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2003 IEEE Symposium on Electromagnetic Compatibility. Symposium Record (Cat. No.03CH37446)最新文献

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Report on an inter-laboratory comparison of EMC antenna factors on antennas used above 1 GHz 1 GHz以上天线的EMC天线因子实验室间比较报告
2003 IEEE Symposium on Electromagnetic Compatibility. Symposium Record (Cat. No.03CH37446) Pub Date : 2003-10-14 DOI: 10.1109/ISEMC.2003.1236611
K. Hall
{"title":"Report on an inter-laboratory comparison of EMC antenna factors on antennas used above 1 GHz","authors":"K. Hall","doi":"10.1109/ISEMC.2003.1236611","DOIUrl":"https://doi.org/10.1109/ISEMC.2003.1236611","url":null,"abstract":"An inter-laboratory comparison of greater than 1 GHz antenna calibration was started in September 2002, managed by Hewlett-Packard. This study was started because data from six different calibrations of a horn antenna varied more than expected by National Physical Laboratory (UK). The variance was also more than that obtained in the very well defined and controlled study of an X-Band Horn antenna (Stubenrauch, 1996) study piloted by NIST. Initially three antennas were being circulated by ETS-Lindgren, Liberty Labs and NIST (US), Schwarzbeck, Rolf Heine, Rohde-Schwarz and CONFORMITAS (Germany), Austrian Research Center (Austria), NPL and Communications Research Laboratory (Japan). Four laboratories have completed the calibration. Preliminary results show worst case deviations between laboratories to be greater than 5dB. Some of variations appear to be abnormal spikes that do not follow the normally expected antenna trend and need to get resolved before supplying factors to a user/customer. One of the laboratories provided antenna pattern data that supports findings by Michael D, Foegelle (2002) and Christian Burns et al. (2003).","PeriodicalId":359422,"journal":{"name":"2003 IEEE Symposium on Electromagnetic Compatibility. Symposium Record (Cat. No.03CH37446)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127360736","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: 0
Quantitative estimation for electromagnetic field noise from PCB with switching transistor 开关晶体管PCB电磁场噪声的定量估计
2003 IEEE Symposium on Electromagnetic Compatibility. Symposium Record (Cat. No.03CH37446) Pub Date : 2003-10-14 DOI: 10.1109/ISEMC.2003.1236642
T. Kasuga, H. Inoue
{"title":"Quantitative estimation for electromagnetic field noise from PCB with switching transistor","authors":"T. Kasuga, H. Inoue","doi":"10.1109/ISEMC.2003.1236642","DOIUrl":"https://doi.org/10.1109/ISEMC.2003.1236642","url":null,"abstract":"To estimate the electromagnetic noise by low frequency switching operation, the spatial distributions of the electric and magnetic field around PCB with switching transistor are calculated by FDTD method implemented the switching transistor and measured. The size of the PCB is 225 mm long, 60 mm wide and 0.51 mm thick. The switching transistor (2SC2671) is operated by 3 MHz clock pulse. The simulated and measured results of the distribution on the PCB are good agreement. Even if the output impedance of the switching transistor is varied by switching operation, the standing wave on the PCB is observed. The spatial distribution in the y-direction into the 15 cm from PCB is not uniform due to the resonance of the signal line. From the quantitative estimation of the electromagnetic noise by switching operation is dominant to low impedance at on state. The noise radiation when the switching transistor turned on from off is problem.","PeriodicalId":359422,"journal":{"name":"2003 IEEE Symposium on Electromagnetic Compatibility. Symposium Record (Cat. No.03CH37446)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114346633","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: 0
Estimation of printed circuit board ground plane net partial inductance via noise voltage measurements 通过噪声电压测量估计印刷电路板地平面净偏电感
2003 IEEE Symposium on Electromagnetic Compatibility. Symposium Record (Cat. No.03CH37446) Pub Date : 2003-10-14 DOI: 10.1109/ISEMC.2003.1236599
F. Leferink, W. van Etten
{"title":"Estimation of printed circuit board ground plane net partial inductance via noise voltage measurements","authors":"F. Leferink, W. van Etten","doi":"10.1109/ISEMC.2003.1236599","DOIUrl":"https://doi.org/10.1109/ISEMC.2003.1236599","url":null,"abstract":"A radiated emission is caused by unwanted antenna currents, often denoted as common mode currents. These currents are created by a noise voltage in the reference of a system. Test setup for measuring this noise voltage has been presented in this paper. The conditions for using the set-up are described and validation results are shown. The noise voltage measured in various printed circuit boards with ground planes with various widths, slits or grids is presented. The net partial inductance of these ground planes has been deduced from the measured noise voltage.","PeriodicalId":359422,"journal":{"name":"2003 IEEE Symposium on Electromagnetic Compatibility. Symposium Record (Cat. No.03CH37446)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114359132","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
Efficient formulation of high-order boundary conditions for the high-frequency modeling of multilayer composite slab 多层复合楼板高频建模中高阶边界条件的高效表述
2003 IEEE Symposium on Electromagnetic Compatibility. Symposium Record (Cat. No.03CH37446) Pub Date : 2003-10-14 DOI: 10.1109/ISEMC.2003.1236702
M. Parise, M. S. Sarto
{"title":"Efficient formulation of high-order boundary conditions for the high-frequency modeling of multilayer composite slab","authors":"M. Parise, M. S. Sarto","doi":"10.1109/ISEMC.2003.1236702","DOIUrl":"https://doi.org/10.1109/ISEMC.2003.1236702","url":null,"abstract":"Boundary conditions for laminated composite panels reinforced with thin fibers are derived starting from the exact analytical model of an array of parallel conducting wires excited by a plane wave. Once evaluated the impedance sheet condition and the corresponding wave-transmission matrix valid for a single lamina, shielding performances of the whole panel are examined and compared with the results obtained considering each lamina as a homogeneous and anisotropic layer.","PeriodicalId":359422,"journal":{"name":"2003 IEEE Symposium on Electromagnetic Compatibility. Symposium Record (Cat. No.03CH37446)","volume":"161 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114454344","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: 14
Statistical shielding effectiveness - a modal/moment method approach to characterize the average shielding effectiveness over a wide frequency range including resonances 统计屏蔽效率-一种模态/矩方法来表征包括共振在内的宽频率范围内的平均屏蔽效率
2003 IEEE Symposium on Electromagnetic Compatibility. Symposium Record (Cat. No.03CH37446) Pub Date : 2003-10-14 DOI: 10.1109/ISEMC.2003.1236658
C. Bunting, Shih-Pin Yu, Z. Khan
{"title":"Statistical shielding effectiveness - a modal/moment method approach to characterize the average shielding effectiveness over a wide frequency range including resonances","authors":"C. Bunting, Shih-Pin Yu, Z. Khan","doi":"10.1109/ISEMC.2003.1236658","DOIUrl":"https://doi.org/10.1109/ISEMC.2003.1236658","url":null,"abstract":"This brief work emphasizes the application of numerical methods to explore the ideas related to shielding effectiveness from a statistical view. An empty rectangular box is examined using modal/moment methods. Fields statistics will be obtained by using frequency stirring borrowed from the ideas connected with reverberation chamber techniques. The work is intended to provide a means of representing the shielding effectiveness of structures that are large as compared to a wavelength in a simple way - an attempt at creating a nomograph for shielding effectiveness.","PeriodicalId":359422,"journal":{"name":"2003 IEEE Symposium on Electromagnetic Compatibility. Symposium Record (Cat. No.03CH37446)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123985457","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: 14
Design of miniaturized common-mode filter by multi-layer low temperature co-fired ceramic 多层低温共烧陶瓷的小型化共模滤波器设计
2003 IEEE Symposium on Electromagnetic Compatibility. Symposium Record (Cat. No.03CH37446) Pub Date : 2003-10-14 DOI: 10.1109/ISEMC.2003.1236625
B. Tseng, Lin-Kun Wu, J. Sheen, Ann-Lee Wang
{"title":"Design of miniaturized common-mode filter by multi-layer low temperature co-fired ceramic","authors":"B. Tseng, Lin-Kun Wu, J. Sheen, Ann-Lee Wang","doi":"10.1109/ISEMC.2003.1236625","DOIUrl":"https://doi.org/10.1109/ISEMC.2003.1236625","url":null,"abstract":"A miniaturized common-mode filter composed of multiple substrates is proposed in this paper. The pattern of each positive coil is interlaced with that of each negative coil, whereby when the positive and negative coils are alternately stacked, the positive coils do not overlap negative coils. With such offset configuration of the coils, the parasitic capacitance introduced between overlapped traces is reduced. So, the thickness of each substrate can be decreased and the size of the entire filter is effectively reduced. Good agreements between simulated and measured results are demonstrated. Further, the effectiveness of this filter is revealed by radiation spectrum measurements.","PeriodicalId":359422,"journal":{"name":"2003 IEEE Symposium on Electromagnetic Compatibility. Symposium Record (Cat. No.03CH37446)","volume":"10 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116932055","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: 49
Limitations of the modified transmission line equations, a comparison with NEC 修正的传输线方程的局限性，与NEC的比较
2003 IEEE Symposium on Electromagnetic Compatibility. Symposium Record (Cat. No.03CH37446) Pub Date : 2003-10-14 DOI: 10.1109/ISEMC.2003.1236673
D. A. Larrabee
{"title":"Limitations of the modified transmission line equations, a comparison with NEC","authors":"D. A. Larrabee","doi":"10.1109/ISEMC.2003.1236673","DOIUrl":"https://doi.org/10.1109/ISEMC.2003.1236673","url":null,"abstract":"We utilize both the NEC computer code and the transmission line models to compute the resonant frequencies, amplitudes and Q of the low order resonances (<6) of a transmission line illuminated by an electromagnetic wave. We find that the commonly used assumption that the transmission line equations are valid so long as the wavelength of the electromagnetic wave is much larger than the separation between the wires to be insufficient. In addition we find that unless the line is much longer than the separation between the wires, there can be major disagreements between the transmission line equations and Maxwell's equations. We find that in these cases the transmission line equations give resonant frequencies that are too high, field cable coupling that is too high and resonant Q's that are too high. The paper suggests some simple explanations in terms of re-radiation of energy and the electrical length of the transmission lines.","PeriodicalId":359422,"journal":{"name":"2003 IEEE Symposium on Electromagnetic Compatibility. Symposium Record (Cat. No.03CH37446)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115576658","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: 6
Electromagnetic field distribution inside an automobile vehicle 汽车内部的电磁场分布
2003 IEEE Symposium on Electromagnetic Compatibility. Symposium Record (Cat. No.03CH37446) Pub Date : 2003-10-14 DOI: 10.1109/ISEMC.2003.1236697
Y. Shiraki, K. Sugahara, S. Tanabe, K. Nakamoto, T. Watanabe
{"title":"Electromagnetic field distribution inside an automobile vehicle","authors":"Y. Shiraki, K. Sugahara, S. Tanabe, K. Nakamoto, T. Watanabe","doi":"10.1109/ISEMC.2003.1236697","DOIUrl":"https://doi.org/10.1109/ISEMC.2003.1236697","url":null,"abstract":"Electromagnetic radiation phenomena due to electronic equipment inside an automobile have been analyzed from both numerical and experimental viewpoints. The numerical procedure is carried out using a hybrid method of a finite difference time domain (FDTD) and a transmission line technique (TL technique). This combined procedure is suitable for solving an automobile with long wires connected to an electric control in it. Numerical results were compared with experimental measurements with a real automobile, showing in a good agreement between them. Finally an FM radio antenna position that minimizes noise intensity caused by electronic control units was determined by the hybrid method.","PeriodicalId":359422,"journal":{"name":"2003 IEEE Symposium on Electromagnetic Compatibility. Symposium Record (Cat. No.03CH37446)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129440671","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: 5
EM emissions underground: a matter of concern? 地下电磁辐射:一个值得关注的问题?
2003 IEEE Symposium on Electromagnetic Compatibility. Symposium Record (Cat. No.03CH37446) Pub Date : 2003-10-14 DOI: 10.1109/ISEMC.2003.1236637
V. Pintos, B. A. Ovide, R. Saint-Nom, C. Munoz
{"title":"EM emissions underground: a matter of concern?","authors":"V. Pintos, B. A. Ovide, R. Saint-Nom, C. Munoz","doi":"10.1109/ISEMC.2003.1236637","DOIUrl":"https://doi.org/10.1109/ISEMC.2003.1236637","url":null,"abstract":"Electromagnetic field strength measurements of mobile phone base station emissions underground are the issues addressed in this paper. The city of Buenos Aires has a subway network partially served by cellular phone communications. Our team has made extensive measurements along the metro system, letting us build a database where interesting results may be extracted. They are contrasted against our local standards, which set the maximum allowed power density levels. A case study is developed to bring up conclusions about reliability and public opinion tendencies.","PeriodicalId":359422,"journal":{"name":"2003 IEEE Symposium on Electromagnetic Compatibility. Symposium Record (Cat. No.03CH37446)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128597015","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
A numerical analysis of antenna factor of bilog antennas for normalized site attenuation and EMC measurement 归一化站点衰减和电磁兼容测量中生物天线天线因子的数值分析
2003 IEEE Symposium on Electromagnetic Compatibility. Symposium Record (Cat. No.03CH37446) Pub Date : 2003-10-14 DOI: 10.1109/ISEMC.2003.1236713
Hsing-Feng Chen, Ken-Huang Lin
{"title":"A numerical analysis of antenna factor of bilog antennas for normalized site attenuation and EMC measurement","authors":"Hsing-Feng Chen, Ken-Huang Lin","doi":"10.1109/ISEMC.2003.1236713","DOIUrl":"https://doi.org/10.1109/ISEMC.2003.1236713","url":null,"abstract":"The antenna factor (AF) values are typically determined based on the assumption that the antenna is in free space. In practice, the NSA and EMC measurement are often conducted in the presence of a perfectly conducting ground plane. The AF of bilog antenna used for measurement might be seriously affected by a ground plane. In addition, the variation of the active phase center of log periodic element can also induce variations in AF. In this paper, software codes based on method of moments are used to study the AF of a bilog antenna over a ground plane at different heights for both horizontal and vertical polarizations. Meanwhile, the numerical analyses of the mutual coupling between antenna and its image, and the variation of the active phase center are also carried out.","PeriodicalId":359422,"journal":{"name":"2003 IEEE Symposium on Electromagnetic Compatibility. Symposium Record (Cat. No.03CH37446)","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127139336","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: 7
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