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Proceedings of IEEE Symposium on Electromagnetic Compatibility最新文献

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Modal estimates to describe the topological attributes of multidimensional systems 模态估计用于描述多维系统的拓扑属性
Proceedings of IEEE Symposium on Electromagnetic Compatibility Pub Date : 1994-08-22 DOI: 10.1109/ISEMC.1994.385678
S. Primak, J. Lo Vetri
{"title":"Modal estimates to describe the topological attributes of multidimensional systems","authors":"S. Primak, J. Lo Vetri","doi":"10.1109/ISEMC.1994.385678","DOIUrl":"https://doi.org/10.1109/ISEMC.1994.385678","url":null,"abstract":"A method of constructing steady state modal estimates of multidimensional systems with harmonic external excitation is used to derive the fuzzy electromagnetic topology attributes within upper and lower frequency bounds of the external excitation. These attributes can be used within the electromagnetic topology formalism to estimate the electromagnetic environments inside complex systems like aircraft, ships, helicopters, etc. Modal estimates for the specific example of a power line filter and a multi-conductor transmission line are determined.<<ETX>>","PeriodicalId":154914,"journal":{"name":"Proceedings of IEEE Symposium on Electromagnetic Compatibility","volume":"369 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124623524","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
SAR mapping within the human eye due to portable transceivers 由于便携式收发器，人眼内的SAR映射
Proceedings of IEEE Symposium on Electromagnetic Compatibility Pub Date : 1994-08-22 DOI: 10.1109/ISEMC.1994.385690
K.E. Mokhtech, G. Delisle, A. Roberge
{"title":"SAR mapping within the human eye due to portable transceivers","authors":"K.E. Mokhtech, G. Delisle, A. Roberge","doi":"10.1109/ISEMC.1994.385690","DOIUrl":"https://doi.org/10.1109/ISEMC.1994.385690","url":null,"abstract":"The electromagnetic field and induced specific absorption rate (SAR) within a detailed model of the human eye are calculated for different cellular telephony frequencies (840, 915, 1500 and 1800 MHz) at the ANSI uncontrolled environment exclusion distance of 25 mm and closer. The computations are performed with the finite-difference time domain method (FDTD) and the heating potential, derived from electric field values, is used to calculate the temperature distribution induced within the model. The computations are performed with the implicit alternating-direction (IAD) algorithm for the heat conduction equation. It is shown that, for short distances and for the higher frequencies of interest, substantial temperature elevation can occur close to the center of the eyeball.<<ETX>>","PeriodicalId":154914,"journal":{"name":"Proceedings of IEEE Symposium on Electromagnetic Compatibility","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123409347","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
Stable time domain solutions for EMC problems using PEEC circuit models 使用PEEC电路模型的EMC问题的稳定时域解决方案
Proceedings of IEEE Symposium on Electromagnetic Compatibility Pub Date : 1994-08-22 DOI: 10.1109/ISEMC.1994.385629
A. Ruehli, U. Miekkala, A. Bellen, H. Heeb
{"title":"Stable time domain solutions for EMC problems using PEEC circuit models","authors":"A. Ruehli, U. Miekkala, A. Bellen, H. Heeb","doi":"10.1109/ISEMC.1994.385629","DOIUrl":"https://doi.org/10.1109/ISEMC.1994.385629","url":null,"abstract":"Time domain solutions for electromagnetic problems are important for many EMC applications like ESD and integrated circuit EMI. The most common solution formulation for such problems is based on integral equations. The instabilities in the solution associated with integral equation techniques in the time domain are well known. In this paper we show that the instability may be either due to the numerical technique used for the time integration or due to problems created by the discrete representation for the solution of the problem by the numerical integration technique. We use the Partial Element Equivalent Circuit (PEEC) formulation of the EFIE integral equation for small model problems and some popular integration techniques to give specific examples of instabilities in the time domain solution. Importantly, we introduce techniques which lead to stable results.<<ETX>>","PeriodicalId":154914,"journal":{"name":"Proceedings of IEEE Symposium on Electromagnetic Compatibility","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115520233","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: 50
Commercial GPS receiver susceptibility evaluation 商用GPS接收机敏感性评价
Proceedings of IEEE Symposium on Electromagnetic Compatibility Pub Date : 1994-08-22 DOI: 10.1109/ISEMC.1994.385682
J.M. Harris, M.L. Wheeler, J. Daher
{"title":"Commercial GPS receiver susceptibility evaluation","authors":"J.M. Harris, M.L. Wheeler, J. Daher","doi":"10.1109/ISEMC.1994.385682","DOIUrl":"https://doi.org/10.1109/ISEMC.1994.385682","url":null,"abstract":"The radio frequency (RF) susceptibility characteristics of two commercial Global Positioning System (GPS) receivers were evaluated. A first-order analysis was performed to predict the receiver susceptibility thresholds based on the receiver sensitivity and processing gain. The receiver susceptibility thresholds in the post-acquisition mode were then measured for various interference signal frequencies and modulations. Both receivers exhibited very low susceptibility thresholds to in-band continuous wave (CW) signals. In addition, both receivers could be overdriven with an out-of-band signal. In this state the receivers indicated acceptable figures of merit despite loss of satellite signal lock.<<ETX>>","PeriodicalId":154914,"journal":{"name":"Proceedings of IEEE Symposium on Electromagnetic Compatibility","volume":"255 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115781242","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: 3
Evaluation of electric field and magnetic field shielding effectiveness and polarizabilities of non metallic samples using dual TEM cell 用双TEM电池评价非金属样品的电场和磁场屏蔽效果和极化率
Proceedings of IEEE Symposium on Electromagnetic Compatibility Pub Date : 1994-08-22 DOI: 10.1109/ISEMC.1994.385644
K. G. Thomas, K. M. Krishnaiah, A. Chordia, J. Daher
{"title":"Evaluation of electric field and magnetic field shielding effectiveness and polarizabilities of non metallic samples using dual TEM cell","authors":"K. G. Thomas, K. M. Krishnaiah, A. Chordia, J. Daher","doi":"10.1109/ISEMC.1994.385644","DOIUrl":"https://doi.org/10.1109/ISEMC.1994.385644","url":null,"abstract":"This paper describes the experimental procedure to validate the dual Transverse Electromagnetic (TEM) cell for the evaluation of shielding effectiveness (SE) of materials. The dual TEM cell technique allows one to simultaneously measure both the electric and magnetic field SE of a test sample placed in a small aperture in the common wall of the dual TEM cell. The electric and magnetic field polarizabilities and SE of two different sample materials were measured as a function of frequency. The measured data were compared with the theoretical values.<<ETX>>","PeriodicalId":154914,"journal":{"name":"Proceedings of IEEE Symposium on Electromagnetic Compatibility","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114950541","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: 1
Site attenuation calculation of ferrite chamber 铁氧体腔室的场地衰减计算
Proceedings of IEEE Symposium on Electromagnetic Compatibility Pub Date : 1994-08-22 DOI: 10.1109/ISEMC.1994.385626
K. Shimada, S. Takeya
{"title":"Site attenuation calculation of ferrite chamber","authors":"K. Shimada, S. Takeya","doi":"10.1109/ISEMC.1994.385626","DOIUrl":"https://doi.org/10.1109/ISEMC.1994.385626","url":null,"abstract":"In a previous paper the authors measured the values of S parameter of radio-frequency (RF) absorbers, using a large square coaxial line at frequencies below 100 MHz and evaluated the results [S. Takeya, K. Shimada \"New measurement of RF absorber characteristics by large square coaxial line\", 1993 IEEE International Symposium on EMC]. The present authors used the results obtained from the large coaxial line to simulate the site attenuation of a ferrite chamber and compared the simulation results with actually measured results. When the measurement results of a small coaxial line (39 mm diameter) were used, the accuracy of the calculation results was not high. Therefore, they adopted the results obtained from measurements made with the large coax, which represent the effects of gaps between ferrite tiles, and confirmed the improvement of simulation accuracy. This enabled to numerically analyze the site attenuation which varied depending on the sizes of gaps of the ferrite tiles, i.e., the difference in fabrication and placement conditions of RF absorbers. The authors were then able to apply this analysis to the design of ferrite chambers.<<ETX>>","PeriodicalId":154914,"journal":{"name":"Proceedings of IEEE Symposium on Electromagnetic Compatibility","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129617552","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
Minimum separation distance between AC power lines and radio communication sites 交流电源线与无线电通信站之间的最小间距
Proceedings of IEEE Symposium on Electromagnetic Compatibility Pub Date : 1994-08-22 DOI: 10.1109/ISEMC.1994.385633
V. Arafiles
{"title":"Minimum separation distance between AC power lines and radio communication sites","authors":"V. Arafiles","doi":"10.1109/ISEMC.1994.385633","DOIUrl":"https://doi.org/10.1109/ISEMC.1994.385633","url":null,"abstract":"Recent studies presented new models for describing the impact of power line EMI on military communications sites. This paper presents a study of more than twenty years of power line EMI measurements close to the communication sites to develop a criteria for defining the minimum separation distance between communication sites and AC power distribution or power transmission facilities. Our analysis of the test data indicate that to protect communication sites from power line EMI, we must institute a program for maintenance of all power lines within 13 kilometers and to prevent the construction of new power distribution facilities within distances from the communication sites that are more practical than previously known.<<ETX>>","PeriodicalId":154914,"journal":{"name":"Proceedings of IEEE Symposium on Electromagnetic Compatibility","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125188946","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
Simulation methods to determine cross-talk in three dimensional environment 三维环境下确定串扰的仿真方法
Proceedings of IEEE Symposium on Electromagnetic Compatibility Pub Date : 1994-08-22 DOI: 10.1109/ISEMC.1994.385609
M. L. Markel, Yibong Dong, R. Sharma
{"title":"Simulation methods to determine cross-talk in three dimensional environment","authors":"M. L. Markel, Yibong Dong, R. Sharma","doi":"10.1109/ISEMC.1994.385609","DOIUrl":"https://doi.org/10.1109/ISEMC.1994.385609","url":null,"abstract":"Methods to simulate cross-talk in three-dimensional environments have been discussed. The finite element method (FEM) will be used to predict cross-talk. A major limit of the finite element method in the past has been its relative difficulty in modelling three-dimensional open configurations found in EMC problems. The MacNeal-Schwendler Corporation Electromagnetic Analysis System (MSC/EMAS), with its open boundary elements, now enables problems to be solved in three-dimensions that were previously considered solvable only with method of moment (MoM) codes and other full-wave techniques. The major limitations for those methods are they are relatively difficult to model and they're very time consuming. The lumped parameter methods are relatively easy to use but are limited to simple geometries. This article will also discuss the method to simulate the lumped parameter 3D environment using FEM as the preprocessor and a circuit simulator (SABER) as the solver. The comparison between FEM simulation results and circuit simulation results shows that the circuit simulator can achieve similar results as one does in the FEM method with much less computing. Since the circuit simulation can easily link the other circuits into this cross-talk model, this approach has great potential to simulate the cross-talk in the system/module level.<<ETX>>","PeriodicalId":154914,"journal":{"name":"Proceedings of IEEE Symposium on Electromagnetic Compatibility","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132735641","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
The evaluation of LEMP effects on subtransmission line using the method of moment: a comparison between TL and MTL model 矩量法评价LEMP对亚传输线的影响& TL与MTL模型的比较
Proceedings of IEEE Symposium on Electromagnetic Compatibility Pub Date : 1994-08-22 DOI: 10.1109/ISEMC.1994.385670
R. Moini, B. Kordi, M. Abedi
{"title":"The evaluation of LEMP effects on subtransmission line using the method of moment: a comparison between TL and MTL model","authors":"R. Moini, B. Kordi, M. Abedi","doi":"10.1109/ISEMC.1994.385670","DOIUrl":"https://doi.org/10.1109/ISEMC.1994.385670","url":null,"abstract":"An attempt has been made to evaluate the induced voltage on a 63 kV subtransmission line caused by lightning electromagnetic pulse (LEMP). For this purpose the electric field integral equation (EFIE) in time domain has been solved by the method of moment (MOM). The lightning channel is modelled by a monopole antenna, and according to the method of moment the excitation generator of proposed antenna is selected in such a way that time-space current distribution along the channel is compatible with the transmission line (TL), or modified transmission line (MTL) models. For both models the induced voltage along any point of the 63 kV phase conductor can be evaluated. The effect of shielding the wires can also be analysed. It is assumed that the lightning return stroke originates from the Earth surface in vicinity of the 63 kV structure. The proposed accurate method will help engineers to have an outstanding view on the protection of a 63 kV subtransmission line against lightning.<<ETX>>","PeriodicalId":154914,"journal":{"name":"Proceedings of IEEE Symposium on Electromagnetic Compatibility","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123471013","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
The effects of systems EMC on the connectivity of communication networks 系统电磁兼容对通信网络连通性的影响
Proceedings of IEEE Symposium on Electromagnetic Compatibility Pub Date : 1994-08-22 DOI: 10.1109/ISEMC.1994.385664
Zhu Xi, Dai Jingfeng
{"title":"The effects of systems EMC on the connectivity of communication networks","authors":"Zhu Xi, Dai Jingfeng","doi":"10.1109/ISEMC.1994.385664","DOIUrl":"https://doi.org/10.1109/ISEMC.1994.385664","url":null,"abstract":"In the paper, a mathematical model of a communication network is established by using a colored Petri net (CPN). An approach is proposed to determine the connectivities of communication edge trails connecting a node according to its equipment and the EMC environment. The connectivity of the communication system is analyzed on the basis of a CPN. The paper builds a foundation for the simulation of a communication system in which nodes are arbitrarily distributed.<<ETX>>","PeriodicalId":154914,"journal":{"name":"Proceedings of IEEE Symposium on Electromagnetic Compatibility","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123697858","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
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