CN103105541B - Near field probe used for detecting electromagnetic interference radiation performance and application method thereof - Google Patents
Near field probe used for detecting electromagnetic interference radiation performance and application method thereof Download PDFInfo
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- CN103105541B CN103105541B CN201310036173.4A CN201310036173A CN103105541B CN 103105541 B CN103105541 B CN 103105541B CN 201310036173 A CN201310036173 A CN 201310036173A CN 103105541 B CN103105541 B CN 103105541B
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Abstract
The invention provides a near field probe used for detecting electromagnetic interference radiation performance. The near field probe used for detecting electromagnetic interference radiation performance comprises an electric field/magnetic field sensor, a photoelectricity conversion module and optical fibers, the electric field/magnetic field sensor comprises a three-hole optical fiber inserting core, three electric light/magnetic light crystals with different polarization directions, and a protective sleeve, three optical fibers drawn from the photoelectricity conversion module are respectively connected with the three electric light/magnetic light crystals with different polarization directions through the three-hole optical fiber inserting core, and the photoelectricity conversion module comprises a laser device, a 1*3 optical fiber beam splitter, three photoelectricity detectors, three optical fiber circulators, three optical polarization controllers and three radiofrequency output interfaces. The invention further provides an application method of the near field probe used for detecting electromagnetic interference radiation performance. The near field probe used for detecting electromagnetic interference radiation performance and the application method of the near field probe used for detecting electromagnetic interference radiation performance have the advantages that a circumscribed light source and the photoelectricity detector are unnecessary, a traditional radiofrequency output interface is used for outputting, measuring and application methods are compatible with an existing electromagnetic interference measuring system, and an electricity probe can be directly replaced to conduct electromagnetic interference test.
Description
Technical field
The present invention relates to a kind of near field probes for detecting electromagnetic interference (EMI) emissions performance and using method thereof, belonging to electromagnetic field near field measurement field.
Background technology
Electromagnetic interference is an important content of field of electromagnetic compatibility, along with the dominant frequency of electronic product is more and more higher, wiring density is increasing and the use of many level and Ground Split technology, circuit board also exists a large amount of radiation interference.For solving the electromagnetic interference problem of product from design source, just need the spatial distribution of the electromagnetic interference to circuit board to measure, this just needs the near-field measurement technique using electromagnetic field.Typical near-field probe adopts electrical method, existing defects in bandwidth, antijamming capability and invasive measurement etc. more.For overcoming the problems referred to above, there is the optical electromagnetic field measurement device of employing electric light/magneto-optic memory technique.A kind of electric field/magnetic field probe as described in patent CN201080029283.2, laser is utilized to enter into material and the refractive index of material corresponds to the intensity of electric field/magnetic field and the characteristic that changes, by can obtain the information in respective electric field/magnetic field to the measurement of optical signal.This technology is in expansion probe bandwidth, and improving measurement space resolution ratio aspect has huge advantage, has a extensive future.But the current problem of this technology is, probe front end sensing area complex structure, destabilizing factor is many, and measuring uncertainty is large; Need external laser instrument and photodetector, with the poor compatibility of existing near-field measurement system.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of near field probes for detecting electromagnetic interference (EMI) emissions performance and using method thereof, and this sonde configuration is simple, can be compatible with existing near-field measurement system, and Measurement sensibility is high.
The present invention adopts following technological means to solve the problems of the technologies described above: a kind of near field probes of the radiance for detecting electromagnetic interference, comprise electric field/magnetic field sensor, photoelectric conversion module, and optical fiber, described electric field/magnetic field sensor comprises three hole fiber stubs, electric light/the magneto-optical crystal of three different polarised directions, protecting pipe, photoelectric conversion module draw three optical fiber via three hole fiber stubs respectively polarised direction different from three electric light/magneto-optical crystal be connected, the optical fiber of electric light/magneto-optical crystal and introducing three hole fiber stubs is all fixed on three hole fiber stubs, three micropores of three hole fiber stubs are triangle space distribution,
Described photoelectric conversion module comprises laser instrument, 1 × 3 fiber optic splitter, three photodetectors, three optical fiber circulators, three optical fiber polarization controllers and three radio frequency output interface, the road laser that laser instrument exports by 1 × 3 fiber optic splitter is divided into first port that three tunnels enter three identical optical fiber circulators respectively, between laser instrument with 1 × 3 fiber optic splitter and 1 × 3 fiber optic splitter be all connected by optical fiber with between optical fiber circulator, second port of each optical fiber circulator is connected with electric field/magnetic field sensor respectively by optical fiber, 3rd port of each optical fiber circulator is connected with a photodetector respectively by an optical fiber polarization controller, each photodetector is connected with a radio frequency output interface.
Further, described electric field/magnetic field sensor also comprises protecting pipe, and three hole fiber stubs are fixed on protecting pipe inside.
Further, described laser instrument, 1 × 3 fiber optic splitter, optical fiber circulator, photodetector and optical fiber polarization controller are all fixed in metal screen case.
The present invention also provides a kind of as above for detecting the using method of the near field probes of the radiance of electromagnetic interference, comprise: first described laser instrument and photodetector are connected with power interface, operating voltage is provided by external dc voltage-stabilized power supply, laser instrument Output of laser is divided into three tunnels by 1 × 3 fiber optic splitter and enters electric field/magnetic field sensor respectively by three fiber optical circulators, then fiber optical circulator is returned, exported by the 3rd port of fiber optical circulator and enter photodetector through optical fiber polarization controller, optical signal is converted to the signal of telecommunication and is exported by radio frequency output interface by photodetector.
The invention has the advantages that: laser instrument is built in probe, and by photodetector in the inner conversion completing photosignal of probe, without the need to external light source and photodetector, exported by conventional radio frequency output interface, measure and occupation mode and existing electromagnetic interference measurement, EMI measurement system compatible, directly can replace electricity and pop one's head in and carry out Electromagnetic Interference Test.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structure for amplifying schematic diagram of electric field/magnetic field sensor of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, invention is described in detail:
Shown in Fig. 1 and Fig. 2, a kind of near field probes of the radiance for detecting electromagnetic interference, comprises electric field/magnetic field sensor 10, photoelectric conversion module 3, optical fiber 6.
Described electric field/magnetic field sensor 10 comprises electric light/magneto-optical crystal 12, the protecting pipe 13 of three hole fiber stubs, 11, three different polarised directions.Photoelectric conversion module 3 three optical fiber 6 of drawing are connected via the electric light/magneto-optical crystal 12 of three hole fiber stubs 11 polarised direction different from three respectively, the optical fiber 6 of electric light/magneto-optical crystal 12 and introducing three hole fiber stubs 11 is all fixed on three hole fiber stubs 11, and it is inner that three hole fiber stubs 11 are fixed on protecting pipe 13.
Described photoelectric conversion module 3 comprises laser instrument 2,1 × 3 fiber optic splitter 4, three photodetectors 7, three optical fiber circulators 8, three optical fiber polarization controllers 9 and three radio frequency output interface 5.The road laser that laser instrument 2 exports by 1 × 3 fiber optic splitter 4 is divided into first port that three tunnels enter three identical optical fiber circulators 8 respectively, between laser instrument 2 with 1 × 3 fiber optic splitter 4 and 1 × 3 fiber optic splitter 4 be all connected by optical fiber 6 with between optical fiber circulator 8, second port of each optical fiber circulator 8 is connected with electric field/magnetic field sensor 10 respectively by optical fiber 6.3rd port of each optical fiber circulator 8 is connected with a photodetector 7 respectively by an optical fiber polarization controller 9, and each photodetector 7 is connected with a radio frequency output interface 5.Therefore, each optical fiber circulator 8 corresponds to the different polarization components detection channels of electric field/magnetic field, three radio frequency output interface 5, three polarization components of corresponding electric field/magnetic field respectively.Described radio frequency output interface 5 uses traditional radio frequency output interface.
During use, described laser instrument 2 and photodetector 7 are connected with power interface 1, provide operating voltage by external dc voltage-stabilized power supply.Laser instrument 2 Output of laser is divided into three tunnels by 1 × 3 fiber optic splitter 4 and enters electric field/magnetic field sensor 10 respectively by three fiber optical circulators 8, then fiber optical circulator 8 is returned, exported by the 3rd port of fiber optical circulator 8 and enter photodetector 7 through optical fiber polarization controller 9, optical signal is converted to the signal of telecommunication and is exported by radio frequency output interface 5 by photodetector 7.
The opticses such as laser instrument 2,1 × 3 fiber optic splitter 4, optical fiber circulator 8, photodetector 7 and optical fiber polarization controller 9 are all fixed in metal screen case 20.
In use, the electric light/magneto-optical crystal 12 by three different polarised directions measures three polarization components of electric field/magnetic field to this near field probes simultaneously, also can monitor a polarization components separately through an electric light/magneto-optical crystal 12.
The inner integration laser 2 of this photoelectric conversion module 3, and by photodetector 7 in the inner conversion completing photosignal of probe, exported by conventional radio frequency output interface 5.Radio frequency output interface 5 is compatible with existing near-field measurement system, directly can replace typical near-field probe.
The foregoing is only the preferred embodiment of the invention; not in order to limit the invention; the any amendment done within all spirit in the invention and principle, equivalently to replace and improvement etc., within the protection domain that all should be included in the invention.
Claims (4)
1. one kind for detecting the near field probes of the radiance of electromagnetic interference, comprise electric field/magnetic field sensor, photoelectric conversion module, and optical fiber, it is characterized in that: described electric field/magnetic field sensor comprises three hole fiber stubs, electric light/the magneto-optical crystal of three different polarised directions, protecting pipe, photoelectric conversion module draw three optical fiber via three hole fiber stubs respectively polarised direction different from three electric light/magneto-optical crystal be connected, the optical fiber of electric light/magneto-optical crystal and introducing three hole fiber stubs is all fixed on three hole fiber stubs, three micropores of three hole fiber stubs are triangle space distribution,
Described photoelectric conversion module comprises laser instrument, 1 × 3 fiber optic splitter, three photodetectors, three optical fiber circulators, three optical fiber polarization controllers and three radio frequency output interface, the road laser that laser instrument exports by 1 × 3 fiber optic splitter is divided into first port that three tunnels enter three identical optical fiber circulators respectively, between laser instrument with 1 × 3 fiber optic splitter and 1 × 3 fiber optic splitter be all connected by optical fiber with between optical fiber circulator, second port of each optical fiber circulator is connected with electric field/magnetic field sensor respectively by optical fiber, 3rd port of each optical fiber circulator is connected with a photodetector respectively by an optical fiber polarization controller, each photodetector is connected with a radio frequency output interface.
2. the near field probes of a kind of radiance for detecting electromagnetic interference as claimed in claim 1, it is characterized in that: described electric field/magnetic field sensor also comprises protecting pipe, three hole fiber stubs are fixed on protecting pipe inside.
3. the near field probes of a kind of radiance for detecting electromagnetic interference as claimed in claim 1, is characterized in that: described laser instrument, 1 × 3 fiber optic splitter, optical fiber circulator, photodetector and optical fiber polarization controller are all fixed in metal screen case.
4. the using method of the near field probes of the radiance for detecting electromagnetic interference as described in claim 1 or 2 or 3, it is characterized in that: first described laser instrument and photodetector are connected with power interface, operating voltage is provided by external dc voltage-stabilized power supply, laser instrument Output of laser is divided into three tunnels by 1 × 3 fiber optic splitter and enters electric field/magnetic field sensor respectively by three fiber optical circulators, then fiber optical circulator is returned, exported by the 3rd port of fiber optical circulator and enter photodetector through optical fiber polarization controller, optical signal is converted to the signal of telecommunication and is exported by radio frequency output interface by photodetector.
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| CN105911531B (en) * | 2016-04-08 | 2018-04-03 | 中国电子科技集团公司第三十八研究所 | A kind of device for phased array antenna field calibration |
| DE202016104835U1 (en) * | 2016-09-01 | 2017-12-06 | Anita Silvia Zwerger-Schuster | Device for performing EMC test measurements |
| CN110927499B (en) * | 2019-12-10 | 2022-05-17 | 中国民航大学 | Radio frequency integrated circuit near field electromagnetic compatibility test equipment and test method thereof |
| CN112198374B (en) * | 2020-09-30 | 2021-10-22 | 武汉大学 | High-frequency high-precision space electric field measurement system and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101207881A (en) * | 2006-12-19 | 2008-06-25 | 中兴通讯股份有限公司 | Apparatus and method for testing mobile terminal near field radiation |
| CN101231319A (en) * | 2008-02-21 | 2008-07-30 | 中兴通讯股份有限公司 | Electromagnetic interference scanning device and method |
| CN101750546A (en) * | 2009-12-28 | 2010-06-23 | 北京航空航天大学 | Self-adaptive scanning device with electromagnetic compatibility for near-field test |
| CN101937012A (en) * | 2010-08-20 | 2011-01-05 | 中国西电电气股份有限公司 | Trinomial all-fiber current transformer |
| CN201965220U (en) * | 2011-03-04 | 2011-09-07 | 北京交通大学 | Space magnetic field detector |
| CN102472785A (en) * | 2009-06-29 | 2012-05-23 | 日本电气株式会社 | Probe for electric/magnetic field |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5163850B2 (en) * | 2007-03-05 | 2013-03-13 | 日本電気株式会社 | Electromagnetic field measuring device |
| JP5471341B2 (en) * | 2009-11-17 | 2014-04-16 | 日本電気株式会社 | Measuring device |
-
2013
- 2013-01-30 CN CN201310036173.4A patent/CN103105541B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101207881A (en) * | 2006-12-19 | 2008-06-25 | 中兴通讯股份有限公司 | Apparatus and method for testing mobile terminal near field radiation |
| CN101231319A (en) * | 2008-02-21 | 2008-07-30 | 中兴通讯股份有限公司 | Electromagnetic interference scanning device and method |
| CN102472785A (en) * | 2009-06-29 | 2012-05-23 | 日本电气株式会社 | Probe for electric/magnetic field |
| CN101750546A (en) * | 2009-12-28 | 2010-06-23 | 北京航空航天大学 | Self-adaptive scanning device with electromagnetic compatibility for near-field test |
| CN101937012A (en) * | 2010-08-20 | 2011-01-05 | 中国西电电气股份有限公司 | Trinomial all-fiber current transformer |
| CN201965220U (en) * | 2011-03-04 | 2011-09-07 | 北京交通大学 | Space magnetic field detector |
Non-Patent Citations (1)
| Title |
|---|
| 翟景升等.光纤技术在电压（电场）测量中的应用.《军械工程学院学报》.2000,第12卷第256-262页. * |
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