CN110515042A - Dual polarization radar antenna receives system - Google Patents
Dual polarization radar antenna receives system Download PDFInfo
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- CN110515042A CN110515042A CN201910808128.3A CN201910808128A CN110515042A CN 110515042 A CN110515042 A CN 110515042A CN 201910808128 A CN201910808128 A CN 201910808128A CN 110515042 A CN110515042 A CN 110515042A
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- 230000010287 polarization Effects 0.000 title claims abstract description 20
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- 230000003287 optical effect Effects 0.000 claims description 14
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Classifications
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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
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/28—Details of pulse systems
- G01S7/285—Receivers
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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
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/36—Means for anti-jamming, e.g. ECCM, i.e. electronic counter-counter measures
-
- 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
- G01S7/4021—Means for monitoring or calibrating of parts of a radar system of receivers
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The present invention relates to a kind of dual polarization radar antennas to receive system, on balance support arm by the pitching joint that receiver is mounted on to radar antenna, it includes the almost the same horizontal receiving channel of performance parameter and vertical reception channel, realize the transformation of radio frequency to intermediate frequency, it is sent into DRSP after converting using A/D to be calculated, reduces signal from antenna transmission to this section of path loss received in cabinet.
Description
Technical field
The present invention relates to field of radar, and in particular to a kind of dual polarization radar antenna reception system.
Background technique
Radar receiver is the important component of radar system, and major function is the faint letter received to radar antenna
It number preselected, amplified, frequency conversion, filtering, demodulation digitized processing, while inhibiting to make an uproar in external interference noise and machine
Sound makes echo-signal holding target information as much as possible, so as to further signal processing and data processing.
It can be divided into microwave receiving unit, temperature controller unit and power supply and three parts of control unit, each section by function
Function and composition are as follows:
Microwave receiving unit: receiving target echo signal, carries out low noise amplification, and be mixed with local oscillation signal, down coversion
Export intermediate-freuqncy signal.The white noise signal that noise source generates is injected into receiving channel by TCH test channel.Protective switch is emitting
Period shutdown avoids transmitting leakage signal from burning receiving channel device.
Temperature controller unit: it is made of temperature controller and heat insulation sealing device.The cooling capacity of temperature controller offer component cooling requirement.Every
Heat and sealing device solve gas heat-transfer, solid heat transfer realizes the temperature environment of microwave components cooling requirement.
Power supply and control unit: providing the power supply and carry out temperature control to temperature controller that microwave unit and temperature controller need,
Make microwave unit work in stationary temperature environment；In real time by the working status parameter reporting terminal computer of system, and it is real
When the running parameter of system is monitored online.
Disadvantage of the prior art is that: receiver section is located at the reception cabinet in Radar machine room, distribution mode such as Fig. 1
Shown, the disadvantages of this solution is that echo-signal is larger in the transmission loss of feeder system；The finger of the devices such as two-way rotary joint
Mark rises and falls and is affected to polarization parameter, influences polarization detection accuracy.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of dual polarization radar antennas to receive system, leads to
It crosses on the balance support arm that receiver is mounted on to the pitching joint of radar antenna, it includes that the almost the same level of performance parameter connects
Channel and vertical reception channel are received, realizes the transformation of radio frequency to intermediate frequency, DRSP is sent into after converting using A/D and is calculated, is subtracted
Small signal is from antenna transmission to this section of path loss received in cabinet.
The purpose of the present invention is achieved through the following technical solutions:
A kind of dual polarization radar antenna reception system, the system are made of indoor section and outdoor section, shown outdoor section peace
On the balance support arm of radar antenna turning platform two sides；
The outdoor section includes:
The H formed is sequentially connected by directional coupler H1, phase shifter H, circulator H, TRL pipe _ H, PIN switch _ H, receiver _ H
Linear polarization echo reception channel；
The V formed is sequentially connected by directional coupler V1, attenuator V, circulator V, TRL pipe _ V, PIN switch _ V, receiver _ V
Linear polarization echo reception channel；
It further include DRSP, optical transmitter and receiver A, power splitter, waveguide switch, directional coupler B, the receiver _ H and receiver _ V difference
It is connected to DRSP, the DRSP is connected to optical transmitter and receiver A；
The directional coupler B is connected to the power splitter by the waveguide switch, and the power splitter is connected to annular all the way
Device V, another way are connected to the circulator H by the waveguide switch；
The indoor section includes host computer, optical transmitter and receiver B, directional coupler A, harmonic filter, KLY, and the optical transmitter and receiver B is used for
It receives the weather information of the optical transmitter and receiver A and is uploaded to the host computer；
The KLY, harmonic filter, directional coupler A are sequentially connected, and output signal passes sequentially through the side of the radar antenna
Position rotary joint, elevation rotary joint are connect with the directional coupler B.
Further, the TRL pipe _ H and TRL pipe _ V is discharge prevention pipe.
Further, the outdoor section is packaged in radar module body, and a TEC constant temperature is provided in the radar cabin
Device, the TEC thermostat are cold by semiconductor chilling plate, hot-side heat dissipation wing, radiator fan, power supply, temperature sensor, metal
Board group at；
The metallic cold plate, semiconductor chilling plate, hot-side heat dissipation wing, radiator fan are successively overlapped installation, and the metallic cold plate is tight
Patch is by cooler part, and the temperature sensor is installed on metallic cold plate or by cold device surface, by temperature controller to the semiconductor system
Cold cryogenic temperature is set, and carries out closed loop adjusting by the temperature feedback of the temperature sensor, to reach refrigeration
Constant temperature.
Further, the external temperature of the radar cabin is -40 DEG C~+60 DEG C, and internal temperature is 20 DEG C~30 DEG C,
Accuracy of temperature control≤± 0.5 DEG C.
The beneficial effects of the present invention are: having removed the reception received in cabinet using the receiver scheme for being mounted on antenna
Thermomechanical components increase receiver unit on the balance support arm in antenna pitching joint.It includes the almost the same level of performance parameter
The transformation of radio frequency to intermediate frequency is realized in receiving channel and vertical reception channel, and DRSP is sent into after converting using A/D and is calculated.
Advantage is to reduce signal from antenna transmission to this section of path loss received in cabinet.On the one hand reduce cable Insertion Loss,
H caused by standing wave and phase and the inconsistent influence to polarization parameter measurement of bis- channel characteristics of V；On the other hand, due to
Echo-signal transmission path shortens, and decaying is reduced, and reduces double-channel signal by extraneous or electromagnetic interference mutually chance, mentions
The high quality of signal, also helps detection of the radar to weak signal；It also avoids orientation simultaneously and elevation angle rotary joint causes
Amplitude and phase error influence.Transmitter is divided into bis- channels H and V by function behind single channel orientation joint, avoids two-way pass
The random error of amplitude-phase inconsistent introducing at random when section rotation.
The receiver scheme for being mounted on antenna additionally uses the receiver case of favorable sealing property, and semiconductor is used in case
Temperature control Refrigeration Technique guarantees operation of receiver in stationary temperature environment, to effectively reduce temperature change to feeder line and reception
The influence in channel improves the gain and phase stability of receiver.
Detailed description of the invention
Fig. 1 is prior art composition schematic diagram；
Fig. 2 is composition schematic diagram of the present invention；
Fig. 3 is receiver unit block diagram；
Fig. 4 is receiving unit functional block diagram；
Fig. 5 is TEC refrigerator refrigeration characteristic curve；
Fig. 6 is data acquisition and procession flow chart；
Fig. 7 is TEC temperature controller work system block diagram；
Fig. 8 is TEC thermostat structural schematic diagram.
Specific embodiment
Technical solution of the present invention is described in further detail combined with specific embodiments below, but protection scope of the present invention is not
It is confined to as described below.
As shown in Fig. 2, a kind of dual polarization radar antenna receives system, which is made of indoor section and outdoor section,
Shown outdoor section is mounted on the balance support arm of radar antenna turning platform two sides；
Outdoor section includes:
The H formed is sequentially connected by directional coupler H1, phase shifter H, circulator H, TRL pipe _ H, PIN switch _ H, receiver _ H
Linear polarization echo reception channel；
The V formed is sequentially connected by directional coupler V1, attenuator V, circulator V, TRL pipe _ V, PIN switch _ V, receiver _ V
Linear polarization echo reception channel；
It further include DRSP, optical transmitter and receiver A, power splitter, waveguide switch, directional coupler B, receiver _ H and receiver _ V are separately connected
Optical transmitter and receiver A is connected to DRSP, DRSP；
Directional coupler B is connected to power splitter by waveguide switch, and power splitter is connected to circulator V all the way, and another way passes through wave
It leads switch and is connected to circulator H；
Indoor section includes host computer, optical transmitter and receiver B, directional coupler A, harmonic filter, KLY, and optical transmitter and receiver B is for receiving light end
The weather information of machine A is simultaneously uploaded to host computer；
KLY, harmonic filter, directional coupler A are sequentially connected, and the orientation rotation that output signal passes sequentially through radar antenna closes
Section, elevation rotary joint and directional coupler B connection.
Working principle explanation: this programme respectively amplifies the radiofrequency signal of the H and V lines polar echo from antenna,
Filtering, frequency conversion, digital quantization and Signal Pretreatment provide two-way digital medium-frequency signal for signal processor to extract meteorological letter
Breath.
Around the full coherent of radar complete machine, the performance requirement of dual-polarization；Frequency synthesizer provides pulse modulated microwave letter
Number, as the pumping signal of transmitter, signal processor sampled clock signal is provided, realizes the full coherent function of radar complete machine.
The signal path of receiver is completed analog- and digital- receiving area's science and engineering and is made；Channel by receiving front-end (analog portion) and
Digital intermediate frequency receives (DRSP) two parts composition.Composition block diagram is as shown in Figure 3.
Signal path is received to be formed by putting in PIN switch, low noise, preselection filter, mixing etc..
Echo-signal from antenna obtains 30MHz analog intermediate frequency echo information by amplification, down coversion, is sent into DRSP
Carry out the processing output stream such as ADC conversion, Digital Down Convert.
The test signal generated by frequency synthesizer, is the calibration testing source of system, combines sum number by function switch-dividing
Attenuator is controlled, the transmission of test signal and power control channel are constituted.Under terminal control, system can complete online two-way and connect
The width for receiving channel is mutually smoothed, and realizes automatic on-line calibration work.
Wherein microwave receiving element circuit is as shown in figure 4, receiving channel is realized radiofrequency signal amplification, filtering, down coversion
To intermediate-freuqncy signal, it is supplied to rear class ADC and carries out digital quantization and Signal Pretreatment.By PIN switch, low-noise amplifier, band logical
The composition such as filter, frequency mixer, intermediate frequency amplifier.
PIN switch tests signal for interpolation, to reach the detection function to receiving channel；Low-noise amplifier reduction connects
Receipts machine noise coefficient, substantially increases the sensitivity of receiver；Filter passes through echo-signal, to band outside interference,
Noise and image frequency signal have higher inhibition；After frequency mixer is mixed the radiofrequency signal by amplification filtering with local oscillation signal
Generate 30MHz intermediate-freuqncy signal；The intermediate-freuqncy signal of mixing output is carried out low noise amplification by intermediate frequency amplifier.
Led to by the test signal that frequency synthesizer, numerical-control attenuator, switch combination, noise source, delay line constitute system
Road is used for transmission and selects unlike signal and different paths, and numerical-control attenuator therein is for changing test signal power size.
Noise signal is injected separately by two signal paths, measurement system noise coefficient, Verification Receiver two using standard solid noise source
The small signal detection capability in channel；By transmitter output signal after the amplification of microwave relay wire delay, it is logical to be injected separately into two signals
Road, the phase stability of instrumentation radar system check the coherence of system；By the interior insertion two respectively of transmitting coupling BURST signal
Signal path, the width for two paths of signals interchannel are mutually smoothed；As KD signal, alerted for intensity calibration.
Control unit is that the work to receiver carries out process control, check receiver working condition, to each portion of receiver
The fault-signal of feedback is divided to be analyzed, judged, handled.
Control unit receives the control signal that the main monitoring of radar issues by serial port, and in real time to the main prison of radar
Control transmission of monitoring signal and fault-signal.
Monitoring collection is made of the independent detection circuit inside monitoring module and receiving unit.Monitoring module is for receiving list
The detection and monitoring of member.It is main to complete four partial functions: first is that DC voltage and field discharge stream that receiver is used, radio frequency,
Intermediate frequency rectified signal carries out A/D sampling；Second is that sending out control code for receiver；The status signal of three pairs of receivers is monitored；
Fourth is that the monitoring result of each section is sent to terminal by serial ports, and receive the control command that terminal is sent.
The detection signal of receiver output is divided into radio-frequency power detection signal, voltage sampling signal, current sampling signal,
Temperature sampling signal, they can take out from respective detection sampled point respectively, and test point information switchs to voltage by sensor, then
Digital signal is quantized by ADC, serial data, data acquisition and procession process such as Fig. 6 are finally switched to by processor.
As a kind of preferred embodiment, TRL pipe _ H and TRL pipe _ V is discharge prevention pipe, and outdoor section is packaged in radar module
In body 1, a TEC thermostat is provided in radar cabin 1, as shown in figure 8, TEC thermostat by semiconductor chilling plate 2,
Hot-side heat dissipation wing 3, radiator fan 4, power supply 5, temperature sensor 7, metallic cold plate 8 form；Metallic cold plate 8, semiconductor chilling plate
2, hot-side heat dissipation wing 3, radiator fan 4 are successively overlapped installation, and metallic cold plate 8 is close to by cooler part 6, here by cooler part 6 just
Refer to receiving channel, be specifically the low-noise amplifier of receiving channel, temperature sensor 7 be installed on metallic cold plate 8 or by
6 surface of cooler part is set, the refrigeration characteristic of semiconductor chilling plate 2 by cryogenic temperature of the temperature controller to semiconductor chilling plate 2
With reference to shown in Fig. 5.And closed loop adjusting is carried out by the temperature feedback of temperature sensor 7, to reach refrigerated constant temperature, radar cabin 1
External temperature be -40 DEG C~+60 DEG C, internal temperature be 20 DEG C~30 DEG C, accuracy of temperature control≤± 0.5 DEG C.
The composition block diagram of temperature controller is as shown in fig. 7, TEC temperature controller is obtained currently by the intracorporal temperature sensor of incubator
Environment temperature, temperature sampling analog signal through filtering and amplifying circuit and A/D sample circuit to single-chip microcontroller main control chip, using temperature
Control algolithm, for adjusting the polarity and output power of TEC refrigerator DC drive circuit, reaches and cuts compared with set temperature value
Change refrigerating/heating and temperature controlled purpose.
The above is only the preferred embodiment of the present invention, it should be understood that the present invention is not limited to shape described herein
Formula should not be regarded as an exclusion of other examples, and can be used for other combinations, modifications, and environments, and can be herein
In contemplated scope, modifications can be made through the above teachings or related fields of technology or knowledge.And what those skilled in the art were carried out changes
Dynamic and variation does not depart from the spirit and scope of the present invention, then all should be within the scope of protection of the appended claims of the present invention.
Claims (4)
1. a kind of dual polarization radar antenna receives system, which is characterized in that the system is made of indoor section and outdoor section, institute
Show that outdoor section is mounted on the balance support arm of radar antenna turning platform two sides；
The outdoor section includes:
The H formed is sequentially connected by directional coupler H1, phase shifter H, circulator H, TRL pipe _ H, PIN switch _ H, receiver _ H
Linear polarization echo reception channel；
The V formed is sequentially connected by directional coupler V1, attenuator V, circulator V, TRL pipe _ V, PIN switch _ V, receiver _ V
Linear polarization echo reception channel；
It further include DRSP, optical transmitter and receiver A, power splitter, waveguide switch, directional coupler B, the receiver _ H and receiver _ V difference
It is connected to DRSP, the DRSP is connected to optical transmitter and receiver A；
The directional coupler B is connected to the power splitter by the waveguide switch, and the power splitter is connected to annular all the way
Device V, another way are connected to the circulator H by the waveguide switch；
The indoor section includes host computer, optical transmitter and receiver B, directional coupler A, harmonic filter, KLY, and the optical transmitter and receiver B is used for
It receives the weather information of the optical transmitter and receiver A and is uploaded to the host computer；
The KLY, harmonic filter, directional coupler A are sequentially connected, and output signal passes sequentially through the side of the radar antenna
Position rotary joint, elevation rotary joint are connect with the directional coupler B.
2. dual polarization radar antenna according to claim 1 receives system, which is characterized in that the pipe TRL_H and TRL
Pipe _ V is discharge prevention pipe.
3. dual polarization radar antenna according to claim 1 receives system, which is characterized in that the outdoor section is packaged in
In radar cabin (1), a TEC thermostat is provided on the radar cabin (1), the TEC thermostat is by semiconductor
Cooling piece (2), hot-side heat dissipation wing (3), radiator fan (4), power supply (5), temperature sensor (7), metallic cold plate (8) composition；
The metallic cold plate (8), semiconductor chilling plate (2), hot-side heat dissipation wing (3), radiator fan (4) are successively overlapped installation, institute
It states metallic cold plate (8) to be close to by cooler part (6), the temperature sensor (7) is installed on metallic cold plate (8) or by cooler part (6)
Surface is set by cryogenic temperature of the temperature controller to the semiconductor chilling plate (2), and passes through the temperature sensor (7)
Temperature feedback carry out closed loop adjusting, to reach refrigerated constant temperature.
4. dual polarization radar antenna according to claim 3 receives system, which is characterized in that the radar cabin (1)
External temperature is -40 DEG C~+60 DEG C, and internal temperature is 20 DEG C~30 DEG C, accuracy of temperature control≤± 0.5 DEG C.
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|---|---|---|---|
| CN201910808128.3A CN110515042A (en) | 2019-08-29 | 2019-08-29 | Dual polarization radar antenna receives system |
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|---|---|---|---|
| CN201910808128.3A CN110515042A (en) | 2019-08-29 | 2019-08-29 | Dual polarization radar antenna receives system |
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