CN1661389A - Kneed tuning of antennae in echo chamber, transmitting technique and equipment in symmetry module - Google Patents
Kneed tuning of antennae in echo chamber, transmitting technique and equipment in symmetry module Download PDFInfo
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- CN1661389A CN1661389A CN 200510011246 CN200510011246A CN1661389A CN 1661389 A CN1661389 A CN 1661389A CN 200510011246 CN200510011246 CN 200510011246 CN 200510011246 A CN200510011246 A CN 200510011246A CN 1661389 A CN1661389 A CN 1661389A
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Abstract
The present invention relates to a reverberation room antenna stirring tuning and symmetric mode transmitting technique and its equipment. Said equipment mainly is formed from shielding cabinet-shaped cavity body, transmitting system, receiving system, antenna control system and main control system, and the shielding cabinet-shaped cavity body mainly is composed of shielding door, ventilation waveguide window, filter and interface board. Besides, said invention also provides the antenna control system and concrete position and polarization direction arrangement of said transmitting antenna in the reverberation room. Said invented technique can greatly improve low-frequency electromagnetic field uniformity in the reverberation room.
Description
Affiliated technical field
The present invention relates to a kind of reverberation chamber antenna and stir tuning and symmetric mode lift-off technology and device.
Background technology
The imagination of reverberation chamber electromagnetic compatibility test has just been proposed as far back as the nineteen sixty-eight people.Constantly the someone carries out the theoretical research and the experiment of this respect since then, recent years particularly, be doubled and redoubled about the reverberation chamber research paper, reverberation chamber electromagnetism measuring technology is quite ripe, on this basis, International Electrotechnical Commission has put into effect reverberation chamber basic standard " Electromagnetic ompatibility (EMC)-Part4-21:Testing and measurement techniques-Reverberation ChamberTest Methods " and has indicated that reverberation chamber moves towards practical from research.Up to now, reverberation chamber mainly is divided three classes, be respectively that mechanical raking/tuning reverberation chamber, frequency stir reverberation chamber and reverberation chamber is stirred in the source, comparatively Cheng Shu method is to make the interior electromagnetic field of reverberation chamber reach even with mechanical raking/tuning mode, some main research articles of reverberation chamber and standard are all about mould stirring/tuning reverberation chamber, deliver about the article of source stirring and frequency stirring reverberation chamber though abroad also have on a small quantity, back two kinds of reverberation chambers are not by a long sight from practicality.Frequency stirs reverberation chamber and equally is not suitable for few mould state with mechanical raking.Have the human computing machine that its built-in field has been carried out mathematical simulation though reverberation chamber is stirred in the source, only under the multimode state (600MHz), no one recognize that the source is stirred in the meaning that evenly stirs under few mould condition.But this normally reverberation chamber be operated in the mould state and could realize that therefore, the reverberation chamber frequency of operation can not be too low.Also have a small amount of article frequency of touching upon to mix the source and stir reverberation chamber, their discussion also all is to be limited in high band, does not see the theory of testing and the method for relevant reverberation chamber low frequency end so far yet.Though the electromagnetic theory research of reverberation chamber was carried out for two more than ten years abroad, there is not substantial progress all the time, only only limit in the estimation of modulus.This invention has reanalysed electromagnetic mode in the resonator cavity in theory, illustrated EMC reverberation chamber electromagnetism working mechanism, and undertaken EMC reverberation chamber electromagnetism operating mode on the basis of systematically classification by mode, understand the homogeneity that under one dimension bimodulus condition, adopts symmetric mode and anti symmetric mode emission can the improvement effectively electromagnetic field in the reverberation chamber from mathematics Shanghai Stock Exchange, the possibility that reduces the reverberation chamber lowest usable frequency has been described.
Now the reverberation chamber that generally uses is a mechanical agitation type, and it only is applicable to multimode or crosses under the mould condition, just under the high frequency condition.Reverberation chamber also can be carried out the work at the frequency low side, must solve two problems: the one, and stirrer efficiency, the 2nd, can stir under few mould condition.Because under the low frequency state, operation wavelength and reverberation chamber dimension are comparable, and be also just comparable with stirrer.Because electromagnetic diffraction, the efficient of mechanical stirrer is very low, the mould that can not change electromagnetic field in the reverberation chamber effectively distributes, and reverberation chamber is stirred in the source all is resolved the problem of these two aspects, so stir in the source, and reverberation chamber is suitable especially to be operated under the few mould state of low frequency.
Summary of the invention
In order to overcome the higher deficiency of existing technology reverberation chamber lowest usable frequency, the invention provides a kind of reverberation chamber antenna and stir tuning and symmetric mode lift-off technology and device, reanalysed electromagnetic mode in the resonator cavity in theory, illustrated EMC reverberation chamber electromagnetism working mechanism, and undertaken EMC reverberation chamber electromagnetism operating mode on the basis of systematically classification by mode, understand the homogeneity that under one dimension bimodulus condition, adopts symmetric mode and anti symmetric mode emission can the improvement effectively electromagnetic field in the reverberation chamber from mathematics Shanghai Stock Exchange, the possibility that reduces the reverberation chamber lowest usable frequency has been described.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of reverberation chamber antenna stirs tuning and the symmetric mode emitter mainly is made of shielding rectangular cavities, emission coefficient, receiving system, antenna control system and master control system, and the shielding rectangular cavities mainly is made up of shield door, ventilation waveguide window, wave filter, interface board etc.; Emission coefficient, form by signal source, power amplifier, emitting antenna etc.; Receiving system then is made up of field intensity probe, receiving antenna, milivoltmeter, receiver; Antenna control system is mainly used to control the running route of emitting antenna and launch time in the antenna sets and firing order; Master control system is used for controlling the flow process of whole test.All the electromagnetic compatibility test system with traditional is the same except that antenna control system in these several systems.Be characterised in that: antenna control system be to design emitting antenna antenna particular location and polarised direction emission each time of controlling emitting antenna in reverberation chamber when at every turn launching in advance successively according to symmetric mode emission and anti symmetric mode emission principle, add up uniform electric magnetic field when emitting antenna just can produce through the Electromagnetic Launching of one-period like this in reverberation chamber.
It is to adopt orientation or the alternately emission of several antenna that changes emitting antenna that reverberation chamber is stirred in the source, produce the statistics uniform electric magnetic field, so just there is not the electromagnetic diffraction problems that exists because size is little, also just can solves stirrer stirring efficiency problem under the low frequency of operation situation well.According to research, for arbitrary fixed frequency, as long as emitting antenna is placed on an appropriate location, just can finish the emission of symmetric mode and anti symmetric mode on request, even when frequency is hanged down, also can realize even stirring.
The invention has the beneficial effects as follows utilize that symmetric mode and anti symmetric mode emission principle adopt that the source stirring technique just can be very big improve the interior low frequency electromagnetic field uniformity of reverberation chamber.The whole homogeneity of electromagnetic field in reverberation chamber when existing mechanical stirring reverberation chamber and frequency stirring reverberation chamber can not improve low frequency, behind the stirring technique of employing source, usually the reverberation chamber of room-size just can be finished the radiation emission test of the EMC of full frequency band, under few mould state, can the reverberation chamber electromagnetic field realize even stirring, verified under few mould state, adopt symmetric mode and anti symmetric mode emission principle, just can produce than uniform electric magnetic field under the low frequency condition.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a low frequency electromagnetic field pattern in the reverberation chamber of the present invention.
Fig. 2 does not adopt low frequency electromagnetic field pattern in the reverberation chamber of the present invention.
Fig. 3 is that reverberation chamber electromagnetic compatibility test arrangenent diagram is stirred in the source.
Embodiment
A kind of reverberation chamber antenna stirs tuning and symmetric mode lift-off technology, adopt the orientation or the alternately emission of at least 3 slave antennas that change emitting antenna, produce the statistics uniform electric magnetic field, so just there is not the electromagnetic diffraction problems that exists because size is little, also just can solves stirrer stirring efficiency problem under the low frequency of operation situation well.According to research, for arbitrary fixed frequency, as long as emitting antenna is placed on an appropriate location, just can finish the emission of symmetric mode and anti symmetric mode on request, even when frequency is hanged down, also can realize even stirring.As shown in Figure 3, in the reverberation chamber of a room-size, place three secondary or at least 3 slave antennas 1,2,3, antenna 1,2,3 is aimed at the different corners (directly not aiming at test zone) of reverberation chamber, launch in turn by the switch control antenna, its calibration test method step is as follows:
Step 1:, design the direction and the position of each emitting antenna in the transmission antenna group in advance according to the principle of Theory of Electromagnetic Field and generation symmetry and antisymmetry emission to a certain fixation measuring frequency;
Step 2: keep carrying out Electromagnetic Launching successively in turn under the emissive power permanence condition;
Step 3: carry out the calibration and the test of EMC reverberation chamber according to the method for existing standard (as IEC61000-4-21);
Step 4: change next Frequency point and repeat above-mentioned steps 1-3;
Step 5: the position of adjusting emitting antenna.
It is as follows that method of adjustment is carried out in the position of emitting antenna, the position difference of different frequency antennas, and the time of the each emission of emitting antenna is by the response time decision of equipment under test and monitoring equipment, and should be more than two sesquialters greater than the reverberation chamber time constant.Above method can be used for radiation emission test equally, repeats no more here.For not satisfying the field uniformity requirement, can increase antenna amount or mechanical stirrer with till reaching requirement.For high-power emission, the switch among Fig. 3 is placed on before the power amplifier, controls power amplifier output respectively, and each power amplifier output connects different antennas.Fig. 1 and Fig. 2 are under the bimodulus condition that frequency of operation is lower when utilizing the source of symmetric mode emission to stir reverberation chamber and this technology useless, the comparison diagram that electromagnetic field distributes in the reverberation chamber.Find out obviously among the figure that electromagnetic field obtains very big improvement when having used this technology.Fig. 1 and Fig. 2 relatively divert the homogeneity of finding out that clearly electromagnetic field distributes in the reverberation chamber when adopting the present invention to improve low frequency.
Claims (5)
1. a reverberation chamber antenna stirs tuning and symmetric mode lift-off technology, it is characterized in that: adopt the orientation or the alternately emission of at least 3 slave antennas that change emitting antenna, produce the statistics uniform electric magnetic field.
2. a kind of reverberation chamber antenna according to claim 1 stirs tuning and symmetric mode lift-off technology, it is characterized in that: particular location and the polarised direction each time emission of controlling emitting antenna of antenna in reverberation chamber when designing emitting antenna in advance successively and launch at every turn according to symmetric mode emission and anti symmetric mode emission principle.
3. a kind of reverberation chamber antenna according to claim 1 and 2 stirs tuning and symmetric mode lift-off technology, it is characterized in that: the different corners of antenna alignment reverberation chamber, to launch in turn by the switch control antenna, and its calibration test method step is as follows:
Step 1:, design the direction and the position of each emitting antenna in the transmission antenna group in advance according to the principle of Theory of Electromagnetic Field and generation symmetry and antisymmetry emission to a certain fixation measuring frequency;
Step 2: keep carrying out Electromagnetic Launching successively in turn under the emissive power permanence condition;
Step 3: carry out the calibration and the test of EMC reverberation chamber according to the method for existing standard;
Step 4: change next Frequency point and repeat above-mentioned steps 1-3;
Step 5: the position of adjusting emitting antenna.
4. a reverberation chamber antenna stirs tuning and symmetric mode lift-off technology device, be made of shielding rectangular cavities, emission coefficient, reception receiving system, antenna control system and master control system, the shielding rectangular cavities mainly is made up of shield door, ventilation waveguide window, wave filter, interface board etc.; Emission coefficient, form by signal source, power amplifier, emitting antenna etc.; Receiving system then is made up of field intensity probe, receiving antenna, milivoltmeter, receiver; Master control system is used for controlling the flow process of whole test, it is characterized in that: running route and the launch time in the antenna sets and the firing order of antenna control system control emitting antenna; Antenna control system be to design emitting antenna antenna particular location and polarised direction emission each time of controlling emitting antenna in reverberation chamber when at every turn launching in advance successively according to symmetric mode emission and anti symmetric mode emission principle.
5. a kind of reverberation chamber antenna according to claim 4 stirs tuning and symmetric mode lift-off technology device, and it is characterized in that: switch is placed on before the power amplifier, controls power amplifier output respectively, and each power amplifier output connects different antennas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510011246XA CN100492048C (en) | 2005-01-24 | 2005-01-24 | Method and device for tuning for antennae in echo chamber and symmetrical module emission |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB200510011246XA CN100492048C (en) | 2005-01-24 | 2005-01-24 | Method and device for tuning for antennae in echo chamber and symmetrical module emission |
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| CN1661389A true CN1661389A (en) | 2005-08-31 |
| CN100492048C CN100492048C (en) | 2009-05-27 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101948748A (en) * | 2010-09-07 | 2011-01-19 | 工业和信息化部通信计量中心 | Experimental facility for bio-electromagnetic irradiation |
| CN103439536A (en) * | 2013-08-29 | 2013-12-11 | 陕西海泰电子有限责任公司 | Stirring device for electromagnetic shielding shell shielding effectiveness test |
| CN103558422A (en) * | 2013-10-31 | 2014-02-05 | 陕西海泰电子有限责任公司 | Mixing stirring device of mechanical stirring and source stirring of electromagnetic reverberation chamber and method |
| CN103743959A (en) * | 2014-01-24 | 2014-04-23 | 中国人民解放军军械工程学院 | Method for testing shielding effectiveness of irregular structure cavity in reverberation chamber based on frequency stirring technology |
| CN105866743A (en) * | 2015-12-28 | 2016-08-17 | 中国人民解放军军械工程学院 | Radar clutter frequency spectrum characteristic simulation system based on reverberation chamber and method thereof |
| CN106597340A (en) * | 2016-12-09 | 2017-04-26 | 北京无线电计量测试研究所 | Electromagnetic field sensor calibration system based on reverberation room and method thereof |
| CN108061836A (en) * | 2017-12-26 | 2018-05-22 | 北京中科国技信息系统有限公司 | Stir electromagnetism reverberation unit and its stirring means in source |
| CN108318758A (en) * | 2018-01-23 | 2018-07-24 | 南京航空航天大学 | Super surface reverberation chamber |
| CN108680906A (en) * | 2018-05-02 | 2018-10-19 | 深圳市华讯方舟雷达技术装备有限公司 | A kind of pulse radar automatic frequency tuning peak dot searching method |
| CN111337786A (en) * | 2020-04-24 | 2020-06-26 | 中国人民解放军63892部队 | Design method of line stirrer for improving field uniformity of reverberation chamber |
-
2005
- 2005-01-24 CN CNB200510011246XA patent/CN100492048C/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101948748A (en) * | 2010-09-07 | 2011-01-19 | 工业和信息化部通信计量中心 | Experimental facility for bio-electromagnetic irradiation |
| CN103439536B (en) * | 2013-08-29 | 2016-12-28 | 陕西海泰电子有限责任公司 | A kind of agitating device for the test of electromagnetic shielding shell shield effectiveness |
| CN103439536A (en) * | 2013-08-29 | 2013-12-11 | 陕西海泰电子有限责任公司 | Stirring device for electromagnetic shielding shell shielding effectiveness test |
| CN103558422A (en) * | 2013-10-31 | 2014-02-05 | 陕西海泰电子有限责任公司 | Mixing stirring device of mechanical stirring and source stirring of electromagnetic reverberation chamber and method |
| CN103743959A (en) * | 2014-01-24 | 2014-04-23 | 中国人民解放军军械工程学院 | Method for testing shielding effectiveness of irregular structure cavity in reverberation chamber based on frequency stirring technology |
| CN103743959B (en) * | 2014-01-24 | 2015-12-30 | 中国人民解放军军械工程学院 | A kind of method based on irregular structure cavity shield effectiveness in the test reverberation chamber of frequency stirring technique |
| CN105866743A (en) * | 2015-12-28 | 2016-08-17 | 中国人民解放军军械工程学院 | Radar clutter frequency spectrum characteristic simulation system based on reverberation chamber and method thereof |
| CN105866743B (en) * | 2015-12-28 | 2018-08-03 | 中国人民解放军军械工程学院 | Radar clutter spectral characteristic simulation system based on reverberation chamber and method |
| CN106597340A (en) * | 2016-12-09 | 2017-04-26 | 北京无线电计量测试研究所 | Electromagnetic field sensor calibration system based on reverberation room and method thereof |
| CN106597340B (en) * | 2016-12-09 | 2019-05-10 | 北京无线电计量测试研究所 | A kind of emf sensor calibration system and method based on reverberation chamber |
| CN108061836A (en) * | 2017-12-26 | 2018-05-22 | 北京中科国技信息系统有限公司 | Stir electromagnetism reverberation unit and its stirring means in source |
| CN108318758A (en) * | 2018-01-23 | 2018-07-24 | 南京航空航天大学 | Super surface reverberation chamber |
| CN108680906A (en) * | 2018-05-02 | 2018-10-19 | 深圳市华讯方舟雷达技术装备有限公司 | A kind of pulse radar automatic frequency tuning peak dot searching method |
| CN111337786A (en) * | 2020-04-24 | 2020-06-26 | 中国人民解放军63892部队 | Design method of line stirrer for improving field uniformity of reverberation chamber |
| CN111337786B (en) * | 2020-04-24 | 2023-02-24 | 中国人民解放军63892部队 | Design method of line stirrer for improving field uniformity of reverberation chamber |
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| CN100492048C (en) | 2009-05-27 |
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