CN100412553C - Detector of Radar peak value field strength - Google Patents
Detector of Radar peak value field strength Download PDFInfo
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- CN100412553C CN100412553C CNB2005100196944A CN200510019694A CN100412553C CN 100412553 C CN100412553 C CN 100412553C CN B2005100196944 A CNB2005100196944 A CN B2005100196944A CN 200510019694 A CN200510019694 A CN 200510019694A CN 100412553 C CN100412553 C CN 100412553C
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Abstract
The present invention relates to a detector of radar peak value field strength for detecting radar radiation wave. The present invention can be used for detecting the peak field strength of radar antenna near field within the frequency range of 0.1GHz to 18GHz. The present invention comprises a microwave field strength probe, a microwave field strength meter main machine and a computer, wherein the microwave field strength probe comprises a micro antenna and a full shielding probe box; a microwave detector and an electro-optic change-over circuit are arranged in the full shielding probe box; the microwave field strength meter main machine is formed by connecting a photoelectric change-over circuit, a signal processing circuit and a virtual oscillograph; the microwave field strength meter main machine is conducted to the microwave field strength probe by optical fiber; the output end of the microwave field strength meter main machine is connected with the computer. The present invention can detect the peak value field strength and the average field strength of the radar near field, and can also detect the waveform of radar pulse. The optical fiber is used as a transmission medium, which makes the microwave field strength meter main machine and operators be far away from a detected radar site. Thus, the interference rejection of the present invention is enhanced, and testers are safe from the damage of electromagnetic radiation.
Description
Technical field
The present invention relates to a kind of microwave peak value field intensity proving installation that the radar emission ripple detects that is used for, belong to the emc testing field, can be used for the peak value field strength measurement in the radar antenna near field in 0.1GHz～18GHz frequency range.
Background technology
Radar is widely used as a kind of sniffer.The electromagnetic pulse intensity of radar antenna radiation alters a great deal in time, presents the characteristic of periodically abrupt release, and its pulsewidth is narrower, and dutycycle mostly is per mille, thereby the near field of radar antenna has pulse width, characteristics that peak value is high.
The detection mode of electromagnetic field intensity test instrumentation is quasi-peak value detection or mean value detection mostly both at home and abroad at present, can only be applicable to continuous wave test, can not be used for the test of high power pulse field intensity.If test with general field strength measurement instrument, two kinds of situations often appear: the one, and test instrumentation does not react the burst pulse field, and the 2nd, test instrumentation is easily burnt by high field intensity.Therefore, the near field that does not have suitable instrument energy measurement radar antenna for a long time.Yet along with high-tech fast development, high power pulse equipment is more and more, and the microwave peak value field intensity proving installation of development of practical is very necessary.
Summary of the invention
Technical matters to be solved by this invention is the deficiency that exists at above-mentioned existing measuring technology and a kind of peak value field intensity and average field-strength that can the instrumentation radar near field be provided, again the detector of Radar peak value field strength of energy measurement radar pulse waveform.
The present invention addresses the above problem the technical scheme that is proposed to be: include microwave field density probe, microwave field strength meter main frame and computing machine, described microwave field density probe comprises miniature antenna and full-shield probe cassette, be provided with microwave detector and electro-optical conversion circuit in the full-shield probe cassette, described microwave field strength meter main frame is connected by photoelectric switching circuit, signal processing circuit and virtual oscilloscope and forms, microwave field strength meter main frame and microwave field density probe are conducted by optical fiber, and the output terminal and the computing machine of microwave field strength meter main frame join; And set up high frequency attenuator in the full-shield probe cassette, high frequency attenuator is connected between miniature antenna and the microwave detector; Described virtual oscilloscope comprises high-speed sampling module, A/D modular converter and computing machine communication interface; Described miniature antenna is the monopole miniature antenna; Described electro-optical conversion circuit comprises the impedance inverter circuit that field effect transistor Q1, Technitron Q2 and peripheral circuit resistance R 1 thereof, R2, R3, R4, R5 form, Technitron Q3, Q4 and diode D1, D2, D3 and resistance R 6, R7, R15 form follower, laser instrument LD1 joins by R8, R9 and power supply, simultaneously by the emitter and collector cross-over connection mutually with Q4 of capacitor C 1, C2, C0.
The course of work of the present invention is: the microwave field density probe receives set of pulses modulated voltage signal in the radar antenna radiation field, this signal becomes pulse voltage signal behind microwave detector, convert pulse electrical signal to light signal by electro-optical conversion circuit again and export the microwave field strength meter main frame to.Photoelectric switching circuit converts the light signal that receives to electric signal in the microwave field strength meter main frame, by after the signal Processing electric signal being restored is original pulse voltage signal, again through high-speed sampling and A/D conversion, the input computing machine, carry out data acquisition by computing machine, can provide the equal field intensity of peak value field intensity peace of the radar near field of surveying after the conversion.
Beneficial effect of the present invention is: 1, the wave detector with tool peak detection function applies to the radar near field field strength measurement, peak value field intensity and average field-strength that can the instrumentation radar near field, the waveform of energy measurement radar modulating pulse again; Can be used for the peak value field strength measurement in the radar antenna near field in 0.1GHz～18GHz frequency range, range is 0.01W/cm
2～100W/cm
2, resolution is 1/200 of full scale.2, adopt optical fiber as transmission medium, just other device of tester and operating personnel are away from microwave field density probe and tested radar scene, and this has not only improved the antijamming capability of proving installation, and makes the tester avoid the injury of electromagnetic radiation.3, by virtual oscilloscope the high-speed sampling module is introduced test macro, realized the quick undistorted sampling of burst pulse and the data processing of microsecond level rising edge.
Description of drawings
Fig. 1 is the circuit structure block diagram of one embodiment of the invention.
Fig. 2 is the electro-optical conversion circuit schematic diagram in the one embodiment of the invention.
Fig. 3 is the circuit theory diagrams of photoelectric switching circuit, signal processing circuit in the one embodiment of the invention.
Embodiment
Further specify embodiments of the invention below in conjunction with accompanying drawing, form by microwave field density probe, microwave field strength meter main frame and three parts of computing machine.Described microwave field density probe comprises miniature antenna and full-shield probe cassette, and miniature antenna is the monopole miniature antenna, and is non-directional, adjusts the measurement range that its length can change test instrumentation; Be provided with high frequency attenuator, microwave detector and electro-optical conversion circuit in the full-shield probe cassette, high frequency attenuator is dismantled and assembled structure, when radar emission power when not being very high, can remove high frequency attenuator; The frequency of operation 100MHz-18GHz of microwave detector, maximal input 100mW.Described electro-optical conversion circuit comprises field effect transistor Q1, Technitron Q2 and peripheral circuit resistance R 1 thereof, R2, R3, R4, the impedance inverter circuit that R5 forms, Technitron Q3, Q4 and diode D1, D2, D3 and resistance R 6, R7, R15 forms follower, laser instrument LD1 passes through R8, R9 and power supply join, simultaneously by capacitor C 1, C2, the emitter and collector cross-over connection mutually of C0 and Q4, R8, R9 provides a bias current for laser instrument LD1, make LD1 be in a suitable duty, capacitor C 1, C2, C0 plays that stopping direct current is logical to be exchanged, and the modulating pulse voltage signal is added to becomes light signal output on the laser instrument.The output terminal of electro-optical conversion circuit joins by the input end of optical fiber and microwave field strength meter main frame, and the microwave field strength meter main frame comprises photoelectric switching circuit, signal processing circuit and virtual oscilloscope, and the front and back connection forms; Wherein photoelectric switching circuit is made of photoelectric conversion device (chip) U0; Signal processing circuit comprises that broadband operational amplifier U1 and peripheral circuit C3, C4, C5 and R10, R11 form strides the resistance amplifying circuit, the amplification circuit of electrical signal that broadband operational amplifier U2 and peripheral circuit C6 and R12, R13, R14 form, make the light signal that receives restore and be original pulse voltage signal, J1 exports virtual oscilloscope to by interface.Virtual oscilloscope comprises high-speed sampling module, A/D modular converter and computing machine communication interface.The output termination computer interface of virtual oscilloscope carries out data acquisition by computing machine, can provide the equal field intensity of peak value field intensity peace of the radar near field of surveying after the conversion.
The present invention can adopt WH5100 type virtual oscilloscope, and it has, and volume is little, sample rate is high, programming is easy to characteristics, Itself and computer linked up be easy to realize the pulse voltage sampling.
Claims (3)
1. detector of Radar peak value field strength, it is characterized in that including microwave field density probe, microwave field strength meter main frame and computing machine, described microwave field density probe comprises miniature antenna and full-shield probe cassette, be provided with microwave detector and electro-optical conversion circuit in the full-shield probe cassette, described microwave field strength meter main frame is connected by photoelectric switching circuit, signal processing circuit and virtual oscilloscope and forms, microwave field strength meter main frame and microwave field density probe are conducted by optical fiber, and the output terminal and the computing machine of microwave field strength meter main frame join; And set up high frequency attenuator in the full-shield probe cassette, high frequency attenuator is connected between miniature antenna and the microwave detector; Described virtual oscilloscope comprises high-speed sampling module, A/D modular converter and computing machine communication interface; Described miniature antenna is the monopole miniature antenna; Described electro-optical conversion circuit comprises the impedance inverter circuit that field effect transistor Q1, Technitron Q2 and peripheral circuit resistance R 1, R2, R3, R4, R5 form, Technitron Q3, Q4 and diode D1, D2, D3 and resistance R 6, R7, R15 form follower, laser instrument LD1 joins by resistance R 8, R9 and power supply, simultaneously by the emitter and collector cross-over connection mutually with Technitron Q4 of capacitor C 1, C2, C0.
2. by the described detector of Radar peak value field strength of claim 1, it is characterized in that described photoelectric switching circuit is made of photoelectric conversion device U0.
3. by claim 1 or 2 described detector of Radar peak value field strength, what it is characterized in that described signal processing circuit comprises that broadband operational amplifier U1 and capacitor C 3, C4, C5 and resistance R 10, R11 form strides the resistance amplifying circuit, the amplification circuit of electrical signal that broadband operational amplifier U2 and capacitor C 6 and resistance R 12, R13, R14 form, J1 exports virtual oscilloscope to by interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100196944A CN100412553C (en) | 2005-10-28 | 2005-10-28 | Detector of Radar peak value field strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100196944A CN100412553C (en) | 2005-10-28 | 2005-10-28 | Detector of Radar peak value field strength |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1749766A CN1749766A (en) | 2006-03-22 |
| CN100412553C true CN100412553C (en) | 2008-08-20 |
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| CNB2005100196944A Active CN100412553C (en) | 2005-10-28 | 2005-10-28 | Detector of Radar peak value field strength |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107703797A (en) * | 2017-09-25 | 2018-02-16 | 国网福建省电力有限公司 | Oil stream flow velocity disturbance electric field simulator and its emulation mode inside a kind of main transformer |
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| CN101207447B (en) * | 2006-12-19 | 2011-03-02 | 中兴通讯股份有限公司 | Method for testing mobile terminal radiating continuous disturbance indicators and system thereof |
| CN100501425C (en) * | 2007-01-08 | 2009-06-17 | 武汉大学 | Measuring Method of Pattern of High Frequency LFM Radar |
| CN102012798A (en) * | 2010-11-26 | 2011-04-13 | 中国航天科工集团第二研究院七○六所 | Photoelectric-isolating low-electromagnetic leakage display interface |
| CN102749511B (en) * | 2012-06-12 | 2015-08-12 | 大唐移动通信设备有限公司 | Distributed frequency spectrum analyser and apply the method that it carries out spectrum analysis |
| CN103197156A (en) * | 2013-03-20 | 2013-07-10 | 中国舰船研究设计中心 | Synchronous acquisition system and method for multi-channel electromagnetic field intensity |
| CN105759128B (en) * | 2016-02-25 | 2018-12-07 | 北京航空航天大学 | A kind of Broadband Detection method based on logarithm peak detection method |
| CN107390061A (en) * | 2017-07-28 | 2017-11-24 | 南京理工大学 | Using the test system of fiber optic communication electronic device false triggering under strong electromagnetic radiation |
| CN109188111B (en) * | 2018-11-13 | 2021-04-27 | 中国舰船研究设计中心 | Ultra-high field intensity, ultra-short pulse and narrow-band microwave radiation field measurement system and measurement method |
| CN115882939A (en) * | 2022-11-10 | 2023-03-31 | 国网河南省电力公司直流中心 | Optical circuit performance measuring device for converter valve of direct current converter station |
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2005
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|---|---|---|---|---|
| CN1128354A (en) * | 1994-06-17 | 1996-08-07 | 株式会社东金 | Electric field sensor capable of reliably measuring an electric field intensity of signal |
| CN1132967A (en) * | 1994-12-30 | 1996-10-09 | 日本电气株式会社 | Control apparatus and control method for attenuating radio signal |
| JPH1048275A (en) * | 1996-07-31 | 1998-02-20 | Toyota Central Res & Dev Lab Inc | Electromagnetic field strength measuring device |
| CN2631056Y (en) * | 2003-07-15 | 2004-08-04 | 武汉大学 | Monopole/orthogonal active antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107703797A (en) * | 2017-09-25 | 2018-02-16 | 国网福建省电力有限公司 | Oil stream flow velocity disturbance electric field simulator and its emulation mode inside a kind of main transformer |
| CN107703797B (en) * | 2017-09-25 | 2019-06-07 | 国网福建省电力有限公司 | Oil stream flow velocity disturbance electric field simulator and its emulation mode inside a kind of main transformer |
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| Publication number | Publication date |
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| CN1749766A (en) | 2006-03-22 |
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Assignee: Wuhan Ship Development & Design Institute Assignor: China Ship Research and Design Center Contract fulfillment period: 2009.9.1 to 2014.9.1 contract change Contract record no.: 2009420010071 Denomination of invention: Detector of Radar peak value field strength Granted publication date: 20080820 License type: Exclusive license Record date: 20091218 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.9.1 TO 2014.9.1; CHANGE OF CONTRACT Name of requester: WUHAN INSTITUTE OF SHIP DESIGN Effective date: 20091218 |