CN103983937A - Signal detection system applied to anechoic chamber - Google Patents
Signal detection system applied to anechoic chamber Download PDFInfo
- Publication number
- CN103983937A CN103983937A CN201410251077.6A CN201410251077A CN103983937A CN 103983937 A CN103983937 A CN 103983937A CN 201410251077 A CN201410251077 A CN 201410251077A CN 103983937 A CN103983937 A CN 103983937A
- Authority
- CN
- China
- Prior art keywords
- signal
- anechoic chamber
- detection system
- electromagnetic wave
- pectination
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention discloses a signal detection system applied to an anechoic chamber. The signal detection system is characterized by comprising a pre-amplifier, a signal processing device, a comb-shaped signal generator for generating electromagnetic wave signals, a transmitting antenna for transmitting electromagnetic wave signals, and a receiving antenna for receiving the electromagnetic wave signals, wherein the comb-shaped signal generator is connected with the transmitting antenna; the receiving antenna is connected with the signal processing device through the pre-amplifier; the pre-amplifier is used for transmitting the electromagnetic wave signals to the signal processing device. According to the signal detection system, the comb-shaped signal generator generates electromagnetic wave signals by being connected with the transmitting antenna, so that signals can be transmitted continuously in a full band, and the signal amplitude of each frequency point is fixed; the comb-shaped signal generator does not need to be connected with the signal processing device, so that signal attenuation can be reduced, and the accuracy of signal testing is increased.
Description
Technical field
The present invention relates to signal measurement technique field, particularly relate to a kind of signal detection system that is applied to anechoic chamber.
Background technology
Anechoic chamber, is current the most widely used electromagnetic compatibility test place, and in electromagnetic compatibility test, the parameter of anechoic chamber,, as voltage standing wave ratio (VSWR) directly affects the reliability of test data.The at present voltage standing wave ratio (VSWR) detection method of anechoic chamber,, conventionally use one can synchronous control signal transmitting and the network analyzer of signal reception.The end coaxial cable that transmits connects with emitting antenna, and receiving antenna is connected to prime amplifier, then with coaxial cable, prime amplifier is received to the receiving end of network analyzer.
But because transmitter-receiver device is all in outside, darkroom, the length of coaxial cable is conventionally longer, general more than 15 meters, long coaxial cable signal attenuation is very large, can reduce test accuracy.
Summary of the invention
Based on this, be necessary the detection method for the voltage standing wave ratio (VSWR) of above-mentioned anechoic chamber,, signal attenuation is very large, can reduce the problem of test accuracy, and a kind of signal detection system that is applied to anechoic chamber, is provided.
A kind of signal detection system that is applied to anechoic chamber,, comprise prime amplifier, signal processing apparatus, for generating the pectination signal generator of electromagnetic wave signal, for sending the emitting antenna of described electromagnetic wave signal and for receiving the receiving antenna of described electromagnetic wave signal, described pectination signal generator is connected with described emitting antenna, described receiving antenna is connected with described signal processing apparatus by described prime amplifier, and described prime amplifier is transferred to described signal processing apparatus for the electromagnetic wave signal that described receiving antenna is received.
The above-mentioned signal detection system that is applied to anechoic chamber,, generates electromagnetic wave signal by be connected pectination signal generator with emitting antenna, can full frequency band simultaneously constant transmitted signal, and each frequency signal amplitude is fixed.Without frequency and the amplitude of adjusting pectination signal generator, can save the test duration, and then reduce testing cost.In addition without pectination signal generator is connected with signal processing apparatus, can reduce signal attenuation, and then improve the accuracy of signal testing.
Brief description of the drawings
Fig. 1 is the structural representation that the present invention is applied to signal detection system first embodiment of anechoic chamber;
Fig. 2 is the structural representation that the present invention is applied to signal detection system second embodiment of anechoic chamber;
Fig. 3 is the testing standard schematic diagram of the present invention's signal detection system of being applied to anechoic chamber.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Refer to Fig. 1, Fig. 1 is the structural representation of signal detection system the first embodiment that is applied to anechoic chamber, of the present invention.
Described in present embodiment, be applied to the signal detection system of anechoic chamber, can comprise prime amplifier 200, signal processing apparatus 100, for generating the pectination signal generator 400 of electromagnetic wave signal, for sending the emitting antenna 500 of described electromagnetic wave signal and for receiving the receiving antenna 300 of described electromagnetic wave signal, pectination signal generator 400 is connected with emitting antenna 500, receiving antenna 300 is connected with signal processing apparatus 100 by prime amplifier 200, prime amplifier 200 is transferred to signal processing apparatus 100 for the electromagnetic wave signal that receiving antenna 300 is received.
The signal detection system that is applied to anechoic chamber, described in present embodiment, generates electromagnetic wave signal by be connected pectination signal generator with emitting antenna, can full frequency band simultaneously constant transmitted signal, and each frequency signal amplitude is fixed.Without frequency and the amplitude of adjusting pectination signal generator, can save the test duration, and then reduce testing cost.In addition without pectination signal generator is connected with signal processing apparatus, can reduce signal attenuation, and then improve the accuracy of signal testing.
Wherein, for anechoic chamber,, can be an electromagnetic compatibility test space used, described space is through six shields of shielding design, is coated with electromagnetic wave absorption material therein, is used for completely cutting off extraneous electromagnetic wave.Construct one without electromagnetic environment.
For pectination signal generator 400 (comb-shaped signal source), the continuous equally spaced signal of transmitting that can be continual and steady, due to the signal of its transmitting uniformly-spaced, pectination signal generator 400 is connected with emitting antenna 500, can launch a series of uniformly-spaced signal.
Preferably, pectination signal generator 400, emitting antenna 500 and receiving antenna 300 are arranged in anechoic chamber.Can test anechoic chamber, place standing-wave ratio (SWR), anechoic chamber, normalization decay etc.
Preferably, pectination signal generator 400 can comprise the pectination signal generator that generation signal frequency is 1GHz to 18GHz, can generate anechoic chamber, place standing-wave ratio (SWR) and test required electromagnetic wave signal.
Preferably, pectination signal generator 400 can comprise that generating signal frequency is the pectination signal generator that comprises 18MHz to 30GHz.Can generate the required electromagnetic wave signal of anechoic chamber, normalization attenuation test.
In one embodiment, the pectination signal generator 400 being arranged in anechoic chamber, is connected with emitting antenna 500 by coaxial cable.Pectination signal generator can be placed on the raised floor of anechoic chamber.The length of described coaxial cable is less than or equal to 3 meters further.
For signal processing apparatus 100, can comprise frequency spectrograph, receiver or network analyzer etc.
Refer to Fig. 2, Fig. 2 is the structural representation of signal detection system the second embodiment that is applied to anechoic chamber, of the present invention.
The signal detection system that is applied to anechoic chamber, described in present embodiment is with the difference of the first embodiment: pectination signal generator 400 comprises the mu balanced circuit 420, crystal oscillating circuit 430, frequency division selection circuit 440, frequency division shaping circuit 450, step shaping circuit 460, balanced output circuit 470 and the attenuator 480 that are connected successively.
Present embodiment, generates all stable electromagnetic wave signals of frequency and amplitude, can greatly improve the degree of accuracy of signal testing.
Preferably, pectination signal generator 400 also can comprise the supply module 410 (being made up of internal battery) and the output terminal that are connected with mu balanced circuit.
Preferably, the fixed frequency signal that crystal oscillating circuit 430 produces by step shaping circuit 460, produces very precipitous square-wave signal, has passed through the higher harmonic components that Fourier transform can show fundamental signal on frequency spectrum.As the square-wave signal with 50MHz by radiation after, what on spectrum curve, just can produce is the comb spectrum signal taking 50MHz as frequency interval.
The following stated is that the signal detection system that is applied to anechoic chamber, of the present invention is applied in the test of anechoic chamber, place standing-wave ratio (SWR).
In the time carrying out the standing-wave ratio (SWR) test of anechoic chamber, place, CISPR16-1-4 standard (CCIR's standard, INTERNATIONAL STANDARD) is preferably installed and tests.As shown in Figure 3, in the process of test, each position in CISPR16-1-4 standard-required test anechoic chamber, (to test altogether anechoic chamber, before, in, left and right, at least 4 positions altogether) position near the ratio of each magnitude of voltage of 6 points (F1aF6, C1aC6, L1aL6, R1aR6), require maximum to be no more than 6dB.In the time measuring, make signal stabilization, use the signal of same amplitude to launch, changing behind 6 positions, receive signal and record the data of each frequency by receiver, and then compare the voltage standing wave ratio (VSWR) of 6 points that require on each position, need the amplitude of each control signal generator all in same size, also need to be after signal stabilization, receiver reads all data under the reception value record of each frequency, then contrast each position ratio of the data of 6 points around, requirement can not exceed 6dB.
Preferably, test process is as follows:
Step 101, a point of a locus annex in corresponding anechoic chamber, place, uses the pectination signal being arranged in anechoic chamber, to occur 400 and generates fixed frequency, and the signal of fixed amplitude is delivered to the emitting antenna 500 being arranged in anechoic chamber, and launches.
Step 102, receives by the receiving antenna 300 being arranged in anechoic chamber, the electromagnetic wave that emitting antenna 500 is launched, and is sent to prime amplifier 200.
Step 103, is sent to frequency spectrograph or receiver by prime amplifier 200 by described electromagnetic wave.
Step 104, receiver or frequency spectrograph are analyzed the electromagnetic wave that receiving antenna 300 receives, control receiving antenna lifting within the scope of 1 meter to 4 meters, read the maximum electromagnetic wave that receiving antenna 300 receives, and the storage of the current point (transmit direction of emitting antenna 400) of corresponding current locus.
Step 105, the next point of corresponding current locus, changes the transmit direction that receives emitting antenna 500, and repeating step 101, to step 104, if institute's step 101 of a little all having carried out of corresponding current locus is to 104, performs step 106.
Step 106, moves to the default locus of the next one in anechoic chamber, by receiving antenna 500 and pectination signal generator 400, and by a point of the corresponding current locus moving to of the transmit direction of emitting antenna 500, execution step 101 to 105.If step 101 has all been carried out to step 105 in all default locus in corresponding anechoic chamber,, perform step 107.
Step 107, the electromagnetic wave of locational 6 points of the each pre-set space storage of more corresponding anechoic chamber, field, obtains anechoic chamber, place voltage standing wave ratio (VSWR).
In above-mentioned test process, for step 101, use pectination signal generator 400 as emissive source, be connected with emitting antenna 500, pectination signal generator 400 is as a kind of stable signal generator that can launch multiple Frequency point signals simultaneously, transmit stable, can full frequency band simultaneously constant transmitted signal and each frequency signal amplitude fix.Can save a large amount of Measuring Time without adjusting signal frequency and amplitude, reduce the service time of anechoic chamber,, and then reduce the use cost of anechoic chamber.
In addition, the ground connection flat board that pectination signal generator 400 can be put into anechoic chamber, is underground, but not anechoic chamber, outside, without from dull and stereotyped ground of the overhead ground connection of anechoic chamber, volume underpass, bracing wire, lead-in wire, to outdoor, can be saved a large amount of system configuration time, further reduces the use cost of anechoic chamber.Can use very short coaxial cable to connect pectination signal generator 400 and emitting antenna 500.The length of coaxial cable can be less than 3 meters.Can shorten greatly the distance of signal generator and emitting antenna, reduce coaxial cable signal attenuation, improve measuring accuracy.
For step 104, use frequency spectrograph or receiver to carry out data analysis, the equipment of the low and electromagnetic compatibility laboratory indispensability of the price of frequency spectrograph and receiver, is convenient to test system building.Can reduce greatly comparatively dependences of the signal handling equipment of accurate and expensive instrument such as network analyzers.
In addition, frequency spectrograph or receiver do not need synchronous conditioning signal, and it is the basic function of frequency spectrograph and receiver that maximal value keeps, without keeping long-time adjustment frequency spectrograph or receiver that its maximal value is kept and reading out data.Can further reduce operation complexity and improve testing efficiency.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (9)
1. one kind is applied to the signal detection system of anechoic chamber,, it is characterized in that, comprise prime amplifier, signal processing apparatus, for generating the pectination signal generator of electromagnetic wave signal, for sending the emitting antenna of described electromagnetic wave signal and for receiving the receiving antenna of described electromagnetic wave signal, described pectination signal generator is connected with described emitting antenna, described receiving antenna is connected with described signal processing apparatus by described prime amplifier, and described prime amplifier is transferred to described signal processing apparatus for the electromagnetic wave signal that described receiving antenna is received.
2. the signal detection system that is applied to anechoic chamber, according to claim 1, is characterized in that, described signal processing device is set to frequency spectrograph.
3. the signal detection system that is applied to anechoic chamber, according to claim 1, is characterized in that, described signal processing device is set to receiver.
4. the signal detection system that is applied to anechoic chamber, according to claim 1, is characterized in that, described signal processing device is set to network analyzer.
5. the signal detection system that is applied to anechoic chamber, according to claim 1, it is characterized in that, described pectination signal generator comprises the mu balanced circuit, crystal oscillating circuit, frequency division selection circuit, frequency division shaping circuit, step shaping circuit, balanced output circuit and the attenuator that connect successively.
6. according to the signal detection system that is applied to anechoic chamber, described in any one in claim 1 to 5, it is characterized in that, described pectination signal generator, described emitting antenna and described receiving antenna are arranged in anechoic chamber.
7. the signal detection system that is applied to anechoic chamber, according to claim 6, is characterized in that, described pectination signal generator comprises the pectination signal generator that generation signal frequency is 18MHz to 30GHz.
8. the signal detection system that is applied to anechoic chamber, according to claim 6, is characterized in that, described pectination signal generator is connected with described emitting antenna by coaxial cable.
9. the signal detection system that is applied to anechoic chamber, according to claim 8, is characterized in that, the length of described coaxial cable is less than or equal to 3 meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410251077.6A CN103983937A (en) | 2014-06-06 | 2014-06-06 | Signal detection system applied to anechoic chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410251077.6A CN103983937A (en) | 2014-06-06 | 2014-06-06 | Signal detection system applied to anechoic chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103983937A true CN103983937A (en) | 2014-08-13 |
Family
ID=51275980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410251077.6A Pending CN103983937A (en) | 2014-06-06 | 2014-06-06 | Signal detection system applied to anechoic chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103983937A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107228987A (en) * | 2017-06-09 | 2017-10-03 | 中国电器科学研究院有限公司 | Electric automobile electromagnetic field tests special proficiency testing method and comb signal generator |
| CN109374967A (en) * | 2018-11-06 | 2019-02-22 | 华中科技大学 | A kind of detection method and system towards low reactance-resistance ratio SAW magnetoelectric transducer resonance frequency |
| CN113311258A (en) * | 2021-04-28 | 2021-08-27 | 深圳海关工业品检测技术中心 | Semi-anechoic chamber device and electromagnetic compatibility EMC (electro magnetic compatibility) test method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080074268A1 (en) * | 2006-09-25 | 2008-03-27 | Sensormatic Electronics Corporation | Method and system for standing wave detection for radio frequency identification marker readers |
| CN101561481A (en) * | 2009-01-24 | 2009-10-21 | 国网电力科学研究院 | Method for calibrating high-frequency electric field probe |
| CN201548628U (en) * | 2009-11-05 | 2010-08-11 | 上海波平航空科技有限公司 | Super-wide frequency-band durable microwave testing device |
| CN102116808A (en) * | 2010-12-30 | 2011-07-06 | 北京航空航天大学 | Test device for testing radiosensitivity of electric field and test method thereof |
| CN102818942A (en) * | 2012-08-24 | 2012-12-12 | 湖北航天技术研究院计量测试技术研究所 | Far-field parameter calibration device and calibration method for antenna |
| CN102944780A (en) * | 2012-11-06 | 2013-02-27 | 西安开容电子技术有限责任公司 | Testing method for shielding effectiveness of small-size shielding cavity |
| CN203299295U (en) * | 2013-05-27 | 2013-11-20 | 云南电力试验研究院（集团）有限公司电力研究院 | Radio frequency radiation immunity test device of electric energy acquisition system |
| WO2013185694A1 (en) * | 2012-07-27 | 2013-12-19 | 中兴通讯股份有限公司 | Method and device for testing radio frequency index and wireless index of active antenna system |
| CN103592478A (en) * | 2012-08-17 | 2014-02-19 | 鸿富锦精密工业（深圳）有限公司 | Radiation signal source |
-
2014
- 2014-06-06 CN CN201410251077.6A patent/CN103983937A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080074268A1 (en) * | 2006-09-25 | 2008-03-27 | Sensormatic Electronics Corporation | Method and system for standing wave detection for radio frequency identification marker readers |
| CN101561481A (en) * | 2009-01-24 | 2009-10-21 | 国网电力科学研究院 | Method for calibrating high-frequency electric field probe |
| CN201548628U (en) * | 2009-11-05 | 2010-08-11 | 上海波平航空科技有限公司 | Super-wide frequency-band durable microwave testing device |
| CN102116808A (en) * | 2010-12-30 | 2011-07-06 | 北京航空航天大学 | Test device for testing radiosensitivity of electric field and test method thereof |
| WO2013185694A1 (en) * | 2012-07-27 | 2013-12-19 | 中兴通讯股份有限公司 | Method and device for testing radio frequency index and wireless index of active antenna system |
| CN103592478A (en) * | 2012-08-17 | 2014-02-19 | 鸿富锦精密工业（深圳）有限公司 | Radiation signal source |
| CN102818942A (en) * | 2012-08-24 | 2012-12-12 | 湖北航天技术研究院计量测试技术研究所 | Far-field parameter calibration device and calibration method for antenna |
| CN102944780A (en) * | 2012-11-06 | 2013-02-27 | 西安开容电子技术有限责任公司 | Testing method for shielding effectiveness of small-size shielding cavity |
| CN203299295U (en) * | 2013-05-27 | 2013-11-20 | 云南电力试验研究院（集团）有限公司电力研究院 | Radio frequency radiation immunity test device of electric energy acquisition system |
Non-Patent Citations (3)
| Title |
|---|
| 何光平 等: "海峡两岸电磁兼容检测技术比对和分析", 《电视技术》 * |
| 张敬文: "使用梳状信号发生器测量机箱的屏蔽性能", 《安全与电磁兼容》 * |
| 黄培康 等: "《雷达目标特征信号》", 31 August 2009 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107228987A (en) * | 2017-06-09 | 2017-10-03 | 中国电器科学研究院有限公司 | Electric automobile electromagnetic field tests special proficiency testing method and comb signal generator |
| CN107228987B (en) * | 2017-06-09 | 2020-03-20 | 中国电器科学研究院股份有限公司 | Special capability verification method for electric vehicle electromagnetic field test and comb signal generator |
| CN109374967A (en) * | 2018-11-06 | 2019-02-22 | 华中科技大学 | A kind of detection method and system towards low reactance-resistance ratio SAW magnetoelectric transducer resonance frequency |
| CN109374967B (en) * | 2018-11-06 | 2020-05-19 | 华中科技大学 | Detection method and system for resonant frequency of low-Q-value SAW (surface Acoustic wave) magnetoelectric sensor |
| CN113311258A (en) * | 2021-04-28 | 2021-08-27 | 深圳海关工业品检测技术中心 | Semi-anechoic chamber device and electromagnetic compatibility EMC (electro magnetic compatibility) test method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101662078B (en) | Small shielding body electromagnetic shielding performance testing device, system and method therefor | |
| US9588212B1 (en) | Method of calibrating a measurement instrument for determining direction and distance to a source of passive intermodulation (PIM) | |
| CN102857310A (en) | Test method and device for wireless indexes of active antenna system | |
| CN102576044A (en) | Antenna characterisation in a waveguide | |
| CN102510313B (en) | Method for measuring communication port | |
| CN104849592B (en) | A kind of radio telescope wideband electromagnetic shield effectiveness detection system and detection method | |
| CN106468741A (en) | Radiation dispersion automatic test approach and device | |
| CN105703853A (en) | Broadband wireless channel attenuation test system used for transformer station site | |
| CN104391199A (en) | Method for testing shielding effectiveness of cable shielding layer | |
| CN103926483A (en) | Low-level sweep-frequency current testing system and testing method | |
| CN103336192A (en) | A low-level scanning current testing system for an aircraft whole body | |
| CN107124235A (en) | Passive intermodulation wireless test system under a kind of hot vacuum environment | |
| CN103983937A (en) | Signal detection system applied to anechoic chamber | |
| CN203894401U (en) | Signal detection system applied to electric wave darkroom | |
| CN105119664A (en) | Ultra-short wave radio terminal testing device | |
| CN102944797A (en) | Method for measuring coupling degree of antennas | |
| Minucci et al. | Measuring 5G electric fields strength with software defined radios | |
| CN204886982U (en) | Ultrashort wave radio station terminal test appearance | |
| CN109254207B (en) | Cable electromagnetic radiation analysis method and system | |
| CN203643531U (en) | Low-level frequency sweep current test system | |
| CN201536156U (en) | Electromagnetic shielding efficiency test device of small shielding body and radio-frequency antenna and dot frequency radiation source therein | |
| CN115032465A (en) | Radiation stray determination method, device and system | |
| CN104902508A (en) | Performance testing device and method for wireless terminal | |
| CN111505396B (en) | Short wave antenna gain test method and system | |
| Fenton et al. | Some aspects of benchmarking high frequency radiated emissions from wireline communications systems in the near and far fields |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140813 |