CN108919270A - A kind of single-emission and double-receiving CW with frequency modulation phased array radar system - Google Patents
A kind of single-emission and double-receiving CW with frequency modulation phased array radar system Download PDFInfo
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- CN108919270A CN108919270A CN201810898420.4A CN201810898420A CN108919270A CN 108919270 A CN108919270 A CN 108919270A CN 201810898420 A CN201810898420 A CN 201810898420A CN 108919270 A CN108919270 A CN 108919270A
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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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/91—Radar or analogous systems specially adapted for specific applications for traffic control
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Abstract
The present invention relates to a kind of single-emission and double-receiving CW with frequency modulation phased array radar system, radar system includes：One transmitting antenna, transmitting antenna are used for radiated radio frequency (RF) signal；Two receiving antennas, receiving antenna are used to receive the echo radiofrequency signal of target；Transceiver module, transceiver module includes the signal receives link that signal generates link and two-way all the way, signal generates link for generating baseband signal and obtaining radiofrequency signal according to baseband signal, and signal receives link is for receiving echo radiofrequency signal and obtaining echo baseband signal according to echo radiofrequency signal；Processing module generates link generation baseband signal for controlling signal, and for the phase identification and digit phase processing to echo baseband signal；Power module, for powering.Single-shot of the invention receives CW with frequency modulation phased array radar system more and uses the angle measurement of binary channels phase comparing method, by the secondary receiving antenna phase difference of measurement two, so that it is determined that azimuth where target, the target angle information calculated precision with higher.
Description
Technical field
The invention belongs to radar system design field more particularly to a kind of single-emission and double-receiving CW with frequency modulation phased-array radar systems
System.
Background technique
" low small slow " target, refers to all or part of spies such as flying height is low, movement velocity is slow, Radar Cross Section is small
The small-sized aerial craft of sign and object drifted by wind.Recently as the development in domestic unmanned plane market, small drone etc. " low small slow " mesh
Mark product gradually moves towards huge numbers of families, but due to the blank that China supervises unmanned plane, unmanned plane " black to fly " phenomenon is serious,
The safety of state and society is gradually threatened.
Optical detection (visible light/infrared), thunder can be divided into for the detection mode of small drone etc. " low small slow " target
Up to detection, passive detection etc., due to radar detection have operating distance is remote, the round-the-clock round-the-clock ability to work of tool and answered extensively
For in unmanned plane security protection monitoring system.
Radar detection is divided into two kinds of Detecting Systems of pulse radar and continuous wave radar again.Pulse radar detection range is remote, but
There are blind range zone, close target can not be detected；Continuous wave radar low coverage non-blind area is particularly suitable for the low coverage of " low small slow " target
From detection.
The continuous wave system for mostly using single-shot list to receive for the detection radar of " low small slow " target at present, but the form radar
There are problems that being unable to measure pitch angle.
Need one kind that can accurately measure the radar system at " low small slow " target pitch angle thus.
Summary of the invention
The object of the present invention is to provide a kind of single-emission and double-receiving CW with frequency modulation phased array radar systems, for solving above-mentioned ask
Topic.
In order to achieve the above objectives, the technical solution adopted by the present invention is that：A kind of single-emission and double-receiving CW with frequency modulation phased array thunder
Up to system, the radar system includes：
One transmitting antenna, the transmitting antenna are used for radiated radio frequency (RF) signal；
Two receiving antennas, the receiving antenna are used to receive the echo radiofrequency signal of target；
Transceiver module, the transceiver module include the signal receives link that signal generates link and two-way all the way, the letter
Number generate link is connected with the transmitting antenna, for generating baseband signal and obtaining radio frequency letter according to the baseband signal
Number, the signal receives link is connected one by one with the receiving antenna, for receiving echo radiofrequency signal and according to the echo
Radiofrequency signal obtains echo baseband signal；
Processing module, the processing module generate link for controlling the signal and generate baseband signal, and for pair
The digit phase of the echo baseband signal is handled and phase identifies to obtain the detection information of target；
Power module, the power module are used to power to transceiver module, transmitting antenna, receiving antenna and processing module.
Wherein, the receiving antenna is Passive phased-array antenna.
Wherein, the receiving antenna quantity is identical as the signal receives link quantity.
Wherein, the transceiver module includes signal generator module, and the signal generator module is for generating modulation continuous wave.
Wherein, it includes phase difference identification module that the processing module, which includes processing module, and the phase difference identification module is used
In to by base band echo-signal carry out phase difference identification, and carry out to identified result be added.
Wherein, it further includes digit phase processing module that the processing module, which further includes processing module, at the digit phase
The voltage that reason module is used to export the phase difference identification module carries out digital conversion, and carries out to the result after number conversion
Compare and exports.
Wherein, the detection information includes target direction angle, target range and target velocity.
Single-emission and double-receiving CW with frequency modulation phased array radar system of the invention uses the angle measurement of binary channels phase comparing method, passes through measurement
Two secondary receiving antenna phase differences, so that it is determined that azimuth where target, the target angle information calculated is with higher precisely
Degree.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and be used to explain the principle of the present invention together with specification.
Fig. 1 is " low small slow " target acquisition Principles of Radar block diagram.
Fig. 2 is interferometry angle measuring principle figure.
Appended drawing reference：
Electronic unit, 11- transceiver module, 12- processing module, 13- power module, 111- low-noise amplifier, 112- are mixed
Frequency device, 113- emit local oscillation signal, 114-FMCW signal generator module；
2- antenna element, 21- transmitting antenna, 22- receiving antenna.
Specific embodiment
To keep the purposes, technical schemes and advantages of the invention implemented clearer, below in conjunction in the embodiment of the present invention
Attached drawing, technical solution in the embodiment of the present invention is further described in more detail.
It is as shown in Figure 1 single-emission and double-receiving CW with frequency modulation phased array radar system structural framing figure of the invention, for visiting
Survey " low small slow " target.The single-emission and double-receiving CW with frequency modulation phased-array radar system being used for " low small slow " target acquisition of the invention
System, using binary channels phase comparing method angle measurement, by the secondary receiving antenna phase difference of measurement two, so that it is determined that azimuth where target.Solution
Whether the target angle information of calculating is accurate, affects the accuracy of photoelectricity and percussion system.
Single-emission and double-receiving CW with frequency modulation phased array radar system of the invention mainly includes two parts：Electronic unit 1 and day
Line unit 2, wherein electronic unit 1 includes transceiver module 11, processing module 12 and power module 13；Antenna element 2 includes transmitting
Antenna 21 and receiving antenna 22.
It include a secondary transmitting antenna 21 in antenna element 1, transmitting day 21 is used for radiated radio frequency (RF) signal, and at least two secondary
Receiving antenna 22 after two amplitude receiver antennas 22 are by finishing receiving binary channels echo-signal, then through I/Q is orthogonal is mixed, filters, puts
After big, output includes the difference frequency signal apart from information such as speed, after the processing such as A/D sampling, FFT, threshold judgement, completes to mesh
The detection of target distance, speed and angle.
The transceiver module 11 for including in electronic unit 1, transceiver module 11 include for generating signal generation link all the way
And the signal receives link of at least two-way, signal generate link be connected with transmitting antenna 21, for generate baseband signal and according to
Baseband signal obtains radiofrequency signal, and signal receives link is connected one by one with receiving antenna 22, for receive echo radiofrequency signal and
Echo baseband signal is obtained according to echo radiofrequency signal；Processing module 12, processing module generate link generation for controlling signal
Baseband signal, and identify for the phase to echo baseband signal and digit phase processing is to obtain the detection information of target；
Power module 13, power module 13 are used to power to transceiver module 11, transmitting antenna 21, receiving antenna 22 and processing module 12.
In the present invention, receiving antenna 22 uses Passive phased-array antenna, have phase can the advantages such as agile, can be effective
Ground fight narrowband aim at the active interference of formula, have many advantages, such as increasing detection range, improve angle measurement accuracy, kill the sea clutter.
Transceiver module 11 includes signal generator module, and signal generator module is for generating modulation continuous wave FMCW.Using tune
Frequency continuous wave (FMCW) phased-array radar and the system architecture for cooperating multicast of the invention, can with precise measurement target away from
From, speed and angle.
" low small slow " target acquisition radar system operating frequency range 15GHz~16GHz in the present embodiment.
Single-emission and double-receiving CW with frequency modulation phased array radar system of the invention realizes that process is as follows：
1, the present invention is using the double radar transmit-receive systems received of a hair, and wherein receive-transmit system includes linear frequency modulation continuous wave transmitting
Link, bicoherence receives link.To realize that the resolving for carrying out phase difference to two groups of receives links is handled, first by radar emission chain
Road provides common source with the local oscillation signal of phase constant amplitude for receives link.
The transmitting link of 2 transmitting radar antennas 21 first generates the FMCW signal of Ku wave band, forms Ku wave after mixing amplification
Segment signal (up-conversion) is radiated sky by transmitting antenna 21；
3 since receiving antenna 22 is divided into two pairs, and receiving same echo becomes interference signal.The target reflection received
Electromagnetic wave is approximately plane wave, since there are wave path-differences for different receivers reception target reflection electromagnetic wave in every group, to lead
Cause generation corresponding phase poor.
4 every groups of receives links carry out phase difference identification processing to the phase difference generated, and processing result is exported to number
Word phase processing module.
After 5, digit phase processing module to the phase difference of two groups of receivers two channel signals that identify that treated into
The processing of row phase-detection, i.e., to two channel signals successively carry out A/D sampling, digit phase compares and deflection calculates, finally
Exportable accurate target range, speed and angle.
Wherein A/D is sampled as multichannel while sampling.
Wherein digit phase processing module includes multiple with A/D mapping function, digit phase comparing function and deflection
The device or module of computing function.
It should be noted that the processing module in the present invention includes phase difference identification module (being located in DPS hardware), phase
The voltage of poor identification module output is directly proportional to the phase difference of input signal, when specific implementation, in order to improve the precision of phase discriminator,
Using transmitter local oscillation signal input module output local oscillation signal as auxiliary signal, respectively with two-way receiver export quilt
It surveys signal and carries out phase difference identification, and identified result is added, in combination with " quadratic interpolation subdivision " to two-way receiver
Phase difference carry out precise measurement.
The specific internal composition of the phase difference identification module includes two-way sampler and corresponding holding circuit, wherein keeping electricity
Road is based on capacitor.Wherein every road sampler is made of 4 diodes.Every its corresponding holding circuit sequence phase of road sampler
Even.
Phase difference discrimination process is：Every road sampler obtains the output voltage of every road receiver respectively, then passes through 4 two
Pole pipe sampling, and be output in digital phase processor module after subsequent holding circuit carries out voltage holding.
The phase difference identification module number that the method for the present invention need to use is identical as radar transmit-receive device group number.
Wherein, the present invention in processing module further include digit phase processing module, each phase difference identification module it is defeated
Access digit phase processing module carries out A/D transformation out.
It is only used in the present embodiment to two A/D and is converted, A/D transformation is realized using 14 high-precision chips.
The specific course of work of digital phase processor module is as follows：It is defeated that every road ADC obtains single channel phase difference identification module
Voltage out, and ADC transformation is carried out, transformed data result exports after the bit comparison of correlated digital phase, deflection algorithm.
Each radar emission link is connected with the local oscillation signal input module of two coherent reception links respectively, and two relevant
The filter output of receiver is connected to phase difference identification module,
Shown in Figure 2, target direction 10 is oblique line directions, two receiving antennas 22 into θ angle with radar receiving antenna normal direction
Parallax range between (with many receiving units in each receiving antenna 22) is D, and receiving antenna 22 uses inactive phased array
Antenna has phase can the advantages such as agile；Low-noise amplifier 111, frequency mixer 112, transmitting local oscillation signal 113 and FMCW signal
Generation module 114 is all integrated in transceiver module.The 11 inside corresponding antenna of two receives links of radar transmit-receive module receives same
One echo becomes interference signal, and output to digit phase handles mould after the phase difference of generation is added by phase difference identification module
Block, digit phase processing module resolve final data to obtain high-precision deflection.
The above, optimal specific embodiment only of the invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of the claim
Subject to enclosing.
Claims (7)
1. a kind of single-emission and double-receiving CW with frequency modulation phased array radar system, which is characterized in that the radar system includes：
One transmitting antenna (21), the transmitting antenna are used for radiated radio frequency (RF) signal；
Two receiving antennas (22), the receiving antenna are used to receive the echo radiofrequency signal of target；
Transceiver module (11), the transceiver module include the signal receives link that signal generates link and two-way all the way, the letter
Number generate link is connected with the transmitting antenna, for generating baseband signal and obtaining radio frequency letter according to the baseband signal
Number, the signal receives link is connected one by one with the receiving antenna, for receiving echo radiofrequency signal and according to the echo
Radiofrequency signal obtains echo baseband signal；
Processing module (12), the processing module generate link for controlling the signal and generate baseband signal, and for pair
The phase of the echo baseband signal identifies and digit phase is handled to calculate the detection information of target；
Power module (13), the power module are used to power to transceiver module, transmitting antenna, receiving antenna and processing module.
2. single-shot according to claim 1 receives CW with frequency modulation phased array radar system more, which is characterized in that the reception
Antenna (22) is Passive phased-array antenna.
3. single-shot according to claim 1 or 2 receives CW with frequency modulation phased array radar system more, which is characterized in that described
Receiving antenna (22) quantity is identical as the signal receives link quantity.
4. single-shot according to claim 1 receives CW with frequency modulation phased array radar system more, which is characterized in that the transmitting-receiving
Module (11) includes signal generator module, and the signal generator module is for generating modulation continuous wave.
5. single-shot according to claim 1 receives CW with frequency modulation phased array radar system more, which is characterized in that the processing
Module (12) includes that processing module (12) includes phase difference identification module, and the phase difference identification module is used for by base band echo
Signal carries out phase difference identification, and be added to identified result.
6. single-shot according to claim 5 receives CW with frequency modulation phased array radar system more, which is characterized in that the processing
Module (12) further includes that processing module (12) further includes digit phase processing module, and the digit phase processing module is used for institute
The voltage for stating the output of phase difference identification module carries out digital conversion, and the result after number conversion is compared and is exported.
7. single-shot according to claim 1 receives CW with frequency modulation phased array radar system more, which is characterized in that the detection
Information includes target direction angle, target range and target velocity.
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| CN201810898420.4A CN108919270A (en) | 2018-08-08 | 2018-08-08 | A kind of single-emission and double-receiving CW with frequency modulation phased array radar system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109669166A (en) * | 2019-01-08 | 2019-04-23 | 长沙莫之比智能科技有限公司 | The small-sized MIMO radar sensor of short distance in high-precision wide wave beam |
| CN110133638A (en) * | 2019-05-21 | 2019-08-16 | 北京欧远致科技有限公司 | It can be used for detecting the radar system and its application method of low small slow target object |
| CN110398739A (en) * | 2019-08-15 | 2019-11-01 | 成都远望探测技术有限公司 | A kind of millimeter wave cloud detection radar system |
| CN110488255A (en) * | 2019-09-09 | 2019-11-22 | 上海无线电设备研究所 | A kind of phased-array radar pulse high-resolution angle measuring system and method |
| CN110988810A (en) * | 2019-12-19 | 2020-04-10 | 中国电子科技集团公司第二十研究所 | 300-plus-2000 MHz broadband digital TR (transmitter-receiver) component |
| CN111665492A (en) * | 2020-06-04 | 2020-09-15 | 北京通广龙电子科技有限公司 | Airborne distributed comprehensive radio frequency sensor system |
| CN111856439A (en) * | 2020-07-17 | 2020-10-30 | 深圳市安卫普科技有限公司 | Nonlinear node detection method and detector |
| CN112361057A (en) * | 2020-11-17 | 2021-02-12 | 上海科勒电子科技有限公司 | Microwave induction control system, control method and control device of water outlet device |
| CN112379370A (en) * | 2020-09-30 | 2021-02-19 | 中国科学院空天信息创新研究院 | SAR system based on full silicon-based chip |
| CN112859104A (en) * | 2019-11-09 | 2021-05-28 | 北醒（北京）光子科技有限公司 | Detection method, detection device and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109669166A (en) * | 2019-01-08 | 2019-04-23 | 长沙莫之比智能科技有限公司 | The small-sized MIMO radar sensor of short distance in high-precision wide wave beam |
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| CN110398739A (en) * | 2019-08-15 | 2019-11-01 | 成都远望探测技术有限公司 | A kind of millimeter wave cloud detection radar system |
| CN110488255A (en) * | 2019-09-09 | 2019-11-22 | 上海无线电设备研究所 | A kind of phased-array radar pulse high-resolution angle measuring system and method |
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| CN112859104A (en) * | 2019-11-09 | 2021-05-28 | 北醒（北京）光子科技有限公司 | Detection method, detection device and storage medium |
| CN110988810A (en) * | 2019-12-19 | 2020-04-10 | 中国电子科技集团公司第二十研究所 | 300-plus-2000 MHz broadband digital TR (transmitter-receiver) component |
| CN111665492A (en) * | 2020-06-04 | 2020-09-15 | 北京通广龙电子科技有限公司 | Airborne distributed comprehensive radio frequency sensor system |
| CN111856439A (en) * | 2020-07-17 | 2020-10-30 | 深圳市安卫普科技有限公司 | Nonlinear node detection method and detector |
| CN112379370A (en) * | 2020-09-30 | 2021-02-19 | 中国科学院空天信息创新研究院 | SAR system based on full silicon-based chip |
| CN112379370B (en) * | 2020-09-30 | 2024-02-06 | 中国科学院空天信息创新研究院 | SAR system based on all-silicon-based chip |
| CN112361057A (en) * | 2020-11-17 | 2021-02-12 | 上海科勒电子科技有限公司 | Microwave induction control system, control method and control device of water outlet device |
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Application publication date: 20181130 |