CN104635218B - Millimeter wave radiometer semi-physical simulation system, signal generating method and linearity testing method - Google Patents
Millimeter wave radiometer semi-physical simulation system, signal generating method and linearity testing method Download PDFInfo
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- CN104635218B CN104635218B CN201510082469.9A CN201510082469A CN104635218B CN 104635218 B CN104635218 B CN 104635218B CN 201510082469 A CN201510082469 A CN 201510082469A CN 104635218 B CN104635218 B CN 104635218B
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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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
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Abstract
The invention discloses a millimeter wave radiometer semi-physical simulation system, a signal generating method and a linearity testing method. The system comprises an echo-free isolation box, a target simulator, a millimeter wave radiometer, a control circuit and an upper computer. The signal generating method is used for controlling a voltage control attenuator of a target simulator by generating a certain control voltage, and the target simulator can generate a signal for use in the overall dynamic testing and static performance parameter testing of the millimeter wave radiometer. By adopting the millimeter wave radiometer semi-physical simulation system, a good testing environment is provided for the overall testing and signal simulation of a missile-borne millimeter wave alternating current radiometer, and a method is provided for the included angle measurement of a terminal-sensitive projectile millimeter wave alternating current radiometer. The millimeter wave radiometer semi-physical simulation system has the advantages of low cost, small size, convenience in use, high performance, high electromagnetic shielding performance, low external influence, and the like.
Description
Technical field
The invention belongs to millimetric wave device technical field, particularly a kind of millimeter wave radiometer semi-matter simulating system and letter
Number production method and linearity test method.
Background technology
Nearly ten years, with the maturation of domestic millimetric wave device technology, millimeter wave passive detection device (millimeter wave radiometer)
Research achieve breakthrough, its cost is further reduced, and becomes the sensitive angle especially first-selected detection of Terminal munition
Device.
In Terminal munition, millimeter wave passive detection device is mainly millimeter wave alternative radiometer, needs to be tested before equipment
With demarcation, its test includes field dynamic test and indoor static overall performance parameter testing.Static overall performance test includes
Sensitivity, the time of integration, dynamic range test, echo signal emulation and identification etc..Dynamic test typically carry out big gun penetrate test and
High tower is tested, and it is complete standby detection test of the Terminal munition to realistic objective containing millimeter wave detector that big gun penetrates test, relatively costly；It is high
Millimeter wave radiometer is generally placed on simulation scanning probe mistake of the Terminal munition to target on the high tower turntable of specified altitude for tower test
Journey, typically can only once do the detection test of a height, and Terminal munition actual detection be from high to low differing heights to mesh
Target scanning probe process, thus high tower test can not simulation Terminal munition very well detection overall process.It is a kind of reasonable
Method is to set up semi-hardware type simulation test system.
Many semi-hardware type simulation test systems be there has been in fields such as radar detection, navigation, infrared acquisition and winged controls at present.
《Missile-borne MMW radiometer signal HWIL simulation》Give the semi-hardware type simulation test system of a millimeter wave radiometer, work
Make, under far field condition, with the control signal expression formula of the antenna temperature variable quantity of radiometer detection target, to solve from principle
The equivalent relation between detection and semi-matter simulating system on actual range, but do not provide semi-matter simulating system with mesh
Mark signal voltage control signal form concrete methods of realizing, intuitively with no operability in practical application；《3mm
The emulation test system development of wave band passive detection device》Make and software design side in the hardware of semi-matter simulating system controller
Detailed discussion has been made in face, has also made detailed analysis discussion to echo signal simulation, and has employed electrically controlled attenuator to carry out
The control of target simulator signal, solves the interface and connectivity problem between the hardware of signal control, but does not equally provide target
Concrete signal control form when voltage control signal expression formula during simulation and test, on electrically controlled attenuator control voltage signal with
The equivalent not direct contact of detection test signal on actual range.
The content of the invention
It is an object of the invention to provide a kind of millimeter wave radiometer semi-matter simulating system and signal generating method and line
Property degree method of testing.
The technical solution for realizing the object of the invention is：A kind of millimeter wave radiometer semi-matter simulating system, including mesh
Mark simulator, without echo shielded box, millimeter wave radiometer, control circuit and host computer；
Described is rectangular structure without echo shielded box, and the relative two faces middle of its length direction has first
Opening and the second opening；The target simulator is arranged in the first opening, and target simulator periphery is sealed with the first opening；Institute
State and three frame angle adjustment frames are installed at the second opening, three frame angle adjustment frame peripheries are sealed with the second opening；The millimeter wave
Radiometer is tightly disposed in three frame angle adjustment frames, and the three frames angle adjustment frame is used for adjusting the pitching of millimeter wave radiometer
Angle and azimuth；Without being paved with absorbing material on the inside of echo shielded box；
The target simulator includes noise source, voltage-controlled attenuator and the transmitting antenna being sequentially connected in series, the control circuit
Including microcontroller, digital analog converter and analog-digital converter；
The computer is connected with microcontroller, the digital output port of microcontroller and the numeral of digital analog converter
Input port is connected, and the digital-to-analogue conversion output port of digital analog converter is connected with the control voltage port of voltage-controlled attenuator,
Voltage-controlled attenuator control noise source produce electromagnetic wave, launched by transmitting antenna, tested millimeter wave radiometer with simulation number
The analog input end of word transducer is connected, digital output port and the microcontroller digital input port phase of analog-digital converter
Even, microcontroller is connected with computer, and voltage signal is sent to computer.
A kind of signal of millimeter wave radiometer semi-matter simulating system produces control method, comprises the following steps：
Step 1, host computer emulation detection of millimeter wave radiometer object procedure obtain one group of antenna temperature over time
Data TA(t)；
Step 2, the control voltage by the voltage-controlled attenuator in microwave vector network analyzer test target simulator and
Mapping relations κ between attenuation；
If step 3, target simulator transmitting antenna and being met the far field of dual-antenna system by the reception antenna of pyranometer
Condition is R>2(D+d)2/ λ, control attenuator control voltage V (t) be
V (t)=κ-1[TA(t)(4πR)2/((ENR+1)·T0LTSGtGrλ2)]
If target simulator and Near Field is met by the distance between pyranometer, and be not less than 0.14 times of double antenna system
The far field condition of system apart from when, i.e., 0.28 (D+d)2/λ<R<2(D+d)2/ λ, control attenuator control voltage V (t) be
Wherein, T0It is the ambient temperature represented with unit Kelvin, ENR is the excess noise ratio of noise source；κ be control voltage and
The mapping relations of attenuation；LTSFor the system loss of target simulator；TAFor the antenna temperature that host computer emulation is obtained；R is two
The distance between individual antenna；GtFor transmitting antenna far gain；GrFor reception antenna far gain；λ is the electromagnetic wave of system work
Wavelength；D and d are the bore of target simulator antenna and tested antenna for radiometer respectively；K is wave number；
Step 4, host computer send control voltage V (t) to microcontroller, and microcontroller is by the control voltage data being connected to
Digital analog converter is sent to, digital analog converter output analog voltage controls the attenuation of voltage-controlled attenuator, voltage-controlled to decline
Subtract the millimeter wave noise temperature signal that device control noise source is produced；
Step 5, millimeter wave noise temperature signal are launched by transmitting antenna, simulate field target emanation signal；
Step 6, tested millimeter wave radiometer receive millimeter wave noise temperature signal, tested millimeter wave radiometer output
Voltage signal Jing analog-digital converters, microcontroller are sent to host computer, and host computer shows the waveform voltage signal for receiving.
A kind of linearity test method of millimeter wave radiometer semi-matter simulating system, comprises the following steps：
The first step, host computer send control voltage data, and the control voltage data are N number of impulse waveform；Impulse waveform
Low level be zero, high level meets V (n)=κ-1(κ (0)-n d), n=1,2 ..., N, N are the integer between 10～30；Square
Shape ripple pulsewidth 5ms～10ms, cycle are not less than 20ms, and as n=N, the output of millimeter wave radiometer should be at saturation；
Wherein, κ is the mapping relations between the control voltage and attenuation of the voltage-controlled attenuator in target simulator；D is
The bore of tested antenna for radiometer；
, Jing after half object test system emulation of millimeter wave radiometer, host computer receives electricity for second step, control voltage data
Pressure data；
The maximum point of N number of pulse of voltage data that the 3rd step, taking-up are received, remove saturation voltage point obtain one group it is electric
Pressure sequence；
4th step, the linearity for obtaining contact potential series according to correlation method.
Compared with prior art, its remarkable advantage is the present invention：(1) millimeter wave radiometer HWIL simulation system of the invention
It is good without echo shielded box capability of electromagnetic shielding that system is adopted, by ectocine, emulation and measuring accuracy height；(2) milli of the invention
Metric wave radiometer semi-matter simulating system is provided well for the system test and signal simulation of missile-borne millimeter wave alternative radiometer
Test environment, also provide method for Terminal munition millimeter wave alternative radiometer angle measurement, with low cost, small volume, make
With convenience, high-performance, capability of electromagnetic shielding it is good, by ectocine it is little the advantages of；(3) signal of the invention produces control method letter
It is single feasible, it is easy to accomplish, voltage control signal expression formula quantitatively, definitely can reflect tested millimeter wave radiometer parameter, half
Relation between matter simulating system (containing target simulator) parameter and actual detection distance；(4) millimeter-wave radiation of the invention
The signal of meter semi-matter simulating system produces control method and can carry out various external field environments to the millimeter wave radiometer of different bores
Simulate with the detection event under encounter conditions, can also test the static parameter of millimeter wave radiometer, and accuracy is high；(5) this
Bright linearity test method implementation is simple, easy, and high precision.
Description of the drawings
Fig. 1 is the millimeter wave radiometer semi-matter simulating system structural representation of the present invention.
Fig. 2 is the three frame angle adjustment frame structural representations of the present invention.
Fig. 3 is the sectional view of the absorbing material installation site of the present invention.
Specific embodiment
With reference to Fig. 1, a kind of millimeter wave radiometer HWIL simulation and test system, including target simulator, without echo every
From case 1, millimeter wave radiometer, control circuit and host computer；
Described is rectangular structure without echo shielded box 1, and the relative two faces middle of its length direction has the
One opening and the second opening；The target simulator is arranged in the first opening, and target simulator periphery is sealed with the first opening；
Three frame angle adjustment frames 2, three frame angle adjustment frames, 2 periphery and the second opening sealing are installed at second opening；The milli
Metric wave radiometer is tightly disposed in three frame angle adjustment frames 2, and the three frames angle adjustment frame is used for adjusting millimeter wave radiometer
The angle of pitch and azimuth；The transmitting antenna 3 of the target simulator points to the antenna 4 of millimeter wave radiometer；Isolate without echo
Absorbing material 5 is paved with the inside of case 1；
The target simulator includes noise source, voltage-controlled attenuator and the transmitting antenna being sequentially connected in series, the control circuit
Including microcontroller, digital analog converter and analog-digital converter；
The computer is connected with microcontroller, the digital output port of microcontroller and the numeral of digital analog converter
Input port is connected, and the digital-to-analogue conversion output port of digital analog converter is connected with the control voltage port of voltage-controlled attenuator,
Tested millimeter wave radiometer is connected with the analog input end of analog-digital converter, the digital output port of analog-digital converter
It is connected with microcontroller digital input port, microcontroller is connected with computer, the voltage signal for receiving is sent to into calculating
Machine.
With reference to Fig. 2, the three frames angle adjustment frame includes outside framework 21, central frame 22 and inner frame 23；In inner frame
Between be round mouth 10, the round mouth 10 is used for installing millimeter wave radiometer, the caliber size phase of round mouth size and millimeter wave radiometer
Together；Pitching rotating shaft is set between the outside framework 21 and central frame 22, and central frame 22 and inner frame 23 arrange direction rotating shaft,
Or direction rotating shaft is set between the outside framework and central frame, central frame and inner frame arrange pitching rotating shaft；By bowing
Face upward the angle of pitch and azimuth that rotating shaft and the rotation of direction rotating shaft change millimeter wave radiometer.
Turbine and worm and slide gauge are provided with the three frames angle adjustment frame angle of pitch and azimuth adjustment, are used for
The angle of pitch of millimeter wave alternative radiometer and azimuth in setting circular hole.
With reference to Fig. 3, described without wedge shape absorbing material 51 is paved with the inside of echo shielded box, ripple is inhaled using flat board by corner
Material transition 52.
STM32 chip of the microcontroller using ARMCORTEX-M3 kernels, microcontroller are also associated with touch screen, use
In man-machine interaction.
A kind of signal of half object test system of millimeter wave radiometer produces control method, comprises the following steps：
Step 1, host computer emulation detection of millimeter wave radiometer object procedure obtain one group of antenna temperature over time
Data TA(t)；
Step 2, the control voltage by the voltage-controlled attenuator in microwave vector network analyzer test target simulator and
Mapping relations κ between attenuation；
If step 3, target simulator transmitting antenna and being met the far field of dual-antenna system by the reception antenna of pyranometer
Condition is R>2(D+d)2/ λ, control attenuator control voltage V (t) be
V (t)=κ-1[TA(t)(4πR)2/((ENR+1)·T0LTSGtGrλ2)]
If target simulator and Near Field is met by the distance between pyranometer, and be not less than 0.14 times of double antenna system
The far field condition of system apart from when, i.e., 0.28 (D+d)2/λ<R<2(D+d)2/ λ, control attenuator control voltage V (t) be
Wherein, T0It is the ambient temperature represented with unit Kelvin, ENR is the excess noise ratio of noise source；κ be control voltage and
The mapping relations of attenuation；LTSFor the system loss of target simulator；TAFor the antenna temperature that host computer emulation is obtained；R is two
The distance between individual antenna；GtFor transmitting antenna far gain；GrFor reception antenna far gain；λ is the electromagnetic wave of system work
Wavelength；D and d are the bore of target simulator antenna and tested antenna for radiometer respectively；K is wave number；
Step 4, host computer send control voltage V (t) to microcontroller, and microcontroller is by the control voltage data being connected to
Digital analog converter is sent to, digital analog converter output analog voltage controls the attenuation of voltage-controlled attenuator, voltage-controlled to decline
Subtract the millimeter wave noise temperature signal that device control noise source is produced；
Step 5, millimeter wave noise temperature signal are launched by transmitting antenna, simulate field target emanation signal；
Step 6, tested millimeter wave radiometer receive millimeter wave noise temperature signal, tested millimeter wave radiometer output
Voltage signal Jing analog-digital converters, microcontroller are sent to host computer, and host computer shows the waveform voltage signal for receiving.
A kind of half object test system linearity degree method of testing of millimeter wave radiometer, comprises the following steps：
The first step, host computer send control voltage data, and the control voltage data are N number of impulse waveform；Impulse waveform
Low level be zero, high level meets V (n)=κ-1(κ (0)-n d), n=1,2 ..., N, N are the integer between 10～30；Square
Shape ripple pulsewidth 5ms～10ms, cycle are not less than 20ms, and as n=N, the output of millimeter wave radiometer should be at saturation；
Wherein, κ is the mapping relations between the control voltage and attenuation of the voltage-controlled attenuator in target simulator；D is
The bore of tested antenna for radiometer；
, Jing after half object test system emulation of millimeter wave radiometer, host computer receives electricity for second step, control voltage data
Pressure data；
The maximum point of N number of pulse of voltage data that the 3rd step, taking-up are received, remove saturation voltage point obtain one group it is electric
Pressure sequence；
4th step, the linearity for obtaining contact potential series according to correlation method.
The present invention is described in further detail with reference to specific embodiment.
Embodiment 1
With reference to Fig. 1, millimeter wave radiometer semi-matter simulating system includes target simulator, without echo shielded box 1, millimeter wave
Radiometer, control circuit and host computer；Target simulator includes noise source, voltage-controlled attenuator and the transmitting antenna being sequentially connected in series,
Millimeter wave noise source, voltage-controlled attenuator, transmitting antenna 3 are connected using millimeter wave standard waveguide mouth；The control circuit includes
Microcontroller, digital analog converter and analog-digital converter；
The first opening and the second opening, two mouth center alignments, target are provided with without two faces relative in echo shielded box 1
Simulator is placed in the without echo shielded box 1 first opening, at the same 3 mouthfuls of faces of the transmitting antenna of target simulator point to without echo every
Inside case 1, in the without echo shielded box 1 second opening equipped with three frame angle adjustment frames 2, tested millimeter wave radiometer is placed in three
In frame angle adjustment frame 2, tested antenna for radiometer 4 is also directed to without inside echo shielded box 1；Without echo shielded box except two mouths
Remainder be paved with absorbing material 5, absorbing material 5 is required to millimeter-wave signal decay up to more than -30dB；
It is 1.4m × 0.7m × 0.7m without echo shielded box volume, housing is the cuboid that HLS1 type monolayers steel plate is constituted,
Steel plate thickness is not less than 2mm, and the welding between each face of steel plate housing adopts coiling welded technology, to strengthen shielding propertiess.
Three frame angle adjustment frames 2 include outside framework 21, central frame 22 and inner frame 23；It is round mouth 10 in the middle of inner frame,
The round mouth 10 is used for installing millimeter wave radiometer, and round mouth size is identical with the caliber size of millimeter wave radiometer；The housing
(26,27), central frame 22 and inner frame 23 are provided with two to be provided with two direction rotating shafts between frame 21 and central frame 22
Pitching rotating shaft (24,25), the angle of pitch and the azimuth of millimeter wave radiometer are changed by pitching rotating shaft and the rotation of direction rotating shaft.
Computer is connected with microcontroller by Serial Port Line, the digital output port and digital analog converter of microcontroller
Digital input port be connected, the digital-to-analogue conversion output port of digital analog converter and the control voltage port of voltage-controlled attenuator
Be connected, tested millimeter wave radiometer is connected with the analog input end of analog-digital converter, analog-digital converter it is digital defeated
Exit port is connected with microcontroller digital input port, and microcontroller is connected with computer, and the voltage signal for receiving is sent
To computer；Wherein DAC chip is connected with shielding line using sub-miniature A connector with the control port of voltage-controlled attenuator, DAC chip bit wide
12 should be not less than；ADC chips bit wide should be not less than 10.
STM32 chip of the microcontroller using ARM CORTEX-M3 kernels；Tested millimeter-wave radiation is calculated as millimeter wave exchange
Radiometer, bore are controlled in below 220mm.
In without echo shielded box, between tested millimeter wave radiometer reception antenna 4 and target simulator transmitting antenna 3
Distance meets far field condition, also can only meet the transmitting antenna 3 and 4 double antenna of reception antenna by pyranometer of target simulator
The Near Field of system, but the far field condition of 0.14 times of dual-antenna system should be not less than.
Noise source in target simulator should cover the millimeter wave frequency band of HWIL simulation, and excess noise ratio is not less than 20dB；Pressure
The dynamic range of control attenuator decay is not less than 20dB, and Insertion Loss is less than -3dB, and Attenuation adjustable rate of change is not higher than 10dB/V；Transmitting
3 bandwidth of antenna should cover tested millimeter wave radiometer bandwidth range, and the main beam of transmitting antenna 3 can not be irradiated to side wall.
The signal of the millimeter wave radiometer semi-matter simulating system of the present invention produces control method can be to the milli of different bores
Metric wave radiometer carries out various external field environments and the simulation of the detection event under encounter conditions, can also test the quiet of millimeter wave radiometer
State parameter, and accuracy is high.
Claims (6)
1. a kind of millimeter wave radiometer semi-matter simulating system, it is characterised in that including target simulator, without echo shielded box,
Millimeter wave radiometer, control circuit and host computer；
Described is rectangular structure without echo shielded box, and the relative two faces middle of its length direction has the first opening
With the second opening；The target simulator is arranged in the first opening, and target simulator periphery is sealed with the first opening；Described
Three frame angle adjustment frames, three frame angle adjustment frame peripheries and the second opening sealing are installed at two openings；The millimeter-wave radiation
Meter be tightly disposed in three frame angle adjustment frames, the three frames angle adjustment frame be used for adjust millimeter wave radiometer the angle of pitch and
Azimuth, three frame angle adjustment frames include outside framework, central frame and inner frame；It is round mouth in the middle of inner frame, the round mouth use
In millimeter wave radiometer is installed, round mouth size is identical with the caliber size of millimeter wave radiometer；The outside framework and central frame
Between pitching rotating shaft is set, central frame and inner frame are arranged and are set between direction rotating shaft, or the outside framework and central frame
Direction rotating shaft is put, central frame and inner frame arrange pitching rotating shaft；Millimeter is changed by pitching rotating shaft and the rotation of direction rotating shaft
The angle of pitch of wave radiation meter and azimuth；Without being paved with absorbing material on the inside of echo shielded box；
The target simulator includes noise source, voltage-controlled attenuator and the transmitting antenna being sequentially connected in series, and the control circuit includes
Microcontroller, digital analog converter and analog-digital converter；
The host computer is connected with microcontroller, the digital output port of microcontroller and the numeral input of digital analog converter
Port is connected, and the digital-to-analogue conversion output port of digital analog converter is connected with the control voltage port of voltage-controlled attenuator, voltage-controlled
Attenuator control noise source produces electromagnetic wave, is launched by transmitting antenna, and tested millimeter wave radiometer is turned with simulation numeral
The analog input end of parallel operation is connected, and the digital output port of analog-digital converter is connected with microcontroller digital input port,
Microcontroller is connected with host computer, and voltage signal is sent to host computer.
2. millimeter wave radiometer semi-matter simulating system according to claim 1, it is characterised in that the three frames angle is adjusted
Worm and gear and slide gauge are provided with the whole frame angle of pitch and azimuth adjustment, for setting millimeter wave exchange spoke in circular hole
Penetrate the angle of pitch and the azimuth of meter.
3. millimeter wave radiometer semi-matter simulating system according to claim 1 and 2, it is characterised in that described without echo
Wedge shape absorbing material is paved with the inside of shielded box, and corner adopts Electromagnetic Wave Absorbing Plate transition.
4. millimeter wave radiometer semi-matter simulating system according to claim 1, it is characterised in that the microcontroller is adopted
With the STM32 chips of ARM CORTEX-M3 kernels, microcontroller is also associated with touch screen, for man-machine interaction.
5. a kind of signal of millimeter wave radiometer semi-matter simulating system based on described in claim 1 produces control method, its
It is characterised by, comprises the following steps：
Step 1, host computer emulation detection of millimeter wave radiometer object procedure obtain one group of antenna temperature data T over timeA
(t)；
Step 2, the control voltage by the voltage-controlled attenuator in microwave vector network analyzer test target simulator and decay
Mapping relations κ between amount；
If step 3, target simulator transmitting antenna and being met the far field condition of dual-antenna system by the reception antenna of pyranometer
That is R>2(D+d)2/ λ, control attenuator control voltage V (t) be
V (t)=κ-1[TA(t)(4πR)2/((ENR+1)2T0LTSGtGrλ2)]
If target simulator and Near Field is met by the distance between pyranometer, and be not less than 0.14 times of dual-antenna system
Far field condition apart from when, i.e., 0.28 (D+d)2/λ<R<2(D+d)2/ λ, control attenuator control voltage V (t) be
Wherein, T0It is the ambient temperature represented with unit Kelvin, ENR is the excess noise ratio of noise source；κ is control voltage and decay
The mapping relations of amount；LTSFor the system loss of target simulator；TAFor the antenna temperature that host computer emulation is obtained；R is two days
The distance between line；GtFor transmitting antenna far gain；GrFor reception antenna far gain；λ is the electromagnetic wave ripple of system work
It is long；D and d are the bore of target simulator antenna and tested antenna for radiometer respectively；K is wave number；
Step 4, host computer send control voltage V (t) to microcontroller, and microcontroller is by the control voltage data is activation being connected to
To digital analog converter, digital analog converter output analog voltage, the attenuation of voltage-controlled attenuator, voltage-controlled attenuator is controlled
The millimeter wave noise temperature signal that control noise source is produced；
Step 5, millimeter wave noise temperature signal are launched by transmitting antenna, simulate field target emanation signal；
Step 6, tested millimeter wave radiometer receive millimeter wave noise temperature signal, the voltage of tested millimeter wave radiometer output
Signal Jing analog-digital converters, microcontroller are sent to host computer, and host computer shows the waveform voltage signal for receiving.
6. a kind of linearity test method of the millimeter wave radiometer semi-matter simulating system based on described in claim 1, which is special
Levy and be, comprise the following steps：
The first step, host computer send control voltage data, and the control voltage data are N number of impulse waveform；Impulse waveform it is low
Level is zero, and high level meets V (n)=κ-1(κ (0)-n d), n=1,2 ..., N, N are the integer between 10～30；Square wave
Pulsewidth 5ms～10ms, cycle are not less than 20ms, and as n=N, the output of millimeter wave radiometer should be at saturation；
Wherein, κ is the mapping relations between the control voltage and attenuation of the voltage-controlled attenuator in target simulator, and κ (0) is control
Attenuation when voltage processed is 0；D is the bore of tested antenna for radiometer；
, Jing after half object test system emulation of millimeter wave radiometer, host computer receives voltage number for second step, control voltage data
According to；
The maximum point of N number of pulse of the voltage data that the 3rd step, taking-up are received, removes saturation voltage point and obtains one group of voltage sequence
Row；
4th step, the linearity for obtaining contact potential series according to correlation method.
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| CN108563144B (en) * | 2018-03-30 | 2021-06-29 | 西安电子科技大学 | Missile-borne radar signal processing semi-physical simulation test system |
| CN108917501A (en) * | 2018-05-02 | 2018-11-30 | 南京理工大学 | A kind of electronic fuse semi-hardware type simulation test device |
| CN113296063B (en) * | 2021-04-06 | 2023-09-29 | 北京无线电计量测试研究所 | Device and method for measuring linearity of millimeter wave radiometer |
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| CN102288959A (en) * | 2011-06-20 | 2011-12-21 | 北京理工大学 | Passive imaging system and method for millimeter wave focal plane |
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