National Symposium on Electromagnetic Compatibility最新文献_第2页

EMC and the 20-meter band EMC和20米波段

National Symposium on Electromagnetic Compatibility Pub Date : 1989-05-23 DOI: 10.1109/NSEMC.1989.37188

C.L. Smith

引用次数: 0

Measuring the shielding effectiveness of superconductive composites 测量超导复合材料的屏蔽效能

National Symposium on Electromagnetic Compatibility Pub Date : 1989-05-23 DOI: 10.1109/NSEMC.1989.37213

T. Pieńkowski, D. Johnson, M. Lanagan, R. B. Poeppel, S. Danyluk, M. McGuire

引用次数: 2

Experiences in building an open area test site 有建立露天试验场的经验

National Symposium on Electromagnetic Compatibility Pub Date : 1989-05-23 DOI: 10.1109/NSEMC.1989.37171

F. Tarico

引用次数: 1

The effect of dipole coupled impedances on open field range calibration 偶极耦合阻抗对开场量程标定的影响

National Symposium on Electromagnetic Compatibility Pub Date : 1989-05-23 DOI: 10.1109/NSEMC.1989.37142

R. McConnell

引用次数: 6

An energy analysis of the EMP damped sinusoid 电磁脉冲阻尼正弦的能量分析

National Symposium on Electromagnetic Compatibility Pub Date : 1989-05-23 DOI: 10.1109/NSEMC.1989.37151

R. McConnell

引用次数: 2

Calibration of antenna factor at a ground screen field site using an automatic network analyzer 使用自动网络分析仪校正地面屏幕现场的天线系数

National Symposium on Electromagnetic Compatibility Pub Date : 1989-05-23 DOI: 10.1109/NSEMC.1989.37143

E. B. Larsen, R. L. Ehret, D. Camell, G. Koepke

{"title":"Calibration of antenna factor at a ground screen field site using an automatic network analyzer","authors":"E. B. Larsen, R. L. Ehret, D. Camell, G. Koepke","doi":"10.1109/NSEMC.1989.37143","DOIUrl":"https://doi.org/10.1109/NSEMC.1989.37143","url":null,"abstract":"Two approaches are described that permit automatic stepped-frequency data acquisition and rapid calculation of several antenna parameters. These parameters include antenna factor, intrinsic gain, realized gain, antenna input impedance, voltage standing wave ratio and site attenuation. The effects of antenna impedance on the meaning and accuracy of antenna measurements are emphasized throughout. The technique now used at the National Institute of Standards and Technology for calibrating the antenna factor at frequencies from 25 to 1000 MHz uses a standard open-circuit half-wave receiving dipole to measure the electric field strength. This approach is compared with a three-antenna method that uses an accurate automatic network analyzer with 120 dB dynamic range to measure insertion loss between the transmitting and receiving antennas. A field site having a 30*60 m ground screen, which acts as a good reflector, is used. Thus, the effects of ground reflection are calculated and compensated for. The new insertion loss technique permits faster measurements with greater repeatability and reduction in calibration uncertainty, especially at frequencies above 75 MHz.<<ETX>>","PeriodicalId":408694,"journal":{"name":"National Symposium on Electromagnetic Compatibility","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129365232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 16

Predicting the shielding effectiveness of rectangular apertures 预测矩形孔径的屏蔽效能

National Symposium on Electromagnetic Compatibility Pub Date : 1989-05-23 DOI: 10.1109/NSEMC.1989.37145

C. Vitek

引用次数: 5

Survey of conducted transients in the electrical system of a passenger automobile 乘用车电气系统传导暂态的调查

National Symposium on Electromagnetic Compatibility Pub Date : 1989-05-23 DOI: 10.1109/NSEMC.1989.37192

J. Alkalay, R. Ebrahimian, H. Kendall, M. Laskowski, A. Lee, D. Noderer

{"title":"Survey of conducted transients in the electrical system of a passenger automobile","authors":"J. Alkalay, R. Ebrahimian, H. Kendall, M. Laskowski, A. Lee, D. Noderer","doi":"10.1109/NSEMC.1989.37192","DOIUrl":"https://doi.org/10.1109/NSEMC.1989.37192","url":null,"abstract":"As part of an effort to develop automotive electromagnetic compatibility (EMC) test procedures for evaluating conducted emissions and conducted susceptibility at the component level, an extensive survey of the electrical transients was conducted at various locations within the electrical/electronic system of a late-model automobile. Simultaneous measurements were made at selected potential sources of transients and at power-line inputs of potentially susceptible electronic modules. The recorded signals were then analyzed to arrive at a reduced set of fundamental types of waveforms. The implications of the results reported here on component EMC test procedures developed are discussed. It is concluded that there are three main types of conducted transient waveforms: glow discharge, inductive kick, and damped sinusoid. The glow-discharge type had the highest voltage amplitude and shortest risetime; the inductive-kick type had lower amplitude, much slower rise, but very long pulse width; the damped-sinusoid type had the lowest amplitude. These transients were highly attenuated as they reached sensitive electronic receivers. The survey results, although based only on one car, clearly indicated that the glow-discharge transients are the most severe, followed by the inductive kicks.<<ETX>>","PeriodicalId":408694,"journal":{"name":"National Symposium on Electromagnetic Compatibility","volume":"566 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133772600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

A method for examining failed (shorted) transient voltage suppressors to determine the destructive pulse characteristics 一种检测失效(短路)瞬态电压抑制器以确定破坏性脉冲特性的方法

National Symposium on Electromagnetic Compatibility Pub Date : 1989-05-23 DOI: 10.1109/NSEMC.1989.37163

A. D. Smith, J.R. Lightsey, R. W. Hudson

引用次数: 1

An SHF/EHF field-to-wire coupling model enhancement to IEMCAP 对IEMCAP的SHF/EHF场线耦合模型的改进

National Symposium on Electromagnetic Compatibility Pub Date : 1989-05-23 DOI: 10.1109/NSEMC.1989.37167

G. Brock, A. McMahon, J. Salazar, P. Griffin, G. Capraro, A. Drozd, A. Pesta

{"title":"An SHF/EHF field-to-wire coupling model enhancement to IEMCAP","authors":"G. Brock, A. McMahon, J. Salazar, P. Griffin, G. Capraro, A. Drozd, A. Pesta","doi":"10.1109/NSEMC.1989.37167","DOIUrl":"https://doi.org/10.1109/NSEMC.1989.37167","url":null,"abstract":"A description is given of a field-to-wire coupling model enhancement to the Intrasystem Electromagnetic Compatibility Analysis Program (IEMCAP), along with a comparison of the enhanced and previous versions of IEMCAP. The previous model incorporates a bounding algorithm based on transmission line theory. High frequencies or large distances above the ground plane cause the transmission line model to break down. This motivated the enhancement to handle field-to-wire coupling from 1 to 40 GHz. This new model incorporates the results of experimental shielding measurements performed in a mode tuned reverberation chamber and method-of-moments calculations. The algorithms have been implemented in a modular manner and provide a smooth transition with the previous low-frequency IEMCAP predictions. Comparisons between the previous field-to-wire results and the enhanced algorithm results show that the new field-to-wire calculations are much less conservative. However, they match well with measured data. The new version of IEMCAP provides four new options: an out-of-band representation of port termination impedance, a user-selected flag for the presence of an exposed center conductor, a statistical confidence factor flag, and wire propagation characteristics.<<ETX>>","PeriodicalId":408694,"journal":{"name":"National Symposium on Electromagnetic Compatibility","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131929496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2