CN110806565B - Testing device and method for phased array radar all-link directional diagram - Google Patents
Testing device and method for phased array radar all-link directional diagram Download PDFInfo
- Publication number
- CN110806565B CN110806565B CN201911241533.8A CN201911241533A CN110806565B CN 110806565 B CN110806565 B CN 110806565B CN 201911241533 A CN201911241533 A CN 201911241533A CN 110806565 B CN110806565 B CN 110806565B
- Authority
- CN
- China
- Prior art keywords
- circuit
- radar
- testing
- test
- near field
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 168
- 238000010586 diagram Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 33
- 230000010355 oscillation Effects 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims description 32
- 238000001914 filtration Methods 0.000 claims description 11
- 239000000523 sample Substances 0.000 claims description 6
- 230000010363 phase shift Effects 0.000 claims description 5
- 238000005070 sampling Methods 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims description 3
- 230000002829 reductive effect Effects 0.000 abstract description 10
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000010897 surface acoustic wave method Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/10—Radiation diagrams of antennas
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Electromagnetism (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention discloses a testing device and a testing method for an all-link directional diagram of a phased array radar, and relates to the technical field of radar testing. The testing device comprises a near field testing system, a PC and auxiliary testing equipment, wherein the auxiliary testing equipment comprises a phase shifting circuit, a combiner, an up-converter and a passive down-converter; when the transmission pattern test is carried out, the passive down converter is utilized to convert the radio frequency reference signal into an intermediate frequency signal, so that the test of the full transmission radio frequency link flow is realized; when the receiving direction diagram test is carried out, the phase shifting function of the phase shifting circuit is utilized to test all beam directions, and the up-converter and the local oscillation circuit of the radar to be tested can offset errors caused by frequency conversion, so that the test accuracy is improved; under the condition that the near field test system does not have a frequency conversion function, the device can test the whole radio frequency link flow, so that the test parameters are more complete, the complexity of a test link is reduced, and the cost of test equipment is reduced.
Description
Technical Field
The invention belongs to the technical field of radar testing, and particularly relates to a device and a method for testing an all-link directional diagram of a phased array radar.
Background
The antenna pattern characterizes the distribution of the antenna radiation energy in space and reflects the performance index and the working state of the antenna. Important antenna parameters such as the direction coefficient, the gain, the half-power beam width, the side lobe level and the like of the antenna can be determined by measuring the antenna pattern. The radiation characteristics of the antenna are analyzed, analysis data can be provided for debugging, installation, maintenance and overhaul of the antenna in the use process, whether the performance index of the antenna meets the requirements or not is judged, and whether the antenna has faults or not is judged.
The current method and device for testing the phased array radar directional diagram in the industry mainly comprises the following three steps:
the first is to perform a separate pattern test only for the passive part of the antenna, which is not a full link test, but only to obtain the performance of the antenna, and only to test the normal beam.
The second method is to test the antenna and the TR component together in a pattern, and the main defects of the method are that: a. the performance of the antenna plus TR radio frequency end can only be reflected instead of the full link test, and for the scheme that each channel comprises a variable frequency link, the variable frequency and intermediate frequency circuits cannot be detected, and the full link performance cannot be reflected; b. during the test of the receiving directional diagram, for a common phased array radar, the TR module has a phase shift function, so that the directional diagram of each wave beam can be tested, and for a receiving link adopting a Digital Beam Forming (DBF) technology, the TR module does not need the phase shift function, so that the normal directional diagram can be tested.
The third is to take the whole phased array radar as an integral tested piece to test the directional diagram, the test method is a full-link test, the method has the main defects of complex requirements on site conditions, needs to have far-field test conditions, has large requirements on the phased array radar test site with lower frequency band, and is easy to influence the test result by environment.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a device and a method for testing the full-link directional diagram of the phased array radar, which can realize the testing of the full-radio frequency link flow when a near-field test system does not have a frequency conversion function, can realize the testing of all beam directional diagrams when receiving the directional diagram test, and reduce the complexity of the testing.
The invention solves the technical problems by the following technical scheme: a phased array radar full link pattern testing apparatus, comprising: near field test system and the PC that are connected with the radar that is surveyed respectively, characterized by still includes: auxiliary test equipment respectively connected with the tested radar, the near field test system and the PC;
the auxiliary test equipment comprises a multipath phase shifting circuit, a combiner, an up-converter and a passive down-converter; the input ends of the multipath phase shifting circuits are respectively connected with multipath intermediate frequency circuits of the radar to be tested, and the output ends of the multipath phase shifting circuits are connected with the input ends of the combiner; the output end of the combiner is connected with the input end of the up-converter, and the output end of the up-converter is connected with the near-field test system; the output end of the passive down-converter is connected with a frequency conversion circuit of the radar to be tested, and the input end of the passive down-converter is connected with the near-field test system; the input end of the up-converter and the input end of the passive down-converter are also respectively connected with a local oscillation circuit of the radar to be tested.
When the test device of the invention is used for testing the transmitting directional diagram, the passive down converter is used for converting the radio frequency reference signal into the intermediate frequency signal, so that the test of the flow of the full transmitting radio frequency link is realized; the independent passive down converter is adopted, so that a frequency conversion function is not required to be added in the near field test system, the complexity of a test link is reduced, the requirement on the near field test system is lowered, and the cost of test equipment is reduced; when the receiving direction diagram test is carried out, the phase shifting function of the phase shifting circuit is utilized to test all beam directions, and the up-converter and the local oscillation circuit of the radar to be tested can offset errors caused by frequency conversion, so that the test accuracy is improved; under the condition that the near field test system does not have a frequency conversion function, the test device can test the whole radio frequency link flow, so that the test parameters are more complete, the complexity of a test link is reduced, and the cost of test equipment is reduced; the testing device acquires far-field transmitting and receiving patterns by using the near-field testing system, does not need to have far-field testing conditions, and reduces the requirements on site conditions.
Further, one path of the phase shifting circuit comprises a first-stage switching circuit, a first-stage attenuation circuit, a first-stage amplifying circuit, a transformer circuit, a second-stage switching circuit, an analog phase shifting circuit, a second-stage attenuation circuit, a second-stage amplifying circuit and a filter circuit which are connected in sequence; one input end of the primary switch circuit is connected with one intermediate frequency circuit of the tested radar, and the output end of the filter circuit is connected with the input end of the combiner.
Further, the primary attenuation circuit and the secondary attenuation circuit are mainly circuits of an attenuator with the model of RFSA 3714.
Further, the analog phase-shifting circuit comprises a phase shifter U11 with the model of JSPS-51, a 1 st pin of the phase shifter U11 is connected with the output end of the secondary switching circuit through a capacitor C30, and a 7 th pin of the phase shifter U11 is connected with the input end of the secondary attenuation circuit through a series circuit formed by a capacitor C31, a resistor R16 and a capacitor C29.
Further, the passive down converter comprises a primary mixing circuit, a primary filtering circuit, a secondary mixing circuit and a tertiary filtering circuit which are connected in sequence; the LO end of the primary mixing circuit and the LO end of the secondary mixing circuit are respectively connected with a local oscillation circuit of the radar to be tested, and the RF end of the primary mixing circuit is connected with the output end of the near field test system; and the output end of the three-stage filter circuit is connected with a frequency conversion circuit of the radar to be tested.
The two-stage frequency mixing circuit is used for converting the radio frequency reference signal into the intermediate frequency signal and feeding the intermediate frequency signal to the radar to be tested, and the three-stage filter is used for effectively filtering out harmonic waves and spurious generated during frequency conversion, so that the influence of the harmonic waves and spurious on the radar to be tested in the test process is avoided.
Further, the primary mixing circuit comprises a mixer U39 with the model of MAC-113H, a 10 th pin of the mixer U39 is connected with a local oscillation circuit of the radar to be tested through a capacitor C186, a 5 th pin of the mixer U39 is connected with an output end of the near field test system through a capacitor C190, and a3 rd pin of the mixer U39 is connected with an input end or an output end of the primary filtering circuit through a capacitor C151.
Further, the primary filter circuit and the secondary filter circuit are filter circuits mainly comprising surface acoustic wave filters.
Further, the two-stage mixer circuit adopts a mixer with the model of MBA-15L.
Further, the three-stage filtering circuit comprises a filter U100 with the model of BPF-A60, the 1 st pin or the 12 th pin of the filter U100 is connected with the IF end of the two-stage mixing circuit, and the 12 th pin or the 1 st pin of the filter U100 is connected with the frequency conversion circuit of the tested radar through a series circuit consisting of a capacitor C165, a resistor R185 and a capacitor C164.
Correspondingly, the testing method of the full-link directional diagram of the phased array radar comprises the following steps:
step 1: initializing and setting the center frequency and the sampling frequency of the near field test system;
step 2: the tested radar is in a transmitting test mode, a passive down converter acquires a radio frequency reference signal sent by a near field test system, and the radio frequency reference signal is converted into an intermediate frequency signal and fed to the tested radar;
step 3: the tested radar converts the received intermediate frequency signal into a radio frequency signal, feeds the radio frequency signal to each path of TR assembly through a power divider, and radiates out through an antenna array surface;
step 4: a probe of the near field test system receives a signal radiated by the antenna array surface, compares the signal with an output radio frequency reference signal to obtain near field amplitude and phase data, and acquires a transmitting direction diagram after the whole antenna array surface is scanned;
step 5: the tested radar is in a receiving test mode, and the near field test system radiates an emergent frequency reference signal through the probe to feed the antenna array surface of the tested radar;
step 6: the tested radar converts the radio frequency reference signal in the step 5 into an intermediate frequency signal, and feeds the intermediate frequency signal to a phase shifting circuit;
step 7: the intermediate frequency signal is phase-shifted and then synthesized into a signal by a combiner;
step 8: the signal of the step 7 is converted into a radio frequency signal by an up-converter and then fed to a near field test system;
step 9: and (5) comparing the radio frequency signal in the step (8) with the reference radio frequency signal output in the step (5) by the near field test system to obtain near field amplitude and phase data, and acquiring a receiving pattern after the whole antenna array surface scanning is completed.
The testing method of the full-link directional diagram of the phased array radar has the same beneficial effects as the testing device.
Advantageous effects
Compared with the prior art, the testing device for the full-link directional diagram of the phased array radar provided by the invention has the advantages that when the transmission directional diagram is tested, the passive down converter is utilized to convert the radio frequency reference signal into the intermediate frequency signal, so that the testing of the full-transmission radio frequency link flow is realized; the independent passive down converter is adopted, so that a frequency conversion function is not required to be added in the near field test system, the complexity of a test link is reduced, the requirement on the near field test system is lowered, and the cost of test equipment is reduced; when the receiving direction diagram test is carried out, the phase shifting function of the phase shifting circuit is utilized to test all beam directions, and the up-converter and the local oscillation circuit of the radar to be tested can offset errors caused by frequency conversion, so that the test accuracy is improved; under the condition that the near field test system does not have a frequency conversion function, the test device can test the whole radio frequency link flow, so that the test parameters are more complete, the complexity of a test link is reduced, and the cost of test equipment is reduced; the testing device acquires far-field transmitting and receiving patterns by using the near-field testing system, does not need to have far-field testing conditions, and reduces the requirements on site conditions.
The testing device can perform full-link testing of the transmitting directional diagram and full-link testing of the receiving directional diagram, and the passive down-converter does not need an external power supply, so that the testing device is simple in circuit structure and convenient and quick to test.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawing in the description below is only one embodiment of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of a test apparatus in an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a phase shifting circuit according to an embodiment of the present invention, where fig. 2 (a) is a schematic circuit diagram mainly including a switch U6, fig. 2 (b) is a schematic circuit diagram mainly including an attenuator U7 and an amplifier U8, fig. 2 (c) is a schematic circuit diagram mainly including a transformer U9 and a switch U10, fig. 2 (d) is a schematic circuit diagram mainly including a phase shifter U11, fig. 2 (e) is a schematic circuit diagram mainly including an attenuator U12 and an amplifier U14, and fig. 2 (f) is a schematic circuit diagram mainly including a filter U13; the capacitor C16 in fig. 2 (a) is connected to the 5 th pin of U7 in fig. 2 (b), the resistor R5 in fig. 2 (b) is connected to the capacitor C19 in fig. 2 (C), the 3 rd pin of U10 in fig. 2 (C) is connected to the capacitor C30 in fig. 2 (d), the capacitor C29 in fig. 2 (d) is connected to the 5 th pin of U12 in fig. 2 (e), and the 3 rd pin of U14 in fig. 2 (e) is connected to the capacitor C33 in fig. 2 (f);
FIG. 3 is a block diagram of a passive down converter in an embodiment of the invention;
fig. 4 is a schematic circuit diagram of a passive down converter according to an embodiment of the present invention, where fig. 4 (a) is a schematic circuit diagram mainly including a filter U100, fig. 4 (b) is a schematic circuit diagram mainly including a mixer U1, fig. 4 (c) is a schematic circuit diagram mainly including a surface acoustic wave filter RF2, fig. 4 (d) is a schematic circuit diagram mainly including a surface acoustic wave filter RF1, and fig. 4 (e) is a schematic circuit diagram mainly including a mixer U39; the 12 th pin of U100 in fig. 4 (a) is connected to the 3 rd pin of U1 in fig. 4 (b), the 5 th pin of U1 in fig. 4 (b) is connected to the capacitor C1 in fig. 4 (C), the capacitor C2 in fig. 4 (C) is connected to the 2 nd pin of RF1 in fig. 4 (d), and the resistor R2 in fig. 4 (d) is connected to the capacitor C151 in fig. 4 (e).
Detailed Description
The following description of the embodiments of the present invention will be made more apparent and fully by reference to the accompanying drawings, in which it is shown, however, only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in FIG. 1, the testing device of the full-link directional diagram of the phased array radar provided by the invention comprises a near field testing system, a PC and auxiliary testing equipment, wherein the auxiliary testing equipment comprises a multipath phase shifting circuit, a combiner, an up-converter and a passive down-converter; the input ends of the multipath phase shifting circuits are respectively connected with multipath intermediate frequency circuits of the radar to be tested, and the output ends of the multipath phase shifting circuits are connected with the input ends of the combiner; the output end of the combiner is connected with the input end of the up-converter, and the output end of the up-converter is connected with the near-field test system; the output end of the passive down-converter is connected with a frequency conversion circuit of the radar to be tested, and the input end of the passive down-converter is connected with the near-field test system; the input end of the up-converter and the input end of the passive down-converter are also connected with a local oscillation circuit of the radar to be tested.
As shown in fig. 2, the one-path phase-shifting circuit includes a first-stage switch circuit U6, a first-stage attenuation circuit U7, a first-stage amplification circuit U8, a transformer circuit U9, a second-stage switch circuit U10, an analog phase-shifting circuit U11, a second-stage attenuation circuit U12, a second-stage amplification circuit U14, and a filter circuit U13, which are sequentially connected; one input end (RF 1 end) of the primary switch circuit U6 is connected with one path of intermediate frequency circuit of the radar to be tested, and the output end of the filter circuit U13 is connected with the input end of the combiner; the other input terminal (RF 2 terminal) of the primary switch circuit U6 is connected to the corresponding circuit when other functions are to be implemented, and is not connected when other functions are not to be implemented. In this embodiment, no other functions are required, and therefore, the RF2 terminal of the primary switch circuit U6 is not required to be connected to other circuits. In this embodiment, the primary switch circuit U6 and the secondary switch circuit U10 are mainly circuits of single-pole double-throw switches with the model of HMC349AMS8GE, and the single-pole double-throw switches with the model of HMC349AMS8GE have the advantages of high isolation, low insertion loss, high input linearity, high power processing, and the like.
As shown in fig. 2, the primary attenuation circuit U7 and the secondary attenuation circuit U12 are mainly attenuators with the model of RFSA3714, and determine how much the attenuator is specifically attenuated according to which angle the beam is directed; the 7-bit digital step attenuator model RFSA3714 has high linearity over the entire 31.75dB gain control range, a step size of 0.25dB, and a low insertion loss of 1.5dB at 2 GHz.
As shown in fig. 2, the analog phase-shifting circuit includes a phase shifter U11 with a model JSPHS-51, a 1 st pin of the phase shifter U11 is connected with an output end of the secondary switching circuit through a capacitor C30, and a 7 th pin of the phase shifter U11 is connected with an input end of the secondary attenuation circuit through a series circuit composed of a capacitor C31, a resistor R16 and a capacitor C29. The model JSPS-51 analog phase shifter has low insertion loss, excellent voltage standing wave ratio, excellent weldability and strain relief capability.
The phase shifting circuit is controlled by a PC to perform signal phase shifting on each channel of a tested radar main body, so that all the directional patterns of the required beams can be tested, if the phased array radar is a phased array radar which does not have a receiving phase shifting function on a radio frequency link, the normal beam can be tested only, for example, an X-band phased array radar (only 0 DEG beam can be tested on the premise of not using the phase shifting function), and the + -45 DEG beam (the designed beam area of the radar) can be tested by using the phase shifting function of the phase shifting circuit. The function of the combiner is to combine the data of multiple channels into one path. The function of the up-converter is to utilize the local oscillator signal transmitted by the radar main body to be tested to finish the frequency conversion function from the intermediate frequency to the radio frequency, and finally transmit the radio frequency signal to the near field test system for testing, the up-converter reduces the complexity of testing, simultaneously reduces the requirement on the near field test system, and the local oscillator circuit of the radar main body to be tested provides the local oscillator signal consistent with the radar main body frequency conversion circuit for the up-converter, so that the test result is more accurate and reliable.
As shown in fig. 3, the passive down converter mainly comprises a passive down conversion circuit and a filter circuit, the passive down conversion circuit has the main functions of converting radio frequency signals sent by a near field test system into intermediate frequency and then feeding the intermediate frequency to a radar to be tested, and the filter circuit has the main functions of inhibiting harmonic waves and spurious emissions generated by frequency conversion and avoiding the influence of the signals on the radar to be tested in the test process. The passive down converter is connected with a local oscillation circuit of the radar to be tested, and errors caused by frequency conversion are counteracted by the local oscillation circuit, so that the test result is more accurate and reliable; the passive down converter can not adopt external power supply, and the circuit structure is simple, and the test is convenient and fast.
As shown in fig. 4, the passive down-converter includes a primary mixing circuit, a primary filtering circuit, a secondary mixing circuit and a tertiary filtering circuit which are sequentially connected; the LO end (10 th pin) of the primary mixing circuit and the LO end (10 th pin) of the secondary mixing circuit are respectively connected with a local oscillation circuit of a radar to be tested, and the RF end (3 rd pin) of the primary mixing circuit is connected with the output end of the near field test system; the output end (1 st or 12 th) of the three-stage filter circuit is connected with a frequency conversion circuit of the tested radar.
In this embodiment, the primary mixing circuit includes a high mixer U39 with a model of MAC-113H, a 10 th pin of the mixer U39 is connected to a local oscillation circuit of the radar to be tested through a capacitor C186, a 5 th pin of the mixer U39 is connected to an output end of the near field test system through a capacitor C190, and a3 rd pin of the mixer U39 is connected to an output end (6 th pin) of the primary filtering circuit through a capacitor C151; the secondary frequency mixing circuit adopts a low frequency mixer with the model of MBA-15L; the primary filter circuit RF1 and the secondary filter circuit RF2 are filter circuits mainly comprising surface acoustic wave filters, the model of the surface acoustic wave filters is SF1362M38MA so as to filter high intermediate frequency 1362M, and the input end and the output end of the filter chip are reversible; the three-stage filter circuit comprises a filter U100 with the model of BPF-A60, the 12 th pin of the filter U100 is connected with the IF end (3 rd pin) of the two-stage mixer circuit, the 1 st pin of the filter U100 is connected with the frequency conversion circuit of the tested radar through a series circuit consisting of a capacitor C165, a resistor R185 and a capacitor C164, the filter U100 is a passive filter, spurious signals except intermediate frequency signals are filtered, and then the spurious signals are fed to the frequency conversion circuit of the tested radar, and the input end and the output end of the filter U100 are reciprocal.
The auxiliary test equipment is utilized to test the full radio frequency link flow (the full transmitting radio frequency link and the full receiving radio frequency link), and generally, when a near field test system without a frequency conversion function is utilized to test the antenna, only the antenna is tested alone, or the TR component and the antenna are tested, the frequency conversion function is increased, the cost of the frequency conversion function in the near field test system is relatively high, and the link is complex.
The near field test system is connected with a control circuit of the radar to be tested through a radio frequency interface (high-precision clock) and an LVTTL level interface (pulse synchronous signal). The near field test system mainly has the function of acquiring near field good fortune phase data of a tested radar by utilizing a near field scanning frame by applying a near field test principle and calculating a far field pattern, and is generally divided into a near field test system with a frequency conversion function and a near field test system without the frequency conversion function, wherein the near field test system with the frequency conversion function has complicated links and expensive equipment. In this embodiment, the near field test system does not have a frequency conversion function, and is in the prior art, and can be customized by a manufacturer according to test requirements, for example, a microwave darkroom is a near field test system, a receiving and analyzing part of a test site is mainly composed of an N5227A type PNA high performance vector network analyzer and is assisted by a high performance radio frequency amplifier N4985A unit, the whole test is a self-forming system, common test instruments of different test frequency bands and different test methods can be used, and the measurement of various antennas and parameters of antennas of different frequency bands can be completed by replacing reference/test frequency mixing components of different frequency bands and corresponding connecting cables and adapters.
Correspondingly, the testing method of the full-link directional diagram of the phased array radar comprises the following steps:
step 1: initializing and setting the center frequency and the sampling frequency of the near field test system;
step 2: the PC controls the tested radar to be in a transmitting test mode, the tested radar generates a corresponding time sequence control signal in the transmitting test mode, the passive down converter acquires a radio frequency reference signal sent by the near field test system, and the radio frequency reference signal is converted into an intermediate frequency signal and is used as an excitation signal to be fed to the tested radar;
step 3: the tested radar converts the received intermediate frequency signal into a radio frequency signal, feeds the radio frequency signal to each path of TR assembly through a power divider, and radiates out through an antenna array surface;
step 4: the probe of the near field test system receives signals radiated by the antenna array surface, compares the signals with the output radio frequency reference signals to obtain near field amplitude-phase data, and acquires a far field pattern after the whole antenna array surface is scanned, namely acquires a transmitting pattern;
step 5: the PC controls the radar to be tested to be in a receiving test mode, the radar to be tested generates corresponding time sequence control signals in the receiving test mode, and the near field test system radiates the emergent frequency reference signals through the probe to feed the emergent frequency reference signals to the antenna array surface of the radar to be tested;
step 6: the tested radar converts the radio frequency reference signal in the step 5 into an intermediate frequency signal through each path of TR components and a frequency conversion circuit, and feeds the intermediate frequency signal to a phase shift circuit;
step 7: the intermediate frequency signal is phase-shifted (the wave beam is controlled by the PC to point to a certain wave bit to be tested) and then is synthesized into a signal by the combiner;
step 8: the signal of the step 7 is converted into a radio frequency signal by an up-converter and then fed to a near field test system;
step 9: and (5) comparing the radio frequency signal in the step (8) with the reference radio frequency signal output in the step (5) by the near field test system to obtain near field amplitude-phase data, and acquiring a far field pattern after the whole antenna array surface is scanned, namely acquiring a receiving pattern.
The foregoing disclosure is merely illustrative of specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art will readily recognize that changes and modifications are possible within the scope of the present invention.
Claims (9)
1. The method for testing the full-link directional diagram of the phased array radar is characterized by comprising the following steps of:
step 1: initializing and setting the center frequency and the sampling frequency of the near field test system;
step 2: the tested radar is in a transmitting test mode, a passive down converter acquires a radio frequency reference signal sent by a near field test system, and the radio frequency reference signal is converted into an intermediate frequency signal and fed to the tested radar;
step 3: the tested radar converts the received intermediate frequency signal into a radio frequency signal, feeds the radio frequency signal to each path of TR assembly through a power divider, and radiates out through an antenna array surface;
step 4: a probe of the near field test system receives a signal radiated by the antenna array surface, compares the signal with an output radio frequency reference signal to obtain near field amplitude and phase data, and acquires a transmitting direction diagram after the whole antenna array surface is scanned;
step 5: the tested radar is in a receiving test mode, and the near field test system radiates an emergent frequency reference signal through the probe to feed the antenna array surface of the tested radar;
step 6: the tested radar converts the radio frequency reference signal in the step 5 into an intermediate frequency signal, and feeds the intermediate frequency signal to a phase shifting circuit;
step 7: the intermediate frequency signal is phase-shifted and then synthesized into a signal by a combiner;
step 8: the signal of the step 7 is converted into a radio frequency signal by an up-converter and then fed to a near field test system;
step 9: and (5) comparing the radio frequency signal in the step (8) with the reference radio frequency signal output in the step (5) by the near field test system to obtain near field amplitude and phase data, and acquiring a receiving pattern after the whole antenna array surface scanning is completed.
2. The method of claim 1, wherein one of the phase shift circuits comprises a primary switch circuit, a primary attenuator circuit, a primary amplifier circuit, a transformer circuit, a secondary switch circuit, an analog phase shift circuit, a secondary attenuator circuit, a secondary amplifier circuit, and a filter circuit, which are sequentially connected; one input end of the primary switch circuit is connected with one intermediate frequency circuit of the tested radar, and the output end of the filter circuit is connected with the input end of the combiner.
3. The method for testing the link pattern of the phased array Lei Daquan of claim 2, wherein the primary attenuation circuit and the secondary attenuation circuit are attenuators with the model number RFSA 3714.
4. The method for testing the link pattern of the phased array Lei Daquan as claimed in claim 2, wherein the analog phase shifting circuit comprises a phase shifter U11 of the type JSPHS-51, the 1 st pin of the phase shifter U11 is connected to the output terminal of the secondary switching circuit through a capacitor C30, and the 7 th pin of the phase shifter U11 is connected to the input terminal of the secondary attenuation circuit through a series circuit consisting of a capacitor C31, a resistor R16 and a capacitor C29.
5. The method for testing a phased array Lei Daquan link pattern according to any one of claims 1-4, wherein the passive down-converter comprises a primary mixing circuit, a primary filtering circuit, a secondary mixing circuit and a tertiary filtering circuit connected in sequence; the LO end of the primary mixing circuit and the LO end of the secondary mixing circuit are respectively connected with a local oscillation circuit of the radar to be tested, and the RF end of the primary mixing circuit is connected with the output end of the near field test system; and the output end of the three-stage filter circuit is connected with a frequency conversion circuit of the radar to be tested.
6. The method for testing the phased array Lei Daquan link pattern of claim 5, wherein the primary mixing circuit comprises a mixer U39 with a model number of MAC-113H, a 10 th pin of the mixer U39 is connected to a local oscillator circuit of the radar under test through a capacitor C186, a 5 th pin of the mixer U39 is connected to an output terminal of the near field testing system through a capacitor C190, and a3 rd pin of the mixer U39 is connected to an input terminal or an output terminal of the primary filtering circuit through a capacitor C151.
7. The method for testing the phased array Lei Daquan link pattern of claim 5, wherein the primary filter circuit and the secondary filter circuit each employ a saw filter of type SF1362M38 MA.
8. The method of testing a phased array Lei Daquan link pattern of claim 5, wherein the secondary mixer circuit employs a mixer model MBA-15L.
9. The method for testing the link pattern of the phased array Lei Daquan as claimed in claim 5, wherein the three-stage filter circuit comprises a filter U100 with the model of BPF-A60, the 1 st pin or the 12 th pin of the filter U100 is connected with the IF end of the secondary mixing circuit, and the 12 th pin or the 1 st pin of the filter U100 is connected with the frequency conversion circuit of the tested radar through a series circuit consisting of a capacitor C165, a resistor R185 and a capacitor C164.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911241533.8A CN110806565B (en) | 2019-12-06 | 2019-12-06 | Testing device and method for phased array radar all-link directional diagram |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911241533.8A CN110806565B (en) | 2019-12-06 | 2019-12-06 | Testing device and method for phased array radar all-link directional diagram |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110806565A CN110806565A (en) | 2020-02-18 |
| CN110806565B true CN110806565B (en) | 2024-04-16 |
Family
ID=69492638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911241533.8A Active CN110806565B (en) | 2019-12-06 | 2019-12-06 | Testing device and method for phased array radar all-link directional diagram |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110806565B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111679253A (en) * | 2020-04-30 | 2020-09-18 | 惠州市德赛西威汽车电子股份有限公司 | Millimeter wave radar test system and method thereof |
| CN112859021B (en) * | 2021-01-22 | 2024-02-13 | 浙江宜通华盛科技有限公司 | Method and system for testing full-link dynamic range and sensitivity of phased array radar |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106443599A (en) * | 2016-08-25 | 2017-02-22 | 零八电子集团有限公司 | Method for testing amplitude and phase of TR module based on matrix gating |
| CN106841828A (en) * | 2017-02-23 | 2017-06-13 | 上海霍莱沃电子系统技术股份有限公司 | A kind of near field antenna test system and its method of testing based on frequency division |
| CN108155958A (en) * | 2017-11-22 | 2018-06-12 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Extensive mimo antenna array far field calibration system |
| CN108254722A (en) * | 2017-12-25 | 2018-07-06 | 珠海纳睿达科技有限公司 | A kind of double frequency phased array radar system and its implementation |
| CN109116317A (en) * | 2018-09-10 | 2019-01-01 | 西安电子工程研究所 | A kind of test method of wide band net directional diagram |
| CN209642677U (en) * | 2019-10-12 | 2019-11-15 | 成都华兴汇明科技有限公司 | Radio frequency baseband integrated terminal Auto-Test System |
| CN211627811U (en) * | 2019-12-06 | 2020-10-02 | 湖南宜通华盛科技有限公司 | Test device for phased array radar full link directional diagram |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6700531B2 (en) * | 2002-07-17 | 2004-03-02 | Anritsu Company | Integrated multiple-up/down conversion radar test system |
-
2019
- 2019-12-06 CN CN201911241533.8A patent/CN110806565B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106443599A (en) * | 2016-08-25 | 2017-02-22 | 零八电子集团有限公司 | Method for testing amplitude and phase of TR module based on matrix gating |
| CN106841828A (en) * | 2017-02-23 | 2017-06-13 | 上海霍莱沃电子系统技术股份有限公司 | A kind of near field antenna test system and its method of testing based on frequency division |
| CN108155958A (en) * | 2017-11-22 | 2018-06-12 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Extensive mimo antenna array far field calibration system |
| CN108254722A (en) * | 2017-12-25 | 2018-07-06 | 珠海纳睿达科技有限公司 | A kind of double frequency phased array radar system and its implementation |
| CN109116317A (en) * | 2018-09-10 | 2019-01-01 | 西安电子工程研究所 | A kind of test method of wide band net directional diagram |
| CN209642677U (en) * | 2019-10-12 | 2019-11-15 | 成都华兴汇明科技有限公司 | Radio frequency baseband integrated terminal Auto-Test System |
| CN211627811U (en) * | 2019-12-06 | 2020-10-02 | 湖南宜通华盛科技有限公司 | Test device for phased array radar full link directional diagram |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110806565A (en) | 2020-02-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103547933B (en) | For the system that positions the fault in cable system and equipment | |
| CN103119845B (en) | Method and apparatus for the fault in positioning and communicating network | |
| CN108768553B (en) | Universal full-automatic array transceiver module amplitude-phase test system and test method thereof | |
| US6178310B1 (en) | Transmitting and receiving antenna voltage standing wave ratios measuring circuit of base station in mobile communication system | |
| CN110596661B (en) | Phased array radar with self-checking circuit and self-checking method thereof | |
| CN114185008A (en) | System and method for compensating amplitude-phase error of receiving channel of narrow-band digital array radar system | |
| CN110806565B (en) | Testing device and method for phased array radar all-link directional diagram | |
| CN112255605B (en) | Multichannel receiver gain compensation system for amplitude comparison height measurement radar | |
| CN113138371B (en) | Broadband near field measurement system and method for amplitude phase rapid calibration of radio frequency link | |
| CN112485764B (en) | Retro-reflector with echo enhancement and phase shift modulation functions | |
| CN211627811U (en) | Test device for phased array radar full link directional diagram | |
| CN106842158A (en) | A kind of phased-array radar transmission channel phase alignment method of testing | |
| CN114720952B (en) | Multi-frequency-band weather radar full-link remote calibration system | |
| CN211627810U (en) | Test device for receiving directional diagram of phased array radar full link | |
| CN113820670A (en) | On-orbit internal calibration method for satellite-borne phased array meteorological radar | |
| CN112014651A (en) | Testing method and testing system of frequency conversion multi-channel phased array antenna | |
| CN111596266A (en) | Radio frequency front end of low-cost detection unmanned aerial vehicle C wave band radar | |
| CN113014294B (en) | Two-dimensional phased array microwave front end calibration network and method | |
| CN109343014B (en) | Apparatus and method for testing T/R component of phased array radar | |
| CN114675245A (en) | Design device and method of transceiving calibration component | |
| CN114063026A (en) | Static detection device and method for phased array radar system | |
| US11367953B2 (en) | Antenna device and calibration method | |
| CN116559755A (en) | Array antenna active standing wave test calibration system and method | |
| CN104901753B (en) | The amplitude-phase ratio method of testing and device of the homologous radiofrequency signal of two-way | |
| CN211627809U (en) | Test device for phased array radar full link transmitting directional diagram |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Country or region after: China Address after: 312035 Floor 1, Workshop 2, No. 1417, Renmin East Road, Fubu Street, Yuecheng District, Shaoxing City, Zhejiang Province Applicant after: Zhejiang Yitong Huasheng Technology Co.,Ltd. Address before: 3 / F, building 5, Xinggong Science Park, 100 Luyun Road, Changsha hi tech Development Zone, Hunan 410000 Applicant before: HUNAN EASTONE WASHON TECHNOLOGY Co.,Ltd. Country or region before: China |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |