CN207965126U - A kind of portable passive Radar Electromagnetic Environment test device - Google Patents
A kind of portable passive Radar Electromagnetic Environment test device Download PDFInfo
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- CN207965126U CN207965126U CN201820462106.7U CN201820462106U CN207965126U CN 207965126 U CN207965126 U CN 207965126U CN 201820462106 U CN201820462106 U CN 201820462106U CN 207965126 U CN207965126 U CN 207965126U
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- receiving channel
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Abstract
The utility model discloses a kind of portable passive Radar Electromagnetic Environment test devices, it is related to the radar exploration technique field monitored to aerial target, including direct signal receiving channel, echo signal receiving channel, frequency synthesizer and memory, memory is equipped with convenient for the data transmission interface of connection portable computer.The utility model small in volume is readily transported and lays；Through and multipath clutter characteristic parameter can be measured, the Effect on Detecting of Accurate Prediction passive radar in the present context is the powerful for selecting passive radar site；Device greatly improves the working efficiency of passive radar addressing, mitigates workload, reduces cost.
Description
Technical field
The radar exploration technique field that the utility model is related to be monitored to aerial target, more particularly to a kind of portable nothing
Source Radar Electromagnetic Environment test device.
Background technology
It is low to Flight device, consumer level unmanned plane etc. with the development of General Aviation industry and civilian unmanned plane industry
The detection and monitoring of absolutely empty domain aircraft become more and more important, and low altitude airspace aircraft altitude is low, speed is slow, radar is anti-
It is small to penetrate area, belongs to typical low slow small type target.Such target flight height is low, is influenced by earth curvature and landform
Greatly, it is easy to be blocked；Flying speed is slow, reflective surface area is small, and weak echo signal is mingled in strong surface feature clutter signal, is added
The big difficulty of target acquisition.All the time, it is difficult one handled well that the detection to low slow Small object and monitoring, which are existing radars,
A problem.Passive radar irradiates target using external TV and Radio Service etc. as irradiation source, receives the echo letter of target reflection
Number complete detection, positioning and tracking to aerial target.As a result of continuous wave irradiation, receive and dispatch bistatic mode detect and first
Inlet signal treatment technology so that passive radar has good low slow Detectability for Small Target.
The selection of passive radar site needs to consider through and the ground strong multipath clutter signal of substance environment intensity, surrounding other
Signal can produce bigger effect the performance of passive radar many factors such as the interference of the frequency range, the quality of the siting of station.It wants
Measurement obtains these influences of environment electromagnetics factor to passive radar working performance, relies solely on the testers such as traditional frequency spectrograph
It is inadequate that device, which simply measures the parameters such as power, the frequency of various types of signal,.Currently, way is that passive radar is first deployed to addressing
Scene assesses whether to be suitble to for a long time in the local work according to the operation result at scene.But deployment passive radar is needed to scene
Want professional team and a large amount of support vehicles and personnel, long time period with high costs.
Utility model content
The purpose of this utility model is that solve the above-mentioned problems and provides a kind of portable passive radar electromagnetism ring
Border test device.
The utility model is achieved through the following technical solutions above-mentioned purpose：
A kind of portable passive Radar Electromagnetic Environment test device, including direct signal receiving channel, echo signal receive
Channel, frequency synthesizer and memory are equipped with frequency between the direct signal receiving channel and echo signal receiving channel
Synthesizer and memory, the memory are equipped with convenient for the data transmission interface of connection portable computer, the through letter
Number receiving channel includes that direct signal reception antenna, low-noise amplifier, bandpass filter, frequency mixer, filter and intermediate frequency are put
Big device, the echo signal receiving channel include echo signal reception antenna, low-noise amplifier, bandpass filter, frequency mixer,
Filter and intermediate frequency amplifier.
Preferably, the direction of the direct signal reception antenna is directed at the TV and Radio Service as irradiation source, echo signal
The direction alignment of reception antenna needs the spatial domain detected.
Preferably, the data transmission interface is USB interface.
Preferably, the direct signal reception antenna of the direct signal receiving channel is received from the straight of TV and Radio Service
Up to signal, after first passing through the amplification of low-noise amplifier and the filtering of bandpass filter, then it is down-converted to by frequency mixer solid
Determine intermediate frequency, is sent into memory and is carried out under AD acquisitions, number after the filtered device filtering of intermediate frequency and the amplification of intermediate frequency amplifier
Become digital baseband signal after frequency conversion and filtering, last digital baseband signal storage makes for subsequent analysis calculating in memory
With.
Preferably, the direct signal reception antenna of the echo signal receiving channel receives echo signal and first passes through low noise
After the amplification of acoustic amplifier and the filtering of bandpass filter, it then is down-converted to fixed intermediate frequency by frequency mixer, is passed through in intermediate frequency
Being sent into memory after the amplification of filter filtering and intermediate frequency amplifier after carrying out AD acquisitions, Digital Down Convert and filtering becomes several
Word baseband signal, last digital baseband signal storage is calculated for subsequent analysis in memory to be used.
The beneficial effects of the utility model are：The utility model small in volume is readily transported and lays；The present apparatus
Analyzing processing is carried out to collected two paths of signals, intensity, the multipath clutter of direct signal and multipath clutter signal can be obtained
The characterisitic parameters such as extended distance, the doppler spread of signal, the clutter recognition that assessment passive radar can reach is horizontal and detects
The important parameters such as ability assess whether there is the interference source and its impact effect for seriously affecting passive radar work, are selection nothings
The powerful of source radar site；Device greatly improves the working efficiency of passive radar addressing, mitigates workload, reduces cost.
Description of the drawings
Fig. 1 is the comprising modules figure of the utility model；
Fig. 2 is the operation principle schematic diagram of the utility model.
Specific implementation mode
The utility model is described in further detail below in conjunction with the accompanying drawings：
As depicted in figs. 1 and 2, the utility model includes that direct signal receiving channel, echo signal receiving channel, frequency are comprehensive
Clutch and memory.Frequency synthesizer and memory are installed between direct signal receiving channel and echo signal receiving channel,
Memory is equipped with convenient for the data transmission interface of connection portable computer, and coffret is USB interface.Direct signal receives
Channel includes direct signal reception antenna, low-noise amplifier, bandpass filter, frequency mixer, filter and intermediate frequency amplifier.Mesh
Mark signal receiving channel include echo signal reception antenna, low-noise amplifier, bandpass filter, frequency mixer, filter and in
Audio amplifier.The direction of direct signal reception antenna is directed at the TV and Radio Service as irradiation source, for receiving direct signal.Mesh
The direction alignment of mark signal receiving antenna needs the spatial domain detected, for receiving target echo signal.Direct signal receiving channel
Direct signal reception antenna receive the direct signal from TV and Radio Service, first pass through amplification and the band of low-noise amplifier
After the filtering of bandpass filter, it then is down-converted to fixed intermediate frequency by frequency mixer, is put in the filtered device filtering of intermediate frequency and intermediate frequency
Being sent into memory after the amplification of big device after carrying out AD acquisitions, Digital Down Convert and filtering becomes digital baseband signal, finally counts
The storage of word baseband signal is calculated for subsequent analysis in memory to be used.The direct signal reception antenna of echo signal receiving channel
It receives after echo signal first passes through the amplification of low-noise amplifier and the filtering of bandpass filter, then passes through under frequency mixer and become
Frequency arrives fixed intermediate frequency, be sent into after the filtering of intermediate frequency filtered device and the amplification of intermediate frequency amplifier in memory carry out AD acquisitions,
Become digital baseband signal after Digital Down Convert and filtering, last digital baseband signal storage is in memory for subsequent analysis meter
It calculates and uses.Digital baseband signal after storage can be transferred to by USB port in computer, can use software in a computer
The intensity of direct signal and echo-signal, the parameters such as extended distance, doppler spread of echo-signal are analyzed, and use clutter pair
Disappear algorithm evaluation the site clutter cancellation ability, in cancellation process, can also assess whether external interference signals into
Enter to receiving channel, and if the performance of clutter cancellation is influenced in much degree.By to the digital baseband signal after storage
It is handled, so that it may to grasp the through intensity and feature with multipath clutter in the site comprehensively, and with the presence or absence of strong external dry
Disturbing source influences the performance of passive radar.
Passive radar uses full coherent system, it is necessary to assure signal phase characteristic in conversion process can remain not
Become, therefore whole device uses a unified frequency synthesizer, ensures down coversion local oscillation signal and AD sampled clock signals
A reference frequency is all derived from, the phase characteristic of such signal can be always consistent.
Passive radar is extensively using f-m broadcast station, TV station, digital broadcasting-television signal as irradiation source to aerial
Target is detected, and working frequency span is 80MHz~1000MHz.Signal bandwidth is differed from 100KHz to 10MHz.Therefore
Design simulation channel input radio frequency signal working frequency range is 80MHz~1000MHz, intermediate frequency 70MHz, intermediate-frequency bandwidth 10MHz.
In order to adapt to the signal of different bandwidth, the digital filter of different bandwidth is set in memory to correspond to different type irradiation letter
Number bandwidth variation.Due to selecting intermediate frequency for 70MHz, it is 100MHz that AD, which acquires clock setting,.Machine is visited for ease of calculation
It asks the digital baseband signal of storage, hi-speed USB interface is provided on memory, it is convenient to be connected with computer.
Utility model device can acquire and store direct signal and target reflection echo signal in outfield, measure through
With the characteristic parameter of multipath clutter, the Effect on Detecting of Accurate Prediction passive radar in the present context, the apparatus structure is simple, uses
Convenient, of low cost, small in volume is readily transported and lays.
It these are only the preferred embodiment of the utility model, it does not limit the scope of the patent of the present invention.Ability
The those of ordinary skill in domain is appreciated that in the case where not departing from the principles of the present invention and objective can be to these implementations
Mode carries out a variety of variations, modification, replaces and deform.The scope of the utility model is limited by claim and its equivalent.
Claims (5)
1. a kind of portable passive Radar Electromagnetic Environment test device, it is characterised in that：Including direct signal receiving channel, target
Signal receiving channel, frequency synthesizer and memory are pacified between the direct signal receiving channel and echo signal receiving channel
Equipped with frequency synthesizer and memory, the memory is equipped with convenient for the data transmission interface of connection portable computer, institute
It includes direct signal reception antenna, low-noise amplifier, bandpass filter, frequency mixer, filter to state direct signal receiving channel
And intermediate frequency amplifier, the echo signal receiving channel include echo signal reception antenna, low-noise amplifier, bandpass filtering
Device, frequency mixer, filter and intermediate frequency amplifier.
2. a kind of portable passive Radar Electromagnetic Environment test device according to claim 1, it is characterised in that：It is described straight
It is directed at the TV and Radio Service as irradiation source up to the direction of signal receiving antenna, the direction alignment of echo signal reception antenna needs
The spatial domain of detection.
3. a kind of portable passive Radar Electromagnetic Environment test device according to claim 1, it is characterised in that：The number
It is USB interface according to coffret.
4. a kind of portable passive Radar Electromagnetic Environment test device according to claim 1 or 2, it is characterised in that：Institute
The direct signal reception antenna for stating direct signal receiving channel receives the direct signal from TV and Radio Service, first passes through low noise
After the amplification of acoustic amplifier and the filtering of bandpass filter, it then is down-converted to fixed intermediate frequency by frequency mixer, is passed through in intermediate frequency
Being sent into memory after the amplification of filter filtering and intermediate frequency amplifier after carrying out AD acquisitions, Digital Down Convert and filtering becomes several
Word baseband signal, last digital baseband signal storage is calculated for subsequent analysis in memory to be used.
5. a kind of portable passive Radar Electromagnetic Environment test device according to claim 1 or 2, it is characterised in that：Institute
State echo signal receiving channel direct signal reception antenna receive echo signal first pass through low-noise amplifier amplification and
After the filtering of bandpass filter, it then is down-converted to fixed intermediate frequency by frequency mixer, in the filtered device filtering of intermediate frequency and intermediate frequency
Being sent into memory after the amplification of amplifier after carrying out AD acquisitions, Digital Down Convert and filtering becomes digital baseband signal, finally
Digital baseband signal storage is calculated for subsequent analysis in memory to be used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820462106.7U CN207965126U (en) | 2018-04-03 | 2018-04-03 | A kind of portable passive Radar Electromagnetic Environment test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820462106.7U CN207965126U (en) | 2018-04-03 | 2018-04-03 | A kind of portable passive Radar Electromagnetic Environment test device |
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| Publication Number | Publication Date |
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| CN207965126U true CN207965126U (en) | 2018-10-12 |
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| CN201820462106.7U Active CN207965126U (en) | 2018-04-03 | 2018-04-03 | A kind of portable passive Radar Electromagnetic Environment test device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108445455A (en) * | 2018-04-03 | 2018-08-24 | 芜湖泰贺知信息系统有限公司 | A kind of portable passive Radar Electromagnetic Environment test device |
| CN110018445A (en) * | 2019-03-29 | 2019-07-16 | 南京理工大学 | A kind of active and passive electromagnetic environment cognitive method combined |
| CN110703213A (en) * | 2019-10-09 | 2020-01-17 | 中国舰船研究设计中心 | Radar interference environment equivalent physical simulation method and device |
| CN116449114A (en) * | 2023-03-21 | 2023-07-18 | 中国民用航空飞行学院 | Unmanned aerial vehicle airborne electromagnetic environment real-time sensing system |
-
2018
- 2018-04-03 CN CN201820462106.7U patent/CN207965126U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108445455A (en) * | 2018-04-03 | 2018-08-24 | 芜湖泰贺知信息系统有限公司 | A kind of portable passive Radar Electromagnetic Environment test device |
| CN110018445A (en) * | 2019-03-29 | 2019-07-16 | 南京理工大学 | A kind of active and passive electromagnetic environment cognitive method combined |
| CN110703213A (en) * | 2019-10-09 | 2020-01-17 | 中国舰船研究设计中心 | Radar interference environment equivalent physical simulation method and device |
| CN116449114A (en) * | 2023-03-21 | 2023-07-18 | 中国民用航空飞行学院 | Unmanned aerial vehicle airborne electromagnetic environment real-time sensing system |
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