CN117805752B - Integrated integrated radar signal simulator - Google Patents
Integrated integrated radar signal simulator Download PDFInfo
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- CN117805752B CN117805752B CN202410133132.5A CN202410133132A CN117805752B CN 117805752 B CN117805752 B CN 117805752B CN 202410133132 A CN202410133132 A CN 202410133132A CN 117805752 B CN117805752 B CN 117805752B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
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Abstract
The invention relates to the technical field of radar signal simulation, and discloses an integrated radar signal simulator and a signal simulator, wherein the integrated radar signal simulator comprises a radio frequency receiving and transmitting module, a frequency source module, a baseband signal processing module and an antenna module, a received radio frequency signal comprises 0.1 GHz-18 GHz, 18 GHz-40 GHz radar excitation signals and 4 GHz-8 GHz altimeter simulation signals, the baseband signal processing module realizes digital modulation and altimeter simulation of various target signals, and corresponding radio frequency output signals are obtained after up-conversion processing. The invention can generate signals of various types, has wide coverage frequency range, and has the advantages of small equipment volume, portability and the like.
Description
Technical Field
The invention relates to the technical field of radar signal simulation, in particular to an integrated radar signal simulator.
Background
And the radar signal simulator is used for simulating simple or complex radar target signals so as to finish the functional test of the radar and the radar seeker. The radar signal simulation generating equipment is core equipment of radar and radar seeker testing equipment, can complete multiple signal simulations of different radars and radar seekers according to requirements, and can complete simulation tests and experiments of various complex radar signals under the cooperation of other subsystems.
The simulator is used as a necessary trend of the development of various complex equipment, maintenance and operation training, the traditional radar signal simulator is based on single radar signals for simulation output, has simple simulation waveforms and less frequency band coverage, can not meet the signal simulation of multi-type radars and radar seekers under more and more complex electromagnetic environment conditions, has large volume and difficult carrying, and brings more inconvenience to the external field test of the radars and seekers.
Disclosure of Invention
The technical purpose is that: aiming at the problems, the invention provides an integrated radar signal simulator which has the advantages of multiple generated signal patterns, wide coverage frequency range, small equipment volume and portability.
The technical scheme is as follows: in order to achieve the technical purpose, the invention adopts the following technical scheme:
an integrated radar signal simulator host comprises a radio frequency transceiver module, a frequency source module, a baseband signal processing module and an antenna module, wherein,
The frequency source module is used for generating a variable-frequency local oscillation signal and a clock signal, wherein the local oscillation signal comprises a first 21.5GHz local oscillation, a second 20.3 GHz-37.2 GHz local oscillation and a third 34 GHz-44 GHz local oscillation;
the radio frequency transceiver module is used for carrying out frequency conversion processing on received and transmitted signals, and the received radio frequency signals comprise 0.1 GHz-18 GHz radar excitation signals, 18 GHz-40 GHz radar excitation signals and 4 GHz-8 GHz altimeter analog signals;
The baseband signal processing module adopts a second Nyquist sampling processing method and mainly realizes various digital modulations and altimeter simulation of target signals with the frequency range of 2.3 GHz-3.3 GHz;
the antenna module comprises a first receiving and transmitting antenna of 0.1 GHz-18 GHz and a second receiving and transmitting antenna of 18 GHz-40 GHz, and the first receiving and transmitting antenna is used for receiving and transmitting the radio frequency signals.
The antenna module comprises a first receiving and transmitting antenna of 0.1 GHz-18 GHz and a second receiving and transmitting antenna of 18 GHz-40 GHz, and the first receiving and transmitting antenna is used for receiving and transmitting the radio frequency signals.
Preferably, the radio frequency transceiver module comprises a radio frequency receiving module, and the radio frequency receiving module is provided with a first front end processing module, a second front end processing module and a frequency conversion processing module; wherein,
The first front-end processing module is provided with a first input port, a first limiter, a first band-pass filter of 18 GHz-40 GHz, a first switch selection branch, a first digital control attenuator, a first amplifier, a first mixer and a second band-pass filter of 5 GHz-15 GHz, which are sequentially connected, wherein the first input port is used for receiving 0.1 GHz-18 GHz radar excitation signals, an IO end of the first mixer receives 34 GHz-44 GHz local oscillation three, an RF end receives an output signal of the first amplifier, and an output signal of the IF end is input into the second band-pass filter to output 5 GHz-15 GHz radio frequency signals after filtering;
The second front end processing module is provided with a second input port, a third input port, a first single-pole double-throw switch, a second switch selection branch, a second digital control attenuator and a second amplifier which are sequentially connected, wherein the second input port is provided with a second limiter, a 30dB fixed attenuator and a third band-pass filter of 4-8 GHz, which are sequentially connected, and is used for receiving 4-8 GHz altimeter analog signals and sequentially performing limiting, attenuation and filtering processing, the third input port is provided with a third limiter and a fourth band-pass filter of 0.1-18 GHz, which are sequentially connected, and is used for receiving 0.1-18 GHz radar excitation signals and sequentially performing limiting and filtering processing, the first single-pole double-throw switch is used for receiving output signals of the third band-pass filter and the fourth filter and selectively inputting the output signals of the second switch selection branch, and the second amplifier outputs 0.1-18 GHz radio frequency signals;
The frequency conversion processing module comprises a second single-pole double-throw switch, a second mixer, a fifth band-pass filter of 19.2 GHz-20.2 GHz, a third mixer, a sixth band-pass filter of 1.3 GHz-2.3 GHz, a fourth amplifier and a power divider which are sequentially connected, wherein the power divider outputs two paths of signals, one path of signals is input into the fifth amplifier and the seventh band-pass filter of 1.3 GHz-2.3 GHz which are sequentially arranged, the other path of signals is input into the sixth amplifier, the eighth band-pass filter of 1.3 GHz-2.3 GHz, the third digital control attenuator and the detection circuit which are sequentially arranged, and the second single-pole double-throw switch is used for receiving 5 GHz-15 GHz radio frequency signals output by the first front-end processing module and 0.1 GHz-18 GHz radio frequency signals output by the second front-end processing module and selectively inputting the signals to the RF end of the second mixer, and the LO end of the second mixer receives 20.3 GHz-37.2 GHz second local oscillation signals and the output signals of the IF end to be input into the fifth band-pass filter; an LO end of the third mixer receives a 21.5GHz local oscillator I, an IF end receives an output signal of the third amplifier, and an output signal of an RF end is input into a sixth band-pass filter; the frequency conversion processing module is used for carrying out frequency conversion, filtering amplification and power division processing on the input 5 GHz-15 GHz radio frequency signals or 0.1 GHz-18 GHz radio frequency signals, and outputting intermediate frequency signals of 1.3 GHz-2.3 GHz after the filtering processing of a seventh band-pass filter;
The first switch selection branch circuit and the second switch selection branch circuit have the same structure, and the first switch selection branch circuit and the second switch selection branch circuit are conducted by setting the selection switch to select an amplifying branch circuit with 20dB gain and an attenuating branch circuit with 20dB attenuation.
Preferably, the radio frequency transceiver module comprises a radio frequency transmitting module, wherein the radio frequency transmitting module is provided with a two-stage mixing module, a first single-pole three-throw switch, a first up-conversion branch and a second up-conversion branch;
The two-stage mixing module comprises an equalizer, a fourth numerical control attenuator, a seventh amplifier, a ninth band-pass filter of 1.3 GHz-2.3 GHz, an eighth amplifier, a fourth mixer, a tenth band-pass filter of 19.2 GHz-20.2 GHz, a ninth amplifier, a fifth mixer and an eleventh band-pass filter of 0.1 GHz-18 GHz which are sequentially connected; the LO end of the fourth mixer receives a first 21.5GHz local oscillator, the IF end of the fourth mixer receives an output signal of an eighth amplifier, the output signal of the RF end of the fourth mixer is input into a tenth band-pass filter, the LO end of the fifth mixer receives a second 20.3 GHz-37.2 GHz local oscillator, the IF end of the fifth mixer receives an output signal of a ninth amplifier, the output signal of the RF end of the fourth mixer is input into an eleventh band-pass filter, and the output end of the eleventh band-pass filter is connected with a first single-pole three-throw switch;
the first up-conversion branch circuit comprises a third single-pole double-throw switch, a tenth amplifier, a first coupler, a fifth digital control attenuator, a third switch selection branch circuit, a fourth switch selection branch circuit, a first single-pole single-throw switch and a fourth single-pole double-throw switch which are sequentially arranged, wherein two input ends of the fourth single-pole double-throw switch are respectively used as output ends of radio frequency signals of 0.1 GHz-18 GHz and 4 GHz-8 GHz;
The second up-conversion branch circuit comprises a twelfth band-pass filter of 4 GHz-16 GHz, an eleventh amplifier, a sixth mixer, a thirteenth band-pass filter of 18 GHz-40 GHz, a twelfth amplifier, a second coupler, a sixth digital control attenuator, a fifth switch selection branch circuit, a sixth switch selection branch circuit and a second single-pole single-throw switch which are sequentially arranged, and the output end of the second single-pole single-throw switch is used as the output end of a radio frequency signal of 18 GHz-40 GHz.
Preferably, the radio frequency transceiver module, the frequency source module, the baseband signal processing module and the antenna module are all disposed in a customized pci chassis.
The beneficial effects are that: due to the adoption of the technical scheme, the invention has the following beneficial effects:
The system adopts an integrated design, the frequency band covers 0.1 GHz-40 GHz, the signal patterns are more, the application scene is wide, the volume and the total weight are small, and the antenna and the case are integrated into a whole, thereby providing great convenience for the outfield test.
Drawings
FIG. 1 is a schematic diagram of an integrated radar signal simulator of the present invention;
Fig. 2 is a schematic diagram of a radio frequency receiving module according to the present invention;
FIG. 3 is a schematic diagram of a radio frequency transmit module according to the present invention;
fig. 4 is a schematic diagram of a frequency source module according to the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The invention provides an integrated radar signal simulator, which has the advantages that the original antenna module and a radar signal simulator host are of a split type structure, the radar signal simulator host and the antenna module are designed into an integrated structure, and the integrated design of the system improves the portability.
1. System composition and function
The integrated radar signal simulator shown in fig. 1 comprises a radio frequency signal receiving and transmitting module, a baseband signal processing module, a frequency source module and an antenna module, wherein all the modules are placed in a customized 3U 6 slot cPCI case.
A) The radio frequency transceiver module is used for carrying out frequency conversion processing on the received and transmitted signals, and the radio frequency signals comprise 0.1 GHz-18 GHz radar excitation signals, 18 GHz-40 GHz radar excitation signals and 4 GHz-8 GHz altimeter analog signals;
b) The baseband signal processing module adopts a DRFM architecture and a second Nyquist sampling processing method to realize various digital modulations and altimeter simulation of target signals with the frequency range of 2.3 GHz-3.3 GHz;
c) The frequency source module is used for generating a variable-frequency local oscillation signal and a clock signal, wherein the local oscillation signal comprises a first 21.5GHz local oscillation, a second 20.3 GHz-37.2 GHz local oscillation and a third 34 GHz-44 GHz local oscillation;
d) The antenna module comprises a first receiving and transmitting antenna of 0.1 GHz-18 GHz and a second receiving and transmitting antenna of 18 GHz-40 GHz, and the first receiving and transmitting antenna is used for receiving and transmitting the radio frequency signals.
2. Principle of operation
2.1 Radio frequency transceiver module
The radio frequency transceiver module mainly has two functions:
a) And respectively carrying out amplitude limiting, filtering and attenuation treatment on the received radio frequency signals of 0.1 GHz-18 GHz and 4 GHz-8 GHz, and then selectively inputting the signals to subsequent circuits such as attenuation, amplification filtering, frequency mixing and the like through a switch.
The received 18 GHz-40 GHz frequency band signals are subjected to frequency mixing once and then are converted into a 5 GHz-15 GHz scheme, and the 5 GHz-15 GHz radio frequency signals and the 0.1 GHz-18 GHz signals subjected to filtering amplification treatment are selectively input into a subsequent microwave frequency conversion link through a switch.
The radio frequency receiving module of the design adopts a frequency conversion channel with the common frequency range of 0.1 GHz-18 GHz, and adopts a frequency conversion processing mode after changing a broadband signal into a narrowband signal in order to inhibit image frequency signals and out-of-band spurious emissions caused by frequency mixing.
The RF input signal is subjected to amplitude limiting and filtering treatment at the RF front end, is subjected to switching filtering, amplifying and attenuating treatment by an automatic gain control circuit, and is subjected to mixing filtering amplifying treatment to obtain an intermediate frequency signal of 1800MHz +/-500 MHz.
B) The transmitting module of the radio frequency receiving and transmitting module mainly converts 1800MHz + -500 MHz intermediate frequency signals into the same frequency as the received radio frequency signals for output, and carries out pulse modulation and amplitude level control on the signals on the radio frequency band. In the system, a three-time frequency conversion scheme is adopted to convert 1800MHz + -500 MHz intermediate frequency signals into radio frequency signals of 0.1 GHz-40 GHz wave bands. The up-conversion channel of the system shares the 0.1 GHz-18 GHz conversion channel. The amplitude control of 0.1 GHz-18 GHz and 18 GHz-40 GHz comprises two channels, and each channel can independently control the signal amplitude and the pulse modulation function.
The radio frequency transceiver module of the design adopts a narrow-band filtering technology, and can effectively inhibit image signals and out-of-band spurious emissions caused by frequency mixing.
As illustrated in fig. 2, the radio frequency receiving module is provided with a first front-end processing module, a second front-end processing module and a variable frequency processing module; the first front-end processing module is provided with a first input port, a first limiter LM1, a first band-pass filter BPF1 of 18 GHz-40 GHz, a first switch selection branch SW1, a first numerical control attenuator A1, a first amplifier G1, a first mixer M1 and a second band-pass filter BPF2 of 5 GHz-15 GHz, which are sequentially connected, wherein the first input port is used for receiving radar excitation signals of 0.1 GHz-18 GHz, an IO end of the first mixer M1 receives local oscillation three of 34 GHz-44 GHz, an output signal of the first amplifier G1 is received by an RF end, and an output signal of an IF end is input into the second band-pass filter BPF2 and is filtered to output radio frequency signals of 5 GHz-15 GHz.
The second front end processing module is provided with a second input port, a third input port, a first single-pole double-throw switch S1, a second switch selection branch SW2, a second digital control attenuator AT2 and a second amplifier G2 which are sequentially connected, the second input port is provided with a second amplitude limiter LM1, a 30dB fixed attenuator FA1 and a third band-pass filter BPF3 of 4-8 GHz which are sequentially connected, the third input port is provided with the third amplitude limiter LM3 and a fourth band-pass filter BPF4 of 0.1-18 GHz which are sequentially connected, the first single-pole double-throw switch S1 is used for receiving output signals of the third band-pass filter BPF3 and the fourth filter BPF4 and selectively inputting the second switch selection branch SW2, and the second amplifier G2 outputs radio frequency signals of 0.1 GHz-18 GHz.
The frequency conversion processing module comprises a second single-pole double-throw switch S2, a second mixer M2, a fifth band-pass filter BPF5 of 19.2 GHz-20.2 GHz, a third amplifier G3, a third mixer M3, a sixth band-pass filter BPF6 of 1.3 GHz-2.3 GHz, a fourth amplifier G4 and a power divider PD1 which are sequentially connected, wherein the power divider PD1 outputs two paths of signals, one path of the signals is input into a seventh band-pass filter BPF7 of which the fifth amplifier G5 and the first amplifier G1.3 GHz-2.3 GHz are sequentially arranged, the other path of the signals is input into a sixth band-pass filter BPF8 of 1.3 GHz-2.3 GHz, a third digital control attenuator AT3 and a detection circuit which are sequentially arranged, the second single-pole double-throw switch S2 is used for receiving a radio frequency signal of 5 GHz-15 GHz output by the first front end processing module and a radio frequency signal of 0.1 GHz-18 GHz output by the second front end processing module and one path of signals is input into the second mixer M2 GHz signal of 1 GHz-2.3 GHz, and the other path of signals is input into the second mixer M2 GHz signal of 3 GHz-2, and the second mixer is input into the second mixer is connected with the second band-pass filter; the LO end of the third mixer M3 receives a 21.5GHz local oscillator I, the IF end receives an output signal of the third amplifier G3, and an output signal of the RF end is input into a sixth band-pass filter BFP6; the frequency conversion processing module is used for carrying out frequency conversion, filtering amplification and power division processing on the input 5 GHz-15 GHz radio frequency signals or 0.1 GHz-18 GHz radio frequency signals, and outputting intermediate frequency signals of 1.3 GHz-2.3 GHz after the filtering processing of a seventh band-pass filter BPF 7. The first switch selecting branch SW1 and the second switch selecting branch SW2 have the same structure, and include an amplifying branch with 20dB gain and an attenuating branch with 20dB attenuation, which are turned on by setting the selecting switch.
As illustrated in fig. 3, the radio frequency transmitting module is provided with a two-stage mixing module, a first single-pole three-throw switch SS1, a first up-conversion branch and a second up-conversion branch. The two-stage mixing module is used for receiving intermediate frequency modulation signals sent by the intermediate frequency signal processing and control unit and carrying out mixing processing twice to obtain 0.1 GHz-18 GHz radio frequency signals, and the first single-pole three-throw switch SS1 is used for dividing the 0.1 GHz-18 GHz radio frequency signals processed by the two-stage mixing module into three paths: one path of the signals is input into a first up-conversion branch circuit after being attenuated by a second fixed attenuator FA2 with 30dBm and a third fixed attenuator FA3 with 30dBm which are arranged in sequence, one path of the signals is directly input into the first up-conversion branch circuit, and one path of the signals is directly input into a second up-conversion branch circuit.
The two-stage mixing module comprises an equalizer Eq1, a fourth numerical control attenuator AT4, a seventh amplifier G7, a ninth band-pass filter BPF9 of 1.3 GHz-2.3 GHz, an eighth amplifier G8, a fourth mixer M4, a tenth band-pass filter BPF10 of 19.2 GHz-20.2 GHz, a ninth amplifier G9, a fifth mixer M5 and an eleventh band-pass filter BPF11 of 0.1 GHz-18 GHz which are connected in sequence; the LO end of the fourth mixer M4 receives the first 21.5GHz local oscillator, the IF end receives the output signal of the eighth amplifier G8, the output signal of the RF end inputs the tenth bandpass filter BPF10, the LO end of the fifth mixer M5 receives the second 20.3GHz to 37.2GHz local oscillator, the IF end receives the output signal of the ninth amplifier G9, the output signal of the RF end inputs the eleventh bandpass filter BPF11, and the output end of the eleventh bandpass filter BPF11 is connected with the first single-pole three-throw switch SS1.
The first up-conversion branch circuit comprises a third single-pole double-throw switch S3, a tenth amplifier G10, a first coupler CO1, a fifth digital control attenuator AT5, a third switch selection branch circuit SW3, a fourth switch selection branch circuit SW4, a first single-pole single-throw switch SP1 and a fourth single-pole double-throw switch S4 which are sequentially arranged, and two input ends of the fourth single-pole double-throw switch S4 are respectively used as output ends of radio frequency signals of 0.1 GHz-18 GHz and 4 GHz-8 GHz.
The second up-conversion branch circuit comprises a twelfth band-pass filter BPF12, an eleventh amplifier G11, a sixth mixer M6, a thirteenth band-pass filter BPF13 of 18 GHz-40 GHz, a twelfth amplifier G12, a second coupler CO2, a sixth digital control attenuator AT6, a fifth switch selection branch circuit SW5, a sixth switch selection branch circuit SW6 and a second single-pole single-throw switch SP2 which are sequentially arranged, wherein the output end of the second single-pole single-throw switch SP2 is used as the output end of a radio frequency signal of 18 GHz-40 GHz.
2.2 Frequency Source Module
Fig. 4 is a schematic diagram of a frequency source module according to the present invention, where the frequency source module uses a frequency direct synthesis scheme, that is, uses a 100MHz signal as a reference signal, and generates a local oscillator one signal and a local oscillator two signal by frequency division, frequency multiplication, and filtering.
2.3 Baseband Signal processing Module
The baseband signal processing module adopts DRFM technology to realize the modulation and processing of signals, mainly completes the distance simulation, speed simulation, azimuth simulation and amplitude simulation of target signals, and can realize the functions of suppressing interference, deception interference, combining interference signals and the like. Meanwhile, through fine time delay of the radio frequency signals, a high-resolution high-simulation function can be realized. The baseband signal processing module is mainly designed based on an FPGA architecture, and can realize function reconstruction through software customization, thereby facilitating secondary development and function expansion of users.
In the system, target simulation, interference simulation and background signal simulation are all completed in the FPGA, the resources of the FPGA are limited, in the actual design, the resources can be repeatedly utilized, and various signal patterns are distinguished through mode selection.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be appreciated by persons skilled in the art that the above embodiments are not intended to limit the invention in any way, and that all technical solutions obtained by means of equivalent substitutions or equivalent transformations fall within the scope of the invention.
Claims (2)
1. An integrated radar signal simulator, characterized in that: comprises a radio frequency transceiver module, a frequency source module, a baseband signal processing module and an antenna module, wherein,
The frequency source module is used for generating a variable-frequency local oscillation signal and a clock signal, wherein the local oscillation signal comprises a first 21.5GHz local oscillation, a second 20.3 GHz-37.2 GHz local oscillation and a third 34 GHz-44 GHz local oscillation;
The radio frequency transceiver module is used for carrying out frequency conversion processing on received and transmitted signals, and the received radio frequency signals comprise 0.1 GHz-18 GHz radar excitation signals, 18 GHz-40 GHz radar excitation signals and 4 GHz-8 GHz altimeter analog signals;
The baseband signal processing module adopts a second Nyquist sampling processing method to realize various digital modulations and altimeter simulation of target signals with the frequency range of 2.3 GHz-3.3 GHz;
the antenna module comprises a first 0.1 GHz-18 GHz receiving and transmitting antenna and a second 18 GHz-40 GHz receiving and transmitting antenna, and is used for receiving and transmitting the radio frequency signals;
the radio frequency receiving module comprises a radio frequency receiving module, and the radio frequency receiving module is provided with a first front end processing module, a second front end processing module and a frequency conversion processing module; wherein,
The first front-end processing module is provided with a first input port, a first limiter (LM 1), a first band-pass filter (BPF 1) of 18 GHz-40 GHz, a first switch selection branch (SW 1), a first digital control attenuator (AT 1), a first amplifier (G1), a first mixer (M1) and a second band-pass filter (BPF 2) of 5 GHz-15 GHz, which are sequentially connected, wherein the first input port is used for receiving 0.1 GHz-18 GHz radar excitation signals, the IO end of the first mixer (M1) receives 34 GHz-44 GHz local oscillation three, the RF end receives output signals of the first amplifier (G1), and the output signals of the IF end are input into the second band-pass filter (BPF 2) for filtering and then outputting 5 GHz-15 GHz radio frequency signals;
The second front end processing module is provided with a second input port, a third input port, a first single-pole double-throw switch (S1), a second switch selection branch (SW 2), a second digital control attenuator (AT 2) and a second amplifier (G2), wherein the first single-pole double-throw switch (S1) is used for receiving an analog signal of a altimeter of 4GHz to 8GHz and sequentially carrying out amplitude limiting, attenuation and filtering processing, the third input port is provided with a third amplitude limiter (LM 3) and a fourth band-pass filter (BPF 4) of 0.1 to 18GHz, the third input port is used for receiving a radar excitation signal of 0.1GHz to 18GHz and sequentially carrying out amplitude limiting and filtering processing, the first single-pole double-throw switch (S1) is used for receiving output signals of the third band-pass filter (BPF 3) and the fourth band-pass filter (BPF 4) and alternatively inputting output signals of the second switch selection branch (SW 2), and the second single-pole double-throw switch (BPF 3) is used for receiving output signals of the radio frequency signal of 0.1GHz to 18 GHz;
The frequency conversion processing module comprises a second single-pole double-throw switch (S2), a second mixer (M2), a fifth band-pass filter (BPF 5) of 19.2 GHz-20.2 GHz, a third amplifier (G3), a third mixer (M3), a sixth band-pass filter (BPF 6) of 1.3 GHz-2.3 GHz, a fourth amplifier (G4) and a power divider (PD 1), wherein the power divider (PD 1) outputs two paths of signals, one path of signals is input into a fifth amplifier (G5) and a seventh band-pass filter (BPF 7) of 1.3 GHz-2.3 GHz which are sequentially arranged, the other path of signals is input into a sixth amplifier (G6), an eighth band-pass filter (BPF 8) of 1.3 GHz-2.3 GHz and a detection circuit which are sequentially arranged, the second single-pole double-throw switch (S2) is used for receiving a 5 GHz-15 GHz radio frequency signal output by the first front-end processing module and a 5 GHz-15 GHz radio frequency signal and a second front-end LO signal (F) which is output by the second front-end processing module, and the second signal is input into the second band-pass filter (BPF 8) of 1.3 GHz-2.3 GHz, and the second band-pass filter is input into the second band-pass filter (BPF 8) of 1.3 GHz-2; an LO end of the third mixer (M3) receives a 21.5GHz local oscillator I, an IF end receives an output signal of the third amplifier (G3), and an output signal of an RF end is input into a sixth band-pass filter (BFP 6); the frequency conversion processing module is used for carrying out frequency conversion, filtering amplification and power division processing on the input 5 GHz-15 GHz radio frequency signals or 0.1 GHz-18 GHz radio frequency signals, and outputting intermediate frequency signals of 1.3 GHz-2.3 GHz after the filtering processing of a seventh band-pass filter (BPF 7);
the first switch selection branch (SW 1) and the second switch selection branch (SW 2) have the same structure, and comprise an amplifying branch with 20dB gain and an attenuation branch with 20dB attenuation which are conducted by setting a selection switch;
The radio frequency transceiver module comprises a radio frequency transmitting module, wherein the radio frequency transmitting module is provided with a two-stage mixing module, a first single-pole three-throw switch (SS 1), a first up-conversion branch and a second up-conversion branch;
The two-stage mixing module is used for receiving intermediate frequency modulation signals sent by the intermediate frequency signal processing and control unit and carrying out twice mixing processing to obtain 0.1 GHz-18 GHz radio frequency signals, and the first single-pole three-throw switch (SS 1) is used for dividing the 0.1 GHz-18 GHz radio frequency signals processed by the two-stage mixing module into three paths: one path of the signals is input into a first up-conversion branch circuit after being attenuated by a second fixed attenuator (FA 2) with 30dBm and a third fixed attenuator (FA 3) with 30dBm which are arranged in sequence, one path of the signals is directly input into the first up-conversion branch circuit, and one path of the signals is directly input into the second up-conversion branch circuit;
The two-stage mixing module comprises an equalizer (Eq 1), a fourth numerical control attenuator (AT 4), a seventh amplifier (G7), a ninth band-pass filter (BPF 9) of 1.3 GHz-2.3 GHz, an eighth amplifier (G8), a fourth mixer (M4), a tenth band-pass filter (BPF 10) of 19.2 GHz-20.2 GHz, a ninth amplifier (G9), a fifth mixer (M5) and an eleventh band-pass filter (BPF 11) of 0.1 GHz-18 GHz which are sequentially connected; the LO end of the fourth mixer (M4) receives a first 21.5GHz local oscillator, the IF end receives an output signal of an eighth amplifier (G8), the output signal of the RF end is input into a tenth band-pass filter (BPF 10), the LO end of the fifth mixer (M5) receives a second 20.3 GHz-37.2 GHz local oscillator, the IF end receives an output signal of a ninth amplifier (G9), the output signal of the RF end is input into an eleventh band-pass filter (BPF 11), and the output end of the eleventh band-pass filter (BPF 11) is connected with a first single-pole three-throw switch (SS 1);
The first up-conversion branch circuit comprises a third single-pole double-throw switch (S3), a tenth amplifier (G10), a first coupler (CO 1), a fifth numerical control attenuator (AT 5), a third switch selection branch circuit (SW 3), a fourth switch selection branch circuit (SW 4), a first single-pole single-throw switch (SP 1) and a fourth single-pole double-throw switch (S4) which are sequentially arranged, wherein two input ends of the fourth single-pole double-throw switch (S4) are respectively used as output ends of radio frequency signals of 0.1 GHz-18 GHz and 4 GHz-8 GHz;
The second up-conversion branch circuit comprises a twelfth band-pass filter (BPF 12), an eleventh amplifier (G11), a sixth mixer (M6), a thirteenth band-pass filter (BPF 13) with the frequency ranging from 18GHz to 40GHz, a twelfth amplifier (G12), a second coupler (CO 2), a sixth numerical control attenuator (AT 6), a fifth switch selection branch circuit (SW 5), a sixth switch selection branch circuit (SW 6) and a second single-pole single-throw switch (SP 2) which are sequentially arranged, and the output end of the second single-pole single-throw switch (SP 2) is used as the output end of a radio frequency signal with the frequency ranging from 18GHz to 40 GHz.
2. An integrated radar signal simulator according to claim 1, wherein: the radio frequency transceiver module, the frequency source module, the baseband signal processing module and the antenna module are all arranged in a customized cPCI chassis.
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| CN116087896A (en) * | 2022-12-30 | 2023-05-09 | 北京航天测控技术有限公司 | Function-reconfigurable universal radio frequency microwave simulator |
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