A multi-band microwave angular error signal generation device

Abstract

This invention discloses a multi-band microwave angular error signal generation device, belonging to the field of communication and data transmission. The invention includes a sum-difference comparator, S-band left-hand circular link, X-band left-hand circular link, Ka-band left-hand circular link, S-band right-hand circular link, X-band right-hand circular link, Ka-band right-hand circular link, intermediate frequency switching matrix, X-band angular tracking error baseband signal demodulation processing module, Ka-band angular tracking error baseband signal demodulation processing module, S-band angular tracking error baseband signal demodulation processing module, and angular error signal switching unit. This invention simultaneously supports angular error extraction from left-hand and right-hand circular signals in S-band, X-band, and Ka-band, and can operate in multiple working states, improving the adaptability of the device.

Description

Technical Field

[0001] This invention relates to the field of communication and data transmission, and in particular to a multi-band microwave angular error signal generation device, which can be used for angular error extraction in satellite communication and data ground receiving stations. Background Technology

[0002] Traditional microwave acquisition and tracking link establishment devices only have a few that simultaneously support angular error extraction in the S-band, X-band, and Ka-band. Furthermore, these devices only support one transmission mode for the differential and combined signals for each frequency band. In dual-channel transmission mode, the processing and transmission paths of the differential and combined signals are different, preventing interference between the two signals. This results in higher accuracy of the angular error signal extracted from these signals, leading to higher acquisition and tracking link establishment accuracy. However, the different processing and transmission paths of the two signals cause varying processing errors at different frequencies and times. This necessitates phase calibration before each mission, reducing the acquisition and tracking link establishment speed.

[0003] In single-channel transmission mode, the processing of the differential signal and the combined signal follows the same transmission path. This causes the two signals to influence each other, reducing the accuracy of the subsequently extracted angular error signal and consequently lowering the acquisition, tracking, and link establishment accuracy. However, because the processing of both signals follows the same transmission path, they have the same processing error at different frequencies and times. This eliminates the need for phase correction before each task, improving the acquisition, tracking, and link establishment speed. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the above-mentioned background technology and provide a multi-band microwave angle error signal generation device, which has the characteristics of high reliability, high stability and low implementation complexity.

[0005] The objective of this invention is achieved as follows:

[0006] A multi-band microwave angular error signal generation device includes a sum-difference comparator 1, an S-band left-hand circular link, an X-band left-hand circular link, a Ka-band left-hand circular link, an S-band right-hand circular link, an X-band right-hand circular link, a Ka-band right-hand circular link, an intermediate frequency switching matrix 6, an X-band angular tracking error baseband signal demodulation processing module 7-1, a Ka-band angular tracking error baseband signal demodulation processing module 7-2, an S-band angular tracking error baseband signal demodulation processing module 7-3, and an angular error signal switching unit 8;

[0007] The sum-difference comparator 1 receives the received signals of each frequency band from the antenna and generates left-hand and right-hand rotary signals for S-band, X-band, and Ka-band, which are then transmitted to the corresponding links.

[0008] After processing the signal, each link transmits it to the intermediate frequency switching matrix 6;

[0009] The intermediate frequency switching matrix 6 transmits the received frequency band signals to the corresponding angle tracking error baseband signal demodulation processing modules 7-1, 7-2, and 7-3 through internal switching.

[0010] The baseband signal demodulation processing modules 7-1, 7-2, and 7-3 for each tracking error generate corresponding frequency band angle error signals and transmit them to the angle error switching unit 8.

[0011] The angle error switching unit 8 switches and outputs angle error signals of different frequency bands according to the angle tracking strategy.

[0012] Furthermore, both the S-band left-hand rotary link and the S-band right-hand rotary link include a differential signal link and a combining signal link; in the S-band left-hand rotary link and the S-band right-hand rotary link, the differential signal and the combining signal pass sequentially through low-noise amplifiers 4-7, 4-8, 4-15, 4-16 and downconverters 5-7, 5-8, 5-15, 5-16 in their respective signal links before entering the intermediate frequency switching matrix 6;

[0013] The X-band left-hand circular link, Ka-band left-hand circular link, X-band right-hand circular link, and Ka-band right-hand circular link all include a differential signal input link, a combining signal input link, a differential signal processing link, a combining signal processing link, and an orthogonal combining signal processing link;

[0014] In the X-band left-hand circular link, Ka-band left-hand circular link, X-band right-hand circular link, and Ka-band right-hand circular link, the differential signal and the combined signal enter the two-way selector switches 2-1, 2-2, 2-3, 2-4, 2-5, 2-6, 2-7, and 2-8 of their respective input links. When the device operates in dual-channel transmission mode in the corresponding frequency band, the two two-way selector switches switch the input differential signal and combined signal to output, and the output signals enter the differential signal processing link and the combined signal processing link, respectively. When the device operates in single-channel transmission mode in the corresponding frequency band, the two two-way selector switches switch the input differential signal and combined signal to output to the quadrature combiners 3-1 and 3-2, respectively. The quadrature combiners 3-1, 3-2, 3-3, and 3-4 perform quadrature mixing processing on the differential signal and the combined signal, and then output the output signal into the quadrature combined signal processing link. In the differential signal processing link, the combined signal processing link, and the quadrature combined signal processing link, the output signal sequentially passes through the low-noise amplifiers 4-1, 4-2, 4-3, 4-4, 4-5, 4-6, 4-9, 4-10, 4-11, 4-12, 4-13, and 4-14 of their respective processing links and the downconverters 5-1, 5-2, 5-3, 5-4, 5-5, 5-6, 5-9, 5-10, 5-11, 5-12, 5-13, and 5-14 before entering the intermediate frequency switching matrix 6.

[0015] Furthermore, when the device operates in single-channel transmission mode in the X-band or Ka-band, if it is in left-handed angular tracking mode, the intermediate frequency switching matrix 6 will internally switch the signal of the combined signal processing link of the left-handed link in the corresponding frequency band to the angular tracking error baseband signal demodulation processing modules 7-1 and 7-2 in the corresponding frequency band; if it is in right-handed angular tracking mode, the intermediate frequency switching matrix 6 will internally switch the signal of the combined signal processing link of the right-handed link in the corresponding frequency band to the angular tracking error baseband signal demodulation processing modules 7-1 and 7-2 in the corresponding frequency band.

[0016] When the device operates in dual-channel transmission mode in the X-band or Ka-band, if it is in left-handed angular tracking mode, the intermediate frequency switching matrix 6 will internally switch the signals of the differential signal processing link and the combined signal processing link of the left-handed link in the corresponding frequency band to the angular tracking error baseband signal demodulation processing modules 7-1 and 7-2. If it is in right-handed angular tracking mode, the intermediate frequency switching matrix 6 will internally switch the signals of the differential signal processing link and the combined signal processing link of the right-handed link in the corresponding frequency band to the angular tracking error baseband signal demodulation processing modules 7-1 and 7-2.

[0017] When the device is in the S-band left-hand circular signal angle tracking operation state, the intermediate frequency switching matrix 6 transmits the signals of the differential signal link and the combined signal link of the S-band left-hand circular link to the S-band angle tracking error baseband signal demodulation processing module 7-3 through internal switching; when the device is in the S-band right-hand circular signal angle tracking operation state, the intermediate frequency switching matrix 6 transmits the signals of the differential signal link and the combined signal link of the S-band right-hand circular link to the S-band angle tracking error baseband signal demodulation processing module 7-3 through internal switching.

[0018] Furthermore, the X-band angle tracking error baseband signal demodulation processing module 7-1, the Ka-band angle tracking error baseband signal demodulation processing module 7-2, and the S-band angle tracking error baseband signal demodulation processing module 7-3 respectively perform angle error extraction processing on the input signal to generate S-band angle error signal, X-band angle error signal, and Ka-band angle error signal, and transmit them to the angle error switching unit 8.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] 1. This invention supports left-handed or right-handed signal angle tracking operation, supports S-band, X-band or Ka-band angle tracking operation, and supports dual-channel and single-channel signal transmission modes for X-band and Ka-band, thus improving the adaptability of the device.

[0021] 2. When transmitting differential and combined signals in the X-band and Ka-band, this invention supports both dual-channel and single-channel transmission modes. Under high elevation angle reception conditions, the single-channel transmission mode is first used to improve the acquisition, tracking, and link establishment speed. Under low elevation angle reception conditions, the dual-channel transmission mode is used to improve the signal acquisition, tracking, and link establishment accuracy, ensuring the normal operation of the system and thus comprehensively improving the system's performance indicators. Attached Figure Description

[0022] Figure 1 This is a block diagram illustrating the principle of the present invention. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings.

[0024] A multi-band microwave angle error signal generation device, referenced Figure 1 It includes a sum-difference comparator 1, a two-to-one switching switch 2-1~2-8, an orthogonal combiner 3-1~3-4, a low-noise amplifier 4-1~4-16, a downconverter 5-1~5-16, an intermediate frequency switching matrix 6, an angle tracking error baseband signal demodulation processing module 7-1~7-3, and an angle error signal switching unit 8.

[0025] Among them, the sum-difference comparator 1 receives the received signals of each frequency band transmitted down from the antenna, and generates and outputs the S-band left-hand differential signal, S-band left-hand combined signal, X-band left-hand differential signal, X-band left-hand combined signal, Ka-band left-hand differential signal, Ka-band left-hand combined signal, S-band right-hand differential signal, S-band right-hand combined signal, X-band right-hand differential signal, X-band right-hand combined signal, Ka-band right-hand differential signal, and Ka-band right-hand combined signal.

[0026] Two-to-one selector switch 2-1 and two-to-one selector switch 2-2 receive the X-band left-hand differential signal and the X-band left-hand combined signal, respectively.

[0027] When the device operates in X-band dual-channel transmission mode, the two-to-one selection switch 2-1 and the two-to-one selection switch 2-2 switch the input X-band differential signal and the X-band left-hand rotary combined signal to the low-noise amplifier 4-5 and the low-noise amplifier 4-4 respectively. The low-noise amplifier 4-5 and the low-noise amplifier 4-4 perform low-noise amplification processing on the received X-band left-hand differential signal and the X-band left-hand rotary combined signal respectively, and transmit the processed signals to the downconverter 5-5 and the downconverter 5-4 respectively. The downconverter 5-5 and the downconverter 5-4 perform downconversion processing on the input signals respectively, and transmit the processed signals to the intermediate frequency switching matrix 6 respectively.

[0028] When the device operates in X-band single-channel transmission mode, the two-to-one selection switch 2-1 and the two-to-one selection switch 2-2 switch the input X-band left-hand differential signal and the X-band left-hand combined signal to the quadrature combiner 3-1 respectively. The quadrature combiner 3-1 performs quadrature mixing processing on the received X-band left-hand differential signal and the X-band left-hand combined signal and then transmits them to the low-noise amplifier 4-6. The low-noise amplifier 4-6 performs low-noise amplification processing on the received signal and transmits the processed signal to the downconverter 5-6. The downconverter 5-6 performs downconversion processing on the input signal and transmits the processed signal to the intermediate frequency switching matrix 6.

[0029] Two-to-one selector switches 2-3 and 2-4 receive the Ka-band left-hand differential signal and the Ka-band left-hand combined signal, respectively.

[0030] When the device operates in Ka-band dual-channel transmission mode, the two-to-one selection switch 2-3 and the two-to-one selection switch 2-4 switch the input Ka-band left-hand differential signal and the Ka-band left-hand combined signal to the low-noise amplifier 4-2 and the low-noise amplifier 4-1, respectively. The low-noise amplifier 4-2 and the low-noise amplifier 4-1 perform low-noise amplification processing on the received Ka-band left-hand differential signal and the Ka-band left-hand combined signal, respectively, and transmit the processed signals to the downconverter 5-2 and the downconverter 5-1, respectively. The downconverter 5-2 and the downconverter 5-1 perform downconversion processing on the input signals, and transmit the processed signals to the intermediate frequency switching matrix 6, respectively.

[0031] When the device operates in Ka-band single-channel transmission mode, the two-to-one selection switch 2-3 and the two-to-one selection switch 2-4 switch the input Ka-band left-hand differential signal and the Ka-band left-hand combined signal to the quadrature combiner 3-2 respectively. The quadrature combiner 3-2 performs quadrature mixing processing on the received Ka-band left-hand differential signal and the Ka-band left-hand combined signal and then transmits them to the low-noise amplifier 4-3. The low-noise amplifier 4-3 performs low-noise amplification processing on the received quadrature differential signal and transmits the processed signal to the downconverter 5-3. The downconverter 5-3 performs downconversion processing on the input signal and transmits the processed signal to the intermediate frequency switching matrix 6.

[0032] Low-noise amplifiers 4-7 and 4-8 receive the S-band left-hand rotary combined signal and the S-band left-hand rotary differential signal, respectively. They perform low-noise amplification on the received signals and transmit the processed signals to down-converters 5-7 and 5-8, respectively.

[0033] Downconverters 5-7 and 5-8 perform downconversion processing on the input signals respectively, and transmit the processed signals to the intermediate frequency switching matrix 6 respectively.

[0034] Two-to-one selector switches 2-7 and 2-8 receive the X-band right-hand differential signal and the X-band right-hand combined signal, respectively.

[0035] When the device operates in X-band dual-channel transmission mode, the two-to-one selection switch 2-7 and the two-to-one selection switch 2-8 switch the input X-band right-hand differential signal and the X-band right-hand combined signal to the low-noise amplifier 4-12 and the low-noise amplifier 4-13 respectively. The low-noise amplifier 4-12 and the low-noise amplifier 4-13 perform low-noise amplification processing on the received X-band right-hand differential signal and the X-band right-hand combined signal respectively, and transmit the processed signals to the downconverter 5-12 and the downconverter 5-13 respectively. The downconverter 5-12 and the downconverter 5-13 perform downconversion processing on the input signals respectively, and transmit the processed signals to the intermediate frequency switching matrix 6 respectively.

[0036] When the device operates in X-band single-channel transmission mode, the two-to-one selection switch 2-7 and the two-to-one selection switch 2-8 switch the input X-band right-hand differential signal and the X-band right-hand combined signal to the quadrature combiner 3-4 respectively. The quadrature combiner 3-4 performs quadrature mixing processing on the received X-band right-hand differential signal and the X-band right-hand combined signal and then transmits them to the low-noise amplifier 4-14. The low-noise amplifier 4-14 performs low-noise amplification processing on the received signal and transmits the processed signal to the downconverter 5-14. The downconverter 5-14 performs downconversion processing on the input signal and transmits the processed signal to the intermediate frequency switching matrix 6.

[0037] Two-to-one selector switches 2-5 and 2-6 respectively receive the Ka-band right-hand differential signal and the Ka-band right-hand combined signal.

[0038] When the device operates in Ka-band dual-channel transmission mode, the two-to-one selection switches 2-5 and 2-6 switch the input Ka-band right-hand differential signal and Ka-band right-hand combined signal to low-noise amplifiers 4-9 and 4-10 respectively. Low-noise amplifiers 4-9 and 4-10 perform low-noise amplification processing on the received Ka-band right-hand differential signal and Ka-band right-hand combined signal respectively, and transmit the processed signals to downconverters 5-9 and 5-10 respectively. Downconverters 5-9 and 5-10 perform downconversion processing on the input signals respectively, and transmit the processed signals to the intermediate frequency switching matrix 6 respectively.

[0039] When the device operates in Ka single-channel transmission mode, the two-to-one selection switch 2-5 and the two-to-one selection switch 2-6 switch the input Ka-band right-hand differential signal and the Ka-band right-hand combined signal to the quadrature combiner 3-3 respectively. The quadrature combiner 3-3 performs quadrature mixing processing on the received Ka-band right-hand differential signal and the Ka-band right-hand combined signal and then transmits them to the low-noise amplifier 4-11. The low-noise amplifier 4-11 performs low-noise amplification processing on the received signal and transmits the processed signal to the downconverter 5-11. The downconverter 5-11 performs downconversion processing on the input signal and transmits the processed signal to the intermediate frequency switching matrix 6.

[0040] Low-noise amplifiers 4-15 and 4-16 receive the S-band right-hand differential signal and the S-band right-hand combined signal, respectively. They perform low-noise amplification on the received signals and transmit the processed signals to down-converters 5-15 and 5-16, respectively.

[0041] Downconverters 5-15 and 5-16 perform downconversion processing on the input signals respectively, and transmit the processed signals to the intermediate frequency switching matrix 6 respectively.

[0042] When the device is operating in X-band single-channel transmission mode, if it is in X-band left-handed signal angle tracking mode, the intermediate frequency switching matrix 6 will transmit the signal output by the downconverter 5-6 to the angle tracking error baseband signal demodulation processing module 7-1 through internal switching; if it is in X-band right-handed signal angle tracking mode, the intermediate frequency switching matrix 6 will transmit the signal output by the downconverter 5-14 to the angle tracking error baseband signal demodulation processing module 7-1 through internal switching.

[0043] When the device is operating in the X-band dual-channel transmission state, if it is in the X-band left-handed signal angle tracking state, the intermediate frequency switching matrix 6 will internally switch the signals output by downconverters 5-4 and 5-5 to the angle tracking error baseband signal demodulation processing module 7-1; if it is in the X-band right-handed signal angle tracking state, the intermediate frequency switching matrix 6 will internally switch the signals output by downconverters 5-12 and 5-13 to the angle tracking error baseband signal demodulation processing module 7-1.

[0044] When the device is operating in Ka-band single-channel transmission mode, if it is in Ka-band left-handed signal angle tracking mode, the intermediate frequency switching matrix 6 will internally switch the signal output from the downconverter 5-3 to the angle tracking error baseband signal demodulation processing module 7-2; if it is in Ka-band right-handed signal angle tracking mode, the intermediate frequency switching matrix 6 will internally switch the signal output from the downconverter 5-11 to the angle tracking error baseband signal demodulation processing module 7-2.

[0045] When the device is operating in Ka-band dual-channel transmission mode, if it is in Ka-band left-handed signal angle tracking mode, the intermediate frequency switching matrix 6 will internally switch the signals output by downconverters 5-1 and 5-2 to the angle tracking error baseband signal demodulation processing module 7-2; if it is in Ka-band right-handed signal angle tracking mode, the intermediate frequency switching matrix 6 will internally switch the signals output by downconverters 5-9 and 5-10 to the angle tracking error baseband signal demodulation processing module 7-2.

[0046] When the device is in S-band left-hand rotary signal angle tracking mode, the intermediate frequency switching matrix 6 internally switches and transmits the signals output from downconverters 5-7 and 5-8 to the angle tracking error baseband signal demodulation processing module 7-3. When the device is in S-band right-hand rotary signal angle tracking mode, the intermediate frequency switching matrix 6 internally switches and transmits the signals output from downconverters 5-15 and 5-16 to the angle tracking error baseband signal demodulation processing module 7-3.

[0047] The angle tracking error baseband signal demodulation processing modules 7-1 to 7-3 perform angle error extraction processing on the input signal, and generate S-band angle error signal, X-band angle error signal and Ka-band angle error signal respectively, which are then transmitted to the angle error switching unit 8.

[0048] The angle error switching unit 8 switches between different angle error signals and outputs them according to the angle tracking strategy.

[0049] The above processing completes the generation of the microwave link angle error signal.

[0050] This invention simultaneously supports the extraction of angular errors of left-hand and right-hand rotary signals in S-band, X-band, and Ka-band, and can operate in multiple working states, thus improving the adaptability of the device.

[0051] This invention supports both dual-channel and single-channel transmission modes when transmitting differential and combined signals in the X-band and Ka-band. Under high elevation angle reception conditions, the single-channel transmission mode is first used to improve the acquisition, tracking, and link establishment speed. Under low elevation angle reception conditions, the dual-channel transmission mode is used to improve the signal acquisition, tracking, and link establishment accuracy, ensuring the normal operation of the system and thus comprehensively improving the system's performance indicators.

Claims

1. A multi-band microwave angle error signal generation device, characterized in that, It includes a sum-difference comparator (1), an S-band left-hand rotary link, an X-band left-hand rotary link, a Ka-band left-hand rotary link, an S-band right-hand rotary link, an X-band right-hand rotary link, a Ka-band right-hand rotary link, an intermediate frequency switching matrix (6), an X-band angle tracking error baseband signal demodulation processing module (7-1), a Ka-band angle tracking error baseband signal demodulation processing module (7-2), an S-band angle tracking error baseband signal demodulation processing module (7-3), and an angle error signal switching unit (8). The sum-difference comparator (1) receives the received signals of each frequency band from the antenna and generates left-hand and right-hand rotating signals for the S-band, X-band, and Ka-band, which are then transmitted to the corresponding links. After each link processes the signal, it is transmitted to the intermediate frequency switching matrix (6). The intermediate frequency switching matrix (6) transmits the received frequency band signals to the corresponding angle tracking error baseband signal demodulation processing modules (7-1, 7-2, 7-3) through internal switching. Each corner tracking error baseband signal demodulation processing module (7-1, 7-2, 7-3) generates corner error signals of the corresponding frequency band and transmits them to the corner error switching unit (8). The angle error switching unit (8) switches and outputs angle error signals of different frequency bands according to the angle tracking strategy; Both the S-band left-hand rotary link and the S-band right-hand rotary link include a differential signal link and a combined signal link; in the S-band left-hand rotary link and the S-band right-hand rotary link, the differential signal and the combined signal pass sequentially through the low-noise amplifier (4-7, 4-8, 4-15, 4-16) and the downconverter (5-7, 5-8, 5-15, 5-16) in their respective signal links before entering the intermediate frequency switching matrix (6). The X-band left-hand circular link, Ka-band left-hand circular link, X-band right-hand circular link, and Ka-band right-hand circular link all include a differential signal input link, a combining signal input link, a differential signal processing link, a combining signal processing link, and an orthogonal combining signal processing link; In the X-band left-hand circular link, Ka-band left-hand circular link, X-band right-hand circular link, and Ka-band right-hand circular link, the differential signal and the combined signal enter the two-to-one switching switch (2-1, 2-2, 2-3, 2-4, 2-5, 2-6, 2-7, 2-8) of their respective input links. When the device is operating in the dual-channel transmission state of the corresponding frequency band, the two two-to-one selection switches switch the input differential signal and the combined signal to output, and the output signals enter the differential signal processing link and the combined signal processing link, respectively. When the device operates in single-channel transmission mode within the corresponding frequency band, two 2-to-1 selector switches switch the input differential signal and combined signal to the orthogonal combiner (3-1, 3-2, 3-3, 3-4) respectively. The orthogonal combiner (3-1, 3-2, 3-3, 3-4) performs orthogonal mixing processing on the differential signal and the combined signal before outputting the output signal, which then enters the orthogonal combined signal processing link. The differential signal processing link, the combined signal processing link, and the orthogonal combiner... In the signal processing link, the output signal passes sequentially through the low-noise amplifiers (4-1, 4-2, 4-3, 4-4, 4-5, 4-6, 4-9, 4-10, 4-11, 4-12, 4-13, 4-14) and downconverters (5-1, 5-2, 5-3, 5-4, 5-5, 5-6, 5-9, 5-10, 5-11, 5-12, 5-13, 5-14) of their respective processing links before entering the intermediate frequency switching matrix (6).

2. The multi-band microwave angle error signal generating device according to claim 1, characterized in that, When the device operates in single-channel transmission mode in X-band or Ka-band, if it is in left-handed angular tracking mode, the intermediate frequency switching matrix (6) will internally switch the signal of the combined signal processing link of the left-handed link in the corresponding frequency band to the angular tracking error baseband signal demodulation processing module (7-1, 7-2) in the corresponding frequency band; if it is in right-handed angular tracking mode, the intermediate frequency switching matrix (6) will internally switch the signal of the combined signal processing link of the right-handed link in the corresponding frequency band to the angular tracking error baseband signal demodulation processing module (7-1, 7-2) in the corresponding frequency band. When the device operates in the dual-channel transmission state of the X-band or Ka-band, if it is in the left-handed signal angle tracking state, the intermediate frequency switching matrix (6) will internally switch the signals of the differential signal processing link and the combined signal processing link of the left-handed link in the corresponding frequency band to the angle tracking error baseband signal demodulation processing module (7-1, 7-2); if it is in the right-handed signal angle tracking state, the intermediate frequency switching matrix (6) will internally switch the signals of the differential signal processing link and the combined signal processing link of the right-handed link in the corresponding frequency band to the angle tracking error baseband signal demodulation processing module (7-1, 7-2). When the device is in the S-band left-hand circular signal angle tracking operation state, the intermediate frequency switching matrix (6) transmits the signals of the differential signal link and the combined signal link of the S-band left-hand circular link to the S-band angle tracking error baseband signal demodulation processing module (7-3) through internal switching; when the device is in the S-band right-hand circular signal angle tracking operation state, the intermediate frequency switching matrix (6) transmits the signals of the differential signal link and the combined signal link of the S-band right-hand circular link to the S-band angle tracking error baseband signal demodulation processing module (7-3) through internal switching.

3. The multi-band microwave angle error signal generating device according to claim 2, characterized in that, The X-band angle tracking error baseband signal demodulation processing module (7-1), the Ka-band angle tracking error baseband signal demodulation processing module (7-2), and the S-band angle tracking error baseband signal demodulation processing module (7-3) respectively perform angle error extraction processing on the input signal, generate S-band angle error signal, X-band angle error signal and Ka-band angle error signal, and transmit them to the angle error switching unit (8).

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