Integrated V-frequency-band transceiving frequency conversion assembly with closed-loop self-checking function

Abstract

The invention discloses an integrated V-frequency-band transceiving frequency conversion assembly with a closed-loop self-checking function, and relates to transceiving frequency conversion equipment in the field of satellite communication. The system comprises a transmitting link, a receiving link and a self-checking receiving link. The transmitting link is composed of a transmitting intermediate frequency circuit, a transmitting local oscillator circuit, a transmitting frequency mixing circuit, a transmitting radio frequency circuit, a reference circuit and a power supply monitoring unit. The receiving link is composed of a receiving radio frequency circuit, a receiving frequency mixing circuit, a receiving local oscillator circuit, a receiving intermediate frequency circuit, a reference circuit and a power supply monitoring unit. The self-checking receiving link is provided with a self-checking receiving radio frequency circuit, and other circuits are consistent with the receiving link. Through the integrated design, high integration of the transmitting and receiving assembly is realized. The transceiving assembly has the characteristics of high frequency, small size, light weight and capability of radio frequency closed-loop self-inspection, and is particularly suitable for being used as an inter-satellite or satellite-ground transceiving frequency conversion assembly in a low-orbit satellite internet system.

Description

Technical Field

[0001] The present invention relates to an integrated V-band transceiver frequency conversion component with a closed-loop self-checking function in the field of satellite communications, and is particularly suitable for being used as an inter-satellite or satellite-to-ground transceiver frequency conversion component in a low-orbit satellite Internet system. Background Art

[0002] In recent years, with the rapid development of low-orbit satellite Internet, the platform has put forward more stringent requirements on the volume, weight, cost and health management functions of the payload. The original RF payloads mostly adopt the form of independent equipment, that is, the upconverter, downconverter, power amplifier and low-noise amplifier are all independent devices. This form is large in size and weight, with many interconnecting cables, and gradually cannot meet the payload requirements under the new situation; on the other hand, the satellite payload has poor testability during on-orbit operation, and the equipment itself needs to have fault location capabilities. The original equipment payload equipment is lacking in both health management parameter collection and fault location capabilities. Therefore, for the low-orbit satellite Internet platform payload, it is necessary to develop an integrated transceiver frequency conversion payload with closed-loop self-test function to support the development of low-orbit satellite Internet. Summary of the invention

[0003] The purpose of the present invention is to avoid the shortcomings of the above-mentioned background technology and provide an integrated V-band transceiver frequency conversion component with closed-loop self-checking function. The present invention has the characteristics of high frequency, small size, light weight and radio frequency closed-loop self-checking.

[0004] The object of the present invention is achieved in that:

[0005] An integrated V-band transceiver frequency conversion component with a closed-loop self-checking function includes a transmitting intermediate frequency circuit 101, a transmitting local oscillator circuit 102, a transmitting mixing circuit 103, a transmitting radio frequency circuit 104, a receiving radio frequency circuit 105, a self-checking receiving radio frequency circuit 106, a receiving mixing circuit 107, a receiving local oscillator circuit 108, a receiving intermediate frequency circuit 109, a reference circuit 110, and a power supply monitoring unit 111;

[0006] In the transmission link, the external input C-band intermediate frequency signal is fed from the input port and input to the transmission intermediate frequency circuit 101. After attenuation, filtering and amplification in the transmission intermediate frequency circuit 101, it is fed to the transmission mixing circuit 103, and up-conversion is performed in the transmission mixing circuit 103. The output radio frequency signal is fed to the transmission radio frequency circuit 104, and the V-band signal is output after amplification, microstrip waveguide transition and waveguide filtering. The transmission local oscillator circuit 102 provides the transmission mixing circuit 103 with an up-conversion local oscillator.

[0007] In the receiving link, the external V-band RF signal is fed from the input port and input to the receiving RF circuit 105. After being amplified, attenuated and switched in the receiving RF circuit 105, it is fed to the receiving mixer circuit 107. Down-conversion is performed in the receiving mixer circuit 107. The output intermediate frequency signal is fed to the receiving intermediate frequency circuit 109. The C-band signal is output from the output port after amplification, filtering and automatic gain control. The receiving local oscillator circuit 108 provides the receiving mixer circuit 107 with a down-conversion local oscillator.

[0008] In the self-test receiving link, the externally input V-band self-test signal is fed from the input port and input to the self-test receiving RF circuit 106. After being attenuated and switched on in the self-test receiving RF circuit 106, it is fed to the receiving mixer circuit 107. Down-conversion is performed in the receiving mixer circuit 107. The output intermediate frequency signal is fed to the receiving intermediate frequency circuit 109. The C-band signal is output from the output port after amplification, filtering and automatic gain control. The receiving local oscillator circuit 108 provides the receiving mixer circuit 107 with a down-conversion local oscillator.

[0009] The reference circuit 110 amplifies and splits the external 100 MHz reference signal and feeds it into the transmitting and receiving local oscillator circuits to provide reference signals for the transmitting local oscillator circuit 102 and the receiving local oscillator circuit 108;

[0010] The power supply monitoring unit provides power supply and control for the transceiver frequency conversion components.

[0011] Furthermore, the transmitting intermediate frequency circuit 101 includes a matching attenuator A, a filter A and an amplifier A connected in sequence; under the action of the power supply monitoring unit 111, it filters and amplifies the C-band intermediate frequency input signal and outputs it to the transmitting mixing circuit 103;

[0012] The transmitting local oscillator circuit 102 and the receiving local oscillator circuit 108 are both phase-locked loop circuits; under the action of the power supply monitoring unit 111, the transmitting and receiving phase-locked loop circuits respectively realize the generation of their own local oscillator signals;

[0013] The transmitting mixing circuit 103 and the receiving mixing circuit 107 both include a mixer, a local oscillator frequency multiplication circuit and a local oscillator filter; wherein the mixer realizes up-conversion and down-conversion of the signal; the local oscillator frequency multiplication circuit is composed of two stages of 2-frequency multipliers, and under the action of the power supply monitoring unit 111, realizes 4-fold frequency multiplication of the fundamental wave signal to generate the local oscillator signal required for mixing; the local oscillator filter is located after the first stage of the 2-frequency multiplier, and realizes signal filtering after frequency multiplication to filter out useless harmonic components;

[0014] Furthermore,

[0015] The transmitting RF circuit 104 includes an attenuator chip A, a V-band amplifier, a microstrip-waveguide transition and a waveguide filter A connected in sequence; the attenuator chip A realizes inter-stage matching of the signal, and under the action of the power supply monitoring unit 111, the V-band amplifier amplifies the V-band signal output by the mixing; the microstrip-waveguide transition completes the conversion of the V-band transmitting signal from microstrip line transmission to waveguide transmission; the waveguide filter A realizes the filtering of the local oscillator leakage signal and the out-of-band modulation spurious signal.

[0016] Furthermore,

[0017] The receiving radio frequency circuit 105 includes a waveguide filter B, a waveguide-microstrip transition B, an attenuator chip B, a V-band low noise amplifier and a single-pole double-throw switch connected in sequence; the waveguide filter B realizes the blocking function while also suppressing the out-of-band image spurious signal; the waveguide-microstrip transition realizes the conversion of the V-band receiving signal from waveguide transmission to microstrip line transmission; the attenuator chip B realizes the inter-stage matching of the signal; under the action of the power supply monitoring unit 111, the V-band low noise amplifier realizes the low-noise amplification of the V-band receiving signal; the single-pole double-throw switch realizes the time-sharing switching between the communication mode and the self-test mode.

[0018] Furthermore,

[0019] The self-test receiving RF circuit 106 includes a waveguide-microstrip transition C, an attenuator chip CI, a single-pole single-throw switch, an attenuator chip CII and a single-pole double-throw switch connected in sequence; the waveguide-microstrip transition C realizes the conversion of the RF self-test signal from waveguide transmission to microstrip line transmission, wherein the RF self-test signal has the same frequency as the RF transmission output signal, and is coupled by the RF transmission output signal through an external coupler; the attenuator chip CI and the attenuator chip CII realize inter-stage matching of the signal; under the action of the power supply monitoring unit 111, the single-pole single-throw switch is used to improve the signal isolation between the communication mode and the closed-loop self-test mode, and the single-pole double-throw switch realizes the time-sharing switching between the communication mode and the self-test mode.

[0020] Furthermore,

[0021] The receiving intermediate frequency circuit 109 includes a matching attenuator B, a filter B, an amplifier B and an automatic gain control circuit; the matching attenuator B realizes inter-stage matching of the signal; the filter B realizes the suppression of out-of-band mixing and intermodulation spurious; under the action of the power supply monitoring unit 111, the amplifier B realizes the amplification of the output C-band intermediate frequency signal; the automatic gain control circuit realizes the closed-loop gain control of the output intermediate frequency signal to meet the high dynamic range of the input radio frequency signal, and the output intermediate frequency signal level can remain stable.

[0022] Furthermore,

[0023] The reference circuit 110 includes a matching attenuator C, an amplifier C and a power divider; the matching attenuator C realizes inter-stage matching and level adjustment of the reference signal; under the action of the power supply monitoring unit 111, the amplifier C realizes amplification of the 100MHz reference signal; the power divider realizes branching of the 100MHz reference signal, and the branched signals are respectively connected to the transmitting local oscillator circuit 102 and the receiving local oscillator circuit 108.

[0024] Furthermore, the power supply monitoring unit 111 includes a transmitting voltage stabilization circuit, a receiving voltage stabilization circuit, an ARM processor and a CAN interface circuit; the transmitting voltage stabilization circuit realizes linear voltage stabilization from +5.5V to +5V and linear voltage stabilization from +5V to +3.3V respectively, and after voltage stabilization, the +5V and +3.3V DC voltages provide power for the transmitting link, the ARM processor and the CAN interface circuit; the receiving voltage stabilization circuit realizes linear voltage stabilization from +5.5V to +5V and linear voltage stabilization from +5V to +3.3V respectively, and after voltage stabilization, the +5V and +3.3V DC voltages provide power for the receiving link, the self-test receiving link and the reference circuit; the ARM processor realizes the sending of remote control parameters and the reporting of telemetry parameters; the CAN interface circuit realizes the external CAN interface communication of the component.

[0025] Furthermore, the phase-locked loop circuits in the transmitting local oscillator circuit 102 and the receiving local oscillator circuit 108 are both of the LMX2595+passive loop filter architecture, with a reference frequency of 100 MHz, and communicate with the power supply monitoring unit 111 through an SPI interface; under the action of the power supply monitoring unit 111, the transmitting local oscillator circuit 102 outputs two frequencies of 13.55 GHz and 13.75 GHz in time-sharing, and the receiving local oscillator circuit 108 outputs four frequencies of 14.225 GHz, 14.425 GHz, 16.4 GHz and 16.6 GHz in time-sharing, where the latter two frequencies correspond to the closed-loop self-test mode.

[0026] Furthermore, the automatic gain control circuit in the receiving intermediate frequency circuit 109 is composed of an analog attenuator, an amplifier C, a splitter and a detector; one end of the analog attenuator is used as an input, and the other end is connected to the amplifier C; the amplified signal is split by the splitter to realize the splitting of the output intermediate frequency signal, and is respectively connected to the output port and the detector; the detector converts one intermediate frequency signal output by the splitter into a DC voltage, and the DC voltage is used as the analog attenuator control voltage after conversion by the operational amplifier to control the attenuation of the attenuator to achieve the purpose of stabilizing the signal level at the output port.

[0027] Compared with the background technology, the present invention has the following advantages:

[0028] 1. In the present invention, the radio frequency signal is in the V band and has a high operating frequency. For the up-conversion channel, the intermediate frequency signal has a frequency range of 5350MHz±250MHz, and the radio frequency works in two frequency bands of 59.3GHz~59.8GHz and 60.1GHz~60.6GHz in time-sharing mode, and the corresponding local oscillator signal frequencies are 54.2GHz and 55GHz respectively; for the down-conversion channel, the intermediate frequency signal has a frequency range of 2650MHz±250MHz, and the radio frequency works in two frequency bands of 62.7GHz~63.2GHz and 63.5GHz~64.0GHz in time-sharing mode, and the corresponding local oscillator signal frequencies are 65.6GHz and 66.4GHz respectively.

[0029] 2. The present invention has a radio frequency self-test mode. In this mode, the up-converted output signal is coupled out through an external coupler as a radio frequency input signal for closed-loop self-test, and the receiving local oscillator circuit and the radio frequency switch need to be switched in conjunction. In terms of the receiving local oscillator circuit, in the radio frequency self-test mode, the radio frequency input signal frequency is in two frequency bands of 59.3GHz to 59.8GHz and 60.1GHz to 60.6GHz. In order to meet the requirement of the intermediate frequency output signal frequency of 2650MHz±250MHz, the receiving local oscillator signal should be switched to 56.9GHz and 57.7GHz respectively; in terms of radio frequency switch switching, in the normal receiving mode, the single-pole double-throw switch on the receiving radio frequency circuit needs to be switched to the receiving radio frequency branch, and the single-pole single-throw switch on the self-test receiving radio frequency circuit is in the off state. In the radio frequency self-test mode, the single-pole double-throw switch on the receiving radio frequency circuit needs to be switched to the radio frequency self-test branch, and the single-pole single-throw switch on the self-test receiving radio frequency circuit is in the closed state.

[0030] 3. In the present invention, an automatic gain control (AGC) circuit is integrated in the receiving intermediate frequency circuit, so that the output intermediate frequency signal can be stably output at a fixed level under a large dynamic range of the RF input signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is the whole machine electrical principle block diagram of the present invention.

[0032] Figure 2 It is a principle block diagram of the transmitting radio frequency circuit of the present invention.

[0033] Figure 3 It is a principle block diagram of the self-checking receiving radio frequency circuit and the receiving radio frequency circuit of the present invention.

[0034] Figure 4 It is a principle block diagram of the transmitting local oscillator circuit and the receiving local oscillator circuit of the present invention.

[0035] Figure 5 It is a principle block diagram of the radio frequency mixing circuit of the present invention.

[0036] Figure 6It is a block diagram of the AGC principle of the intermediate frequency receiving circuit in the present invention. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] An integrated V-band transceiver frequency conversion component with a closed-loop self-checking function, comprising a transmitting intermediate frequency circuit, a transmitting local oscillator circuit, a transmitting mixing circuit, a transmitting radio frequency circuit, a receiving radio frequency circuit, a self-checking receiving radio frequency circuit, a receiving mixing circuit, a receiving local oscillator circuit, a receiving intermediate frequency circuit, a reference circuit and a power supply monitoring unit;

[0039] The transmitting intermediate frequency circuit includes a matching attenuator, a filter and an amplifier. Under the action of the power supply monitoring unit, it filters and amplifies the C-band intermediate frequency input signal and outputs it to the transmitting mixing circuit.

[0040] The transmitting local oscillator circuit and the receiving local oscillator circuit have the same configuration, both of which are phase-locked loop circuits. Under the action of the power supply monitoring unit, the transmitting and receiving phase-locked loop circuits respectively realize the generation of their own local oscillator signals (fundamental waves).

[0041] The transmitting mixing circuit and the receiving mixing circuit have the same configuration, both including a mixer, a local oscillator frequency multiplication circuit and a local oscillator filter. The mixer realizes up-conversion and down-conversion of the signal; the local oscillator frequency multiplication circuit is composed of two stages of 2-frequency multipliers, which realizes 4-fold frequency multiplication of the fundamental wave signal under the action of the power supply monitoring unit to generate the local oscillator signal required for mixing; the local oscillator filter is located after the first stage of the 2-frequency multiplier to realize signal filtering after frequency multiplication to filter out useless harmonic components.

[0042] The transmitting radio frequency circuit includes a V-band amplifier, a matching attenuator, a microstrip waveguide transition and a waveguide filter. Under the action of the power supply monitoring unit, the V-band amplifier amplifies the V-band signal output by the mixer; the matching attenuator realizes the inter-stage matching of the signal; the microstrip waveguide transition completes the conversion of the V-band transmitting signal from microstrip line transmission to waveguide transmission; the waveguide filter realizes the filtering of the local oscillator leakage signal and the out-of-band modulation spurious signal.

[0043] The receiving radio frequency circuit includes a waveguide filter, a waveguide-microstrip transition, a matching attenuator, a V-band low-noise amplifier, and a single-pole double-throw switch. The waveguide filter realizes the blocking function while suppressing the image spurious signal; the waveguide-microstrip transition realizes the conversion of the V-band receiving signal from waveguide transmission to microstrip line transmission; the matching attenuator realizes the inter-stage matching of the signal; under the action of the power supply monitoring unit, the V-band low-noise amplifier realizes the low-noise amplification of the V-band receiving signal; the mode selection single-pole double-throw switch realizes the time-sharing switching between the communication mode and the self-test mode.

[0044] The self-test receiving radio frequency circuit includes a waveguide-microstrip transition, a matching attenuator, a single-pole single-throw switch and a single-pole double-throw switch. The waveguide-microstrip transition realizes the conversion of the transmission coupling signal from waveguide transmission to microstrip line transmission; the matching attenuator realizes the inter-stage matching of the signal; under the action of the power supply monitoring unit, the single-pole single-throw switch is used to improve the signal isolation between the communication mode and the closed-loop self-test mode.

[0045] The receiving intermediate frequency circuit includes a matching attenuator, a filter, an amplifier and an automatic gain control circuit. The matching attenuator realizes inter-stage matching of the signal; the filter realizes suppression of out-of-band mixing and intermodulation spurious; under the action of the power supply monitoring unit, the amplifier realizes amplification of the output C-band intermediate frequency signal; the automatic gain control circuit realizes closed-loop gain control of the output intermediate frequency signal to meet the high dynamic range of the input radio frequency signal, and the output intermediate frequency signal is stable within a certain level range.

[0046] The reference circuit includes a matching attenuator, an amplifier and a power divider. The matching attenuator realizes the inter-stage matching of the signal; under the action of the power supply monitoring unit, the amplifier realizes the amplification of the 100MHz reference signal; the power divider realizes the four-way branching of the 100MHz reference signal, the first way is connected to the transmitting local oscillator circuit; the second way is connected to the receiving local oscillator circuit; the third way is connected to the reference signal detector, and the detection voltage is reported to the power supply monitoring unit; the fourth way is connected to other extensions.

[0047] The power supply monitoring unit includes a transmitting voltage stabilizing circuit, a receiving voltage stabilizing circuit, an ARM processor and a CAN interface circuit. The transmitting voltage stabilizing circuit realizes linear voltage stabilization from +5.5V to +5V and linear voltage stabilization from +5V to +3.3V respectively, and after voltage stabilization, the +5V and +3.3V DC voltages provide power for the transmitting link, the ARM processor and the CAN interface circuit; the receiving voltage stabilizing circuit realizes linear voltage stabilization from +5.5V to +5V and linear voltage stabilization from +5V to +3.3V respectively, and after voltage stabilization, the +5V and +3.3V DC voltages provide power for the receiving link and the reference circuit amplifier; the ARM processor realizes the sending of remote control parameters and the reporting of telemetry parameters; the CAN interface circuit realizes the external CAN interface communication of the component.

[0048] The phase-locked loop circuits in the transmitting local oscillator circuit and the receiving local oscillator circuit are both of the "LMX2595+passive loop filter" architecture, with a reference frequency of 100MHz, and communicate with the power supply monitoring unit through an SPI interface. Under the action of the power supply monitoring unit, the transmitting local oscillator circuit outputs two frequencies of 13.55GHz and 13.75GHz in time-sharing, and the receiving local oscillator circuit outputs four frequencies of 14.225GHz, 14.425GHz, 16.4GHz, and 16.6GHz in time-sharing.

[0049] The automatic gain control circuit in the receiving intermediate frequency circuit is composed of an analog attenuator, an amplifier, a splitter and a detector. The splitter realizes the branching of the output intermediate frequency signal, which is connected to the output port and the detector respectively. The detector converts one intermediate frequency signal output by the splitter into a DC voltage, which is converted by the operational amplifier as the analog attenuator control voltage to control the attenuation of the attenuator to achieve the purpose of stabilizing the signal level of the output port.

[0050] like Figure 1 As shown, an integrated V-band transceiver frequency conversion component with a closed-loop self-test function is characterized in that it includes an up-conversion channel composed of a transmitting intermediate frequency circuit, a transmitting local oscillator circuit, a transmitting mixing circuit and a transmitting radio frequency circuit, and a down-conversion channel composed of a receiving radio frequency circuit, a self-test receiving radio frequency circuit, a receiving mixing circuit, a receiving local oscillator circuit and a receiving intermediate frequency circuit, the reference circuit provides a local oscillator reference signal for the two frequency conversion channels, and the power supply monitoring unit provides power supply and control signals for the two frequency conversion channels.

[0051] The brief working principle of the present invention is as follows: the transmitting component has three links, a transmitting link, a receiving link and a self-check receiving link. In the transmitting link, the external input C-band intermediate frequency signal is fed from the input port and input to the transmitting intermediate frequency circuit. After attenuation, filtering and amplification in the transmitting intermediate frequency circuit, it is fed into the transmitting mixing circuit, and up-conversion is performed in the mixing circuit. The output radio frequency signal is fed into the transmitting radio frequency circuit. The V-band signal is output after amplification, microstrip waveguide transition and waveguide filtering. The transmitting local oscillator circuit provides an up-conversion local oscillator for the transmitting mixing circuit. In the receiving link, the external input V-band radio frequency signal is fed from the input port and input to the receiving radio frequency circuit. After amplification, attenuation and switch selection in the receiving radio frequency circuit, it is fed into the receiving mixing circuit, and down-conversion is performed in the mixing circuit. The output intermediate frequency signal is fed into the receiving intermediate frequency circuit. The C-band signal is output from the output port after amplification, filtering and automatic gain control. The receiving local oscillator circuit provides a down-conversion local oscillator for the receiving mixing circuit. In the self-test receiving link, the external input V-band self-test signal is fed from the input port and input to the self-test receiving RF circuit. After attenuation and switch selection in the circuit, it is fed into the receiving mixing circuit. The self-test receiving link and the receiving link are different only in the RF receiving circuit, and the rest are common circuits. The reference circuit amplifies and divides the external 100MHz reference signal and feeds it into the transmitting and receiving local oscillator circuits to provide a reference signal for the phase-locked loop circuit. The power supply monitoring unit provides power and control for the transceiver frequency conversion components. In terms of component connectors, the C intermediate frequency interface and the external reference input interface connector models are both SSMA-KFD123, the V-band signal interface is the WR15 waveguide port, and the power supply and monitoring interface is J30J-37ZKP.

[0052] like Figure 2As shown, the transmitting radio frequency circuit is a micro-assembled circuit, including a V-band amplifier, an attenuator chip, a microstrip waveguide transition and a waveguide filter. The V-band amplifier amplifies the V-band signal output by the mixer, and its model is NC10383C-5565; the attenuator chip realizes the inter-stage matching of the signal, and its model is NC1388C-167; the microstrip waveguide transition completes the conversion of the V-band transmitting signal from microstrip line transmission to waveguide transmission, and the microstrip probe is in the form of a high-low impedance line, and the waveguide direction is 90° to the microstrip line direction; the waveguide filter realizes the filtering of the local oscillator leakage signal and the out-of-band modulation spurious signal, and its model is BPF59.3-60.6GW-4899.

[0053] like Figure 3 As shown, the receiving radio frequency circuit includes a waveguide filter, a waveguide-microstrip transition, a microstrip probe, an attenuator chip, a V-band low-noise amplifier, and a mode selection single-pole double-throw switch. The waveguide filter realizes the blocking function while suppressing the image stray signal; the waveguide-microstrip transition realizes the conversion of the V-band receiving signal from waveguide transmission to microstrip line transmission, the microstrip probe is in the form of a high-low impedance line, and the waveguide direction is 90° to the microstrip line direction; the matching attenuator realizes the inter-stage matching of the signal; under the action of the power supply monitoring unit, the V-band low-noise amplifier realizes the low-noise amplification of the V-band receiving signal; the mode selection single-pole double-throw switch realizes the time-sharing switching of the communication mode and the self-test mode. In the normal communication mode, the single-pole double-throw switch is switched to the communication branch, and the single-pole single-throw switch on the self-test branch is in the off state to increase the isolation of the two modes. The waveguide filter model is BPF62.7-64GW-5116, the V-band low noise amplifier model is MWL105, and the single-pole double-throw switch model is NC1698C-4565.

[0054] The self-test receiving RF circuit includes a waveguide-microstrip transition, a microstrip probe, an attenuator chip, a single-pole single-throw switch and a single-pole double-throw switch. The waveguide-microstrip transition realizes the conversion of the transmit coupling signal from waveguide transmission to microstrip line transmission; the matching attenuator realizes the inter-stage matching of the signal; under the action of the power supply monitoring unit, the single-pole single-throw switch is used to improve the signal isolation between the communication mode and the closed-loop self-test mode. In the self-test mode, the single-pole single-throw switch is in a closed state, and the single-pole double-throw switch is switched to the self-test branch. The single-pole single-throw switch model is NC16167C-5065, and the single-pole single-throw switch model is NC1698C-4565.

[0055] like Figure 4As shown, the phase-locked loop circuits in the transmitting local oscillator circuit and the receiving local oscillator circuit are both of the "LMX2595+passive loop filter" architecture, with a reference frequency of 100MHz, and communicate with the power supply monitoring unit through the SPI interface. Under the action of the power supply monitoring unit, the transmitting local oscillator circuit outputs two frequencies of 13.55GHz and 13.75GHz in time-sharing, and the receiving local oscillator circuit outputs four frequencies of 14.225GHz, 14.425GHz 16.4GHz and 16.6GHz in time-sharing. The phase detector model is LMX2595, and the amplifier model is NC10223C-1218A.

[0056] like Figure 5 As shown, the transmitting mixing circuit and the receiving mixing circuit have the same configuration, both including a mixer, a local oscillator frequency multiplication circuit and a local oscillator filter. The mixer realizes up-conversion and down-conversion of the signal; the local oscillator frequency multiplication circuit is composed of two stages of 2-frequency multipliers, which realizes 4-fold frequency multiplication of the fundamental wave signal under the action of the power supply monitoring unit to generate the local oscillator signal required for mixing; the local oscillator filter is located after the first stage of the 2-frequency multiplier to realize signal filtering after frequency multiplication to filter out useless harmonic components. Corresponding to the up-conversion channel, the local oscillator frequency of the transmitting local oscillator circuit is 54.2GHz and 55GHz after 4 times of frequency multiplication; corresponding to the communication down-conversion channel, the local oscillator frequency of the receiving local oscillator circuit is 65.6GHz and 66.4GHz after 4 times of frequency multiplication; corresponding to the self-test down-conversion channel, the local oscillator frequency of the receiving local oscillator circuit is 56.9GHz and 57.7GHz after 4 times of frequency multiplication; the mixer model is NC17151C-5266, the two-stage frequency multiplier models are NC17731C-2436 and NC17719C-5466 respectively, and the local oscillator filter is a MEMS filter, model SiMF30R4_8-7W2.

[0057] like Figure 6 As shown, the automatic gain control circuit in the receiving intermediate frequency circuit is composed of an analog attenuator, an amplifier, a splitter and a detector. The splitter realizes the branching of the output intermediate frequency signal, which is respectively connected to the output port and the detector. The detector converts one intermediate frequency signal output by the splitter into a DC voltage, which is used as the analog attenuator control voltage after conversion by the operational amplifier to control the attenuation of the attenuator to achieve the purpose of stabilizing the signal level of the output port. The analog attenuator model is BW871, the amplifier model is NC1074C-0835A, the power divider model is NC6523C-104U, and the detector is a detector diode, model 2H10673B.

[0058] The device has the characteristics of high frequency, support for RF self-test, and AGC function, making it very suitable for use as a transceiver frequency conversion channel payload in low-orbit Internet satellite communication systems.

[0059] It should be understood that the above description of the specific implementation methods of this patent is only an exemplary description listed to facilitate ordinary technicians in the field to understand the patent scheme, and does not imply that the scope of protection of this patent is limited to these individual examples. Ordinary technicians in this field can fully understand the technical scheme of this patent and, without any creative work, obtain more specific implementation methods by combining technical features, replacing some technical features, adding more technical features, etc. to the examples listed in this patent. All these specific implementation methods are within the scope of the claims of this patent. Therefore, these new specific implementation methods should also be within the scope of protection of this patent.

Claims

1. An integrated V-band transceiver frequency conversion component with closed-loop self-checking function, characterized in that: It comprises a transmitting intermediate frequency circuit (101), a transmitting local oscillator circuit (102), a transmitting mixing circuit (103), a transmitting radio frequency circuit (104), a receiving radio frequency circuit (105), a self-checking receiving radio frequency circuit (106), a receiving mixing circuit (107), a receiving local oscillator circuit (108), a receiving intermediate frequency circuit (109), a reference circuit (110) and a power supply monitoring unit (111); In the transmission link, an externally input C-band intermediate frequency signal is fed from an input port and input to a transmission intermediate frequency circuit (101). After being attenuated, filtered and amplified in the transmission intermediate frequency circuit (101), the signal is fed to a transmission mixing circuit (103). Up-conversion is performed in the transmission mixing circuit (103). The output radio frequency signal is fed to a transmission radio frequency circuit (104). The V-band signal is output after being amplified, microstrip waveguide transitioned and waveguide filtered. The transmission local oscillator circuit (102) provides an up-conversion local oscillator for the transmission mixing circuit (103). In the receiving link, an externally input V-band radio frequency signal is fed from an input port and input to a receiving radio frequency circuit (105). After being amplified, attenuated and switched in the receiving radio frequency circuit (105), the signal is fed to a receiving mixer circuit (107). Down-conversion is performed in the receiving mixer circuit (107). The output intermediate frequency signal is fed to a receiving intermediate frequency circuit (109). After being amplified, filtered and automatically gain-controlled, a C-band signal is output from an output port. A receiving local oscillator circuit (108) provides a down-conversion local oscillator for the receiving mixer circuit (107). In the self-check receiving link, an externally input V-band self-check signal is fed from an input port and input to a self-check receiving radio frequency circuit (106). After being attenuated and switched on in the self-check receiving radio frequency circuit (106), the signal is fed to a receiving mixing circuit (107). Down-conversion is performed in the receiving mixing circuit (107). The output intermediate frequency signal is fed to a receiving intermediate frequency circuit (109). After being amplified, filtered and automatically gain-controlled, the C-band signal is output from an output port. A receiving local oscillator circuit (108) provides a down-conversion local oscillator for the receiving mixing circuit (107). The reference circuit (110) amplifies and splits an external 100 MHz reference signal and feeds it into a transmitting and receiving local oscillator circuit to provide a reference signal for a transmitting local oscillator circuit (102) and a receiving local oscillator circuit (108); The power supply monitoring unit provides power supply and control for the transceiver frequency conversion components.

2. The integrated V-band transceiver frequency conversion component with closed-loop self-checking function according to claim 1, characterized in that: The transmitting intermediate frequency circuit (101) comprises a matching attenuator A, a filter A and an amplifier A connected in sequence; under the action of a power supply monitoring unit (111), it filters and amplifies a C-band intermediate frequency input signal and outputs it to a transmitting mixing circuit (103); The transmitting local oscillator circuit (102) and the receiving local oscillator circuit (108) are both phase-locked loop circuits; under the action of the power supply monitoring unit (111), the transmitting and receiving phase-locked loop circuits respectively realize the generation of their own local oscillator signals; The transmitting mixing circuit (103) and the receiving mixing circuit (107) both include a mixer, a local oscillator frequency multiplication circuit and a local oscillator filter; wherein the mixer realizes up-conversion and down-conversion of the signal; the local oscillator frequency multiplication circuit is composed of two stages of 2-fold frequency multipliers, and under the action of the power supply monitoring unit (111), realizes 4-fold frequency multiplication of the fundamental wave signal to generate the local oscillator signal required for mixing; the local oscillator filter is located after the first stage of the 2-fold frequency multiplier, and realizes signal filtering after frequency multiplication to filter out useless harmonic components.

3. The integrated V-band transceiver frequency conversion component with closed-loop self-checking function according to claim 1, characterized in that: The transmitting radio frequency circuit (104) comprises an attenuator chip A, a V-band amplifier, a microstrip-waveguide transition and a waveguide filter A connected in sequence; the attenuator chip A realizes inter-stage matching of signals, and under the action of the power supply monitoring unit (111), the V-band amplifier amplifies the V-band signal output by the mixing; the microstrip-waveguide transition completes the conversion of the V-band transmitting signal from microstrip line transmission to waveguide transmission; and the waveguide filter A realizes filtering of local oscillator leakage signals and out-of-band modulation spurious signals.

4. The integrated V-band transceiver frequency conversion component with closed-loop self-checking function according to claim 1, characterized in that: The receiving radio frequency circuit (105) comprises a waveguide filter B, a waveguide-microstrip transition B, an attenuator chip B, a V-band low noise amplifier and a single-pole double-throw switch connected in sequence; the waveguide filter B realizes the blocking function while also suppressing out-of-band image spurious signals; the waveguide-microstrip transition realizes the conversion of the V-band receiving signal from waveguide transmission to microstrip line transmission; the attenuator chip B realizes inter-stage matching of the signal; under the action of the power supply monitoring unit (111), the V-band low noise amplifier realizes low-noise amplification of the V-band receiving signal; the single-pole double-throw switch realizes time-sharing switching between the communication mode and the self-test mode.

5. The integrated V-band transceiver frequency conversion component with closed-loop self-checking function according to claim 1, characterized in that: The self-test receiving radio frequency circuit (106) comprises a waveguide-microstrip transition C, an attenuator chip CI, a single-pole single-throw switch, an attenuator chip CII and a single-pole double-throw switch connected in sequence; the waveguide-microstrip transition C realizes the conversion of the radio frequency self-test signal from waveguide transmission to microstrip line transmission, wherein the radio frequency self-test signal has the same frequency as the radio frequency transmission output signal, and is obtained by coupling the radio frequency transmission output signal through an external coupler; the attenuator chip CI and the attenuator chip CII realize inter-stage matching of the signal; under the action of the power supply monitoring unit (111), the single-pole single-throw switch is used to improve the signal isolation between the communication mode and the closed-loop self-test mode, and the single-pole double-throw switch realizes the time-sharing switching between the communication mode and the self-test mode.

6. The integrated V-band transceiver frequency conversion component with closed-loop self-checking function according to claim 1, characterized in that: The receiving intermediate frequency circuit (109) comprises a matching attenuator B, a filter B, an amplifier B and an automatic gain control circuit; the matching attenuator B realizes inter-stage matching of signals; the filter B realizes suppression of out-of-band mixing intermodulation spurious; under the action of the power supply monitoring unit (111), the amplifier B realizes amplification of the output C-band intermediate frequency signal; The automatic gain control circuit realizes closed-loop gain control of the output intermediate frequency signal to ensure that the output intermediate frequency signal level remains stable under the high dynamic range of the input RF signal.

7. The integrated V-band transceiver frequency conversion component with closed-loop self-checking function according to claim 1, characterized in that: The reference circuit (110) comprises a matching attenuator C, an amplifier C and a power divider; the matching attenuator C realizes inter-stage matching and level adjustment of the reference signal; under the action of the power supply monitoring unit (111), the amplifier C realizes amplification of the 100 MHz reference signal; the power divider realizes branching of the 100 MHz reference signal, and the branched signals are respectively connected to the transmitting local oscillator circuit (102) and the receiving local oscillator circuit (108).

8. The integrated V-band transceiver frequency conversion component with closed-loop self-checking function according to claim 1, characterized in that: The power supply monitoring unit (111) comprises a transmitting voltage stabilizing circuit, a receiving voltage stabilizing circuit, an ARM processor and a CAN interface circuit; the transmitting voltage stabilizing circuit realizes linear voltage stabilization from +5.5V to +5V and linear voltage stabilization from +5V to +3.3V respectively, and after voltage stabilization, the +5V and +3.3V DC voltages provide power for the transmitting link, the ARM processor and the CAN interface circuit; the receiving voltage stabilizing circuit realizes linear voltage stabilization from +5.5V to +5V and linear voltage stabilization from +5V to +3.3V respectively, and after voltage stabilization, the +5V and +3.3V DC voltages provide power for the receiving link, the self-test receiving link and the reference circuit; the ARM processor realizes the sending of remote control parameters and the reporting of telemetry parameters; the CAN interface circuit realizes the external CAN interface communication of the component.

9. The integrated V-band transceiver frequency conversion component with closed-loop self-checking function according to claim 1, characterized in that: The phase-locked loop circuits in the transmitting local oscillator circuit (102) and the receiving local oscillator circuit (108) are both of the LMX2595+passive loop filter architecture, with a reference frequency of 100 MHz, and communicate with the power supply monitoring unit (111) via an SPI interface; under the action of the power supply monitoring unit (111), the transmitting local oscillator circuit (102) outputs two frequency points of 13.55 GHz and 13.75 GHz in a time-sharing manner, and the receiving local oscillator circuit (108) outputs four frequency points of 14.225 GHz, 14.425 GHz, 16.4 GHz and 16.6 GHz in a time-sharing manner, wherein the first two frequency points correspond to a closed-loop self-test mode.

10. The integrated V-band transceiver frequency conversion component with closed-loop self-checking function according to claim 6, characterized in that: The automatic gain control circuit in the intermediate frequency receiving circuit (109) is composed of an analog attenuator, an amplifier D, a splitter and a detector; one end of the analog attenuator is used as an input, and the other end is connected to the amplifier D; the amplified signal is split into intermediate frequency signals by the splitter, and respectively connected to the output port and the detector; the detector converts one intermediate frequency signal output by the splitter into a direct current voltage, and the direct current voltage is converted by the operational amplifier and used as an analog attenuator control voltage to control the attenuation of the attenuator to achieve the purpose of stabilizing the signal level of the output port, and is also reported to the power supply monitoring unit (111) as an AGC voltage.

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