amplification, and then enters the first mixer for mixing with the amplified and filtered first local oscillator signal to obtain a first mixed signal, completing the up-conversion of the RF signal and filtering of mixing spurious, local oscillator leakage, and second image frequency. The circularly polarized signal includes a left-hand circularly polarized signal and a right-hand circularly polarized signal. The first mixed signal is subjected to broadband filtering through a second band-pass filter to preselect the intermediate frequency signal and filter out the image frequency signal. The first mixed signal is then subjected to amplitude attenuation through a first digitally controlled attenuator, power amplified through a third amplifier, broadband filtered through a third band-pass filter, temperature compensated through a temperature compensator, filtered through a second low-pass filter, and then enters the second mixer. The second mixer mixes the received signal to obtain a second mixed signal, completes the down-conversion and amplification of the intermediate frequency signal, and filters out mixing spurious and local oscillator leakage; The second mixed signal is broadband filtered by the fourth bandpass filter, enters the fifth amplifier for power amplification, enters the fifth bandpass filter for broadband filtering, and enters the fourth low-pass filter for filtering to generate an intermediate frequency signal.

6. The multi-channel high-isolation low-power array receiving module according to claim 1, characterized in that: The local oscillator amplifying and power dividing circuit is divided into a first local oscillator amplifying and power dividing circuit and a second local oscillator amplifying and power dividing circuit; the first local oscillator amplifying and power dividing circuit and the second local oscillator amplifying and power dividing circuit have the same structure and are used to generate a first local oscillator signal and a second local oscillator signal, respectively; The first local oscillator amplifying power dividing circuit and the second local oscillator amplifying power dividing circuit each include a first attenuator, a second attenuator, a sixth amplifier, a fifth low-pass filter, and a power divider connected in sequence; The external local oscillator signal is input into the first attenuator and the second attenuator in sequence for amplitude attenuation, and then amplified and filtered by the sixth amplifier and the fifth low-pass filter. The filtered local oscillator signal is amplified at the common end and then power-divided to ensure that the phase noise of the local oscillator signal is not affected.

7. The multi-channel high-isolation low-power array receiving module according to claim 6, characterized in that: The receiving module is divided into three modules based on channel function and structural layout: the RF front-end module, the first mixing module, and the second mixing module. The three modules are stacked and connected by blind plugging. There are N RF front-end modules in total, each corresponding to N input signals. The RF front-end modules have internal cavities to isolate the N signals. Each signal chain in the first mixing module and the second mixing module is isolated by a spacer; M=N*N.

8. The multi-channel high-isolation low-power array receiving module according to claim 7, characterized in that: The RF front-end module includes a first limiter, a first low-noise amplifier, a circular polarizer, a polarization selection switch, a first bandpass filter group, and a first amplifier in each receiving frequency conversion link; The first frequency mixing module includes a second amplifier, a first low-pass filter, a first frequency mixer, a second band-pass filter, a first digitally controlled attenuator, a third amplifier, a third band-pass filter, a temperature compensator, and a first local oscillator amplification and power division circuit in each receiving frequency conversion link; The second frequency mixing module includes a second low-pass filter, a fourth amplifier, a third low-pass filter, a second frequency mixer, a fourth band-pass filter, a second digitally controlled attenuator, a fifth amplifier, a fifth band-pass filter, a fourth low-pass filter, a second local oscillator amplification and power division circuit, a power supply and a control circuit in each receiving frequency conversion link.

9. The multi-channel high-isolation low-power array receiving module according to claim 1, characterized in that: The power supply and control circuit includes power conversion, voltage and current detection circuit, crystal oscillator, temperature sensor, and processor; FPGA is connected to the power conversion, voltage and current detection circuit, filter circuit, temperature sensor, and crystal oscillator respectively; The temperature sensor is used to measure the temperature in each receiving frequency conversion link. If the temperature is lower than the preset value, the temperature compensator is controlled to perform temperature compensation on the received signal. The +12V power input is filtered by the filter circuit and then enters the power conversion, voltage, and current detection circuits. The voltage output by the power conversion, voltage, and current detection circuits is collected by the processor and calculated to obtain the operating current. The +12V power supply is converted by DC / DC to output +5.5V voltage. The +5.5V is converted by the low-dropout linear regulator (LDO) to output +5V to power the receiving frequency conversion link. A crystal oscillator is used to provide a frequency reference for the processor.

10. The multi-channel high-isolation low-power array receiving module according to claim 1, characterized in that: The power supply and control circuit use SPI interface communication. The processor receives system commands and controls the polarization selection switch in each receiving frequency conversion link and the amplitude attenuation of the signal according to the control protocol. The device's operating current and input voltage are collected through power conversion, voltage, and current detection circuits and reported to the processor.

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