Pub Date : 1996-08-19DOI: 10.1109/ISEMC.1996.561193
M. Stecher
The paper gives an overview of the current European emission specifications. They are not limited to radio frequency (RF) emissions, but deal with power frequency emissions-harmonics and voltage fluctuations-as well. RF emission specifications listed in the official journal of the European Communities follow generally the internationally accepted CISPR standards. Also related to a CISPR standard are specifications for the RF emissions of motor vehicles in the updated Directive 72/245/EEC. Specifications for medical electrical apparatus are not dealt with in this paper. An overview is also given of future developments of European emission specifications.
{"title":"The European emission specifications","authors":"M. Stecher","doi":"10.1109/ISEMC.1996.561193","DOIUrl":"https://doi.org/10.1109/ISEMC.1996.561193","url":null,"abstract":"The paper gives an overview of the current European emission specifications. They are not limited to radio frequency (RF) emissions, but deal with power frequency emissions-harmonics and voltage fluctuations-as well. RF emission specifications listed in the official journal of the European Communities follow generally the internationally accepted CISPR standards. Also related to a CISPR standard are specifications for the RF emissions of motor vehicles in the updated Directive 72/245/EEC. Specifications for medical electrical apparatus are not dealt with in this paper. An overview is also given of future developments of European emission specifications.","PeriodicalId":296175,"journal":{"name":"Proceedings of Symposium on Electromagnetic Compatibility","volume":"447 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131804543","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}
Pub Date : 1996-08-19DOI: 10.1109/ISEMC.1996.561269
D. Trout
Since the late 80s bulk current injection (BCI) techniques have gained wide acceptance in aerospace, commercial and military electromagnetic interference (EMI) testing. The BCI techniques provide a low cost and technically superior result to radiated techniques at low frequencies. There has always been conflict between adherents to radiated techniques and the newer BCI techniques. This investigation focuses on the degree to which BCI techniques accurately simulate the radiated mechanism of field-to-wire coupling.
{"title":"Investigation of the bulk current injection technique by comparison to induced currents from radiated electromagnetic fields","authors":"D. Trout","doi":"10.1109/ISEMC.1996.561269","DOIUrl":"https://doi.org/10.1109/ISEMC.1996.561269","url":null,"abstract":"Since the late 80s bulk current injection (BCI) techniques have gained wide acceptance in aerospace, commercial and military electromagnetic interference (EMI) testing. The BCI techniques provide a low cost and technically superior result to radiated techniques at low frequencies. There has always been conflict between adherents to radiated techniques and the newer BCI techniques. This investigation focuses on the degree to which BCI techniques accurately simulate the radiated mechanism of field-to-wire coupling.","PeriodicalId":296175,"journal":{"name":"Proceedings of Symposium on Electromagnetic Compatibility","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114512895","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}
Pub Date : 1996-08-19DOI: 10.1109/ISEMC.1996.561239
J. Roden, S. Gedney, C. R. Paul
In this paper we demonstrate the accuracy of the FDTD technique in calculating the signal propagation characteristics of a twisted pair transmission line. The PML absorbing boundary condition is applied in non-orthogonal coordinates in order to accurately model the wire contours with minimal error from sidewall reflections. The effects of the wire dielectric coating as well as the wire twist are examined.
{"title":"A rigorous analysis of twisted pair transmission lines using non-orthogonal FDTD and the PML absorbing boundary condition","authors":"J. Roden, S. Gedney, C. R. Paul","doi":"10.1109/ISEMC.1996.561239","DOIUrl":"https://doi.org/10.1109/ISEMC.1996.561239","url":null,"abstract":"In this paper we demonstrate the accuracy of the FDTD technique in calculating the signal propagation characteristics of a twisted pair transmission line. The PML absorbing boundary condition is applied in non-orthogonal coordinates in order to accurately model the wire contours with minimal error from sidewall reflections. The effects of the wire dielectric coating as well as the wire twist are examined.","PeriodicalId":296175,"journal":{"name":"Proceedings of Symposium on Electromagnetic Compatibility","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133785707","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}
Pub Date : 1996-08-19DOI: 10.1109/ISEMC.1996.561231
M. D'amore, M. S. Sarto
New expressions of the ground impedance and admittance matrices for multiconductor line simulation are proposed, which are valid in a wide frequency-range. The time-domain formulation of the ground return parameters is obtained analytically by the inverse Fourier transform, based on the rational approximation in the frequency-domain. In the time-domain telegraphers' equations the convolution terms including the transient ground parameters are rearranged in order to achieve a more efficient implementation in numerical solution codes. The sensitivity of the proposed model to the ground conductivity and line geometrical parameters is investigated with reference to a three-conductor line. Comparisons with the results obtained by using the Carson ground impedances are carried out.
{"title":"Transient formulation of lossy ground return parameters for time-domain transmission line analysis","authors":"M. D'amore, M. S. Sarto","doi":"10.1109/ISEMC.1996.561231","DOIUrl":"https://doi.org/10.1109/ISEMC.1996.561231","url":null,"abstract":"New expressions of the ground impedance and admittance matrices for multiconductor line simulation are proposed, which are valid in a wide frequency-range. The time-domain formulation of the ground return parameters is obtained analytically by the inverse Fourier transform, based on the rational approximation in the frequency-domain. In the time-domain telegraphers' equations the convolution terms including the transient ground parameters are rearranged in order to achieve a more efficient implementation in numerical solution codes. The sensitivity of the proposed model to the ground conductivity and line geometrical parameters is investigated with reference to a three-conductor line. Comparisons with the results obtained by using the Carson ground impedances are carried out.","PeriodicalId":296175,"journal":{"name":"Proceedings of Symposium on Electromagnetic Compatibility","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127229868","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}
Pub Date : 1996-08-19DOI: 10.1109/ISEMC.1996.561249
M. Ju, M. Kriege
This is an attempt to model the cable connecting the mother board of a notebook computer to its flat panel display as a finite length dipole. The goal is to generate a first order approximation to prediction the electromagnetic emission.
{"title":"Prediction of electromagnetic emissions from the cable connecting the notebook computer's mother board to its flat panel display","authors":"M. Ju, M. Kriege","doi":"10.1109/ISEMC.1996.561249","DOIUrl":"https://doi.org/10.1109/ISEMC.1996.561249","url":null,"abstract":"This is an attempt to model the cable connecting the mother board of a notebook computer to its flat panel display as a finite length dipole. The goal is to generate a first order approximation to prediction the electromagnetic emission.","PeriodicalId":296175,"journal":{"name":"Proceedings of Symposium on Electromagnetic Compatibility","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114837318","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}
Pub Date : 1996-08-19DOI: 10.1109/ISEMC.1996.561234
Zhu Desheng, Chong Weng Hoe, Lau Chee Kin
In this paper we present a new radiated emission prediction method for equipment with relatively long interface cables by using cable current measurement techniques. It takes into account the current distribution waveform on the cable, the current fluctuation, the image effect of the cable, the emission maximization procedure at the OATS as well as the radiation pattern of the receiving antenna. It is proved to be a useful diagnostic tool to predict preliminarily electromagnetic emission from long cable equipment.
{"title":"Modeling of radiated electromagnetic emission coming from interface cables of an equipment","authors":"Zhu Desheng, Chong Weng Hoe, Lau Chee Kin","doi":"10.1109/ISEMC.1996.561234","DOIUrl":"https://doi.org/10.1109/ISEMC.1996.561234","url":null,"abstract":"In this paper we present a new radiated emission prediction method for equipment with relatively long interface cables by using cable current measurement techniques. It takes into account the current distribution waveform on the cable, the current fluctuation, the image effect of the cable, the emission maximization procedure at the OATS as well as the radiation pattern of the receiving antenna. It is proved to be a useful diagnostic tool to predict preliminarily electromagnetic emission from long cable equipment.","PeriodicalId":296175,"journal":{"name":"Proceedings of Symposium on Electromagnetic Compatibility","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114962320","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}
Pub Date : 1996-08-19DOI: 10.1109/ISEMC.1996.561409
Lin Lu, V. Ungvichian
Designing a digital circuit with faster clock rates, low power consumption, and minimal interline-coupling (or crosstalk) needs a critical board-level optimization. This paper refers to a multivariable optimization technique using a spectral domain approach such that the crosstalk and signal-distortions in multi-layered, multi-conductor microstrip-lines can be reduced significantly. Simulated results show that the maximum level of crosstalk in all the sense-lines can be reduced at least by 42% as compared to the method(s) employing non-optimization techniques.
{"title":"An optimization technique to minimize crosstalk in multi-layered and multi-microstrip-line board of high-speed digital circuits","authors":"Lin Lu, V. Ungvichian","doi":"10.1109/ISEMC.1996.561409","DOIUrl":"https://doi.org/10.1109/ISEMC.1996.561409","url":null,"abstract":"Designing a digital circuit with faster clock rates, low power consumption, and minimal interline-coupling (or crosstalk) needs a critical board-level optimization. This paper refers to a multivariable optimization technique using a spectral domain approach such that the crosstalk and signal-distortions in multi-layered, multi-conductor microstrip-lines can be reduced significantly. Simulated results show that the maximum level of crosstalk in all the sense-lines can be reduced at least by 42% as compared to the method(s) employing non-optimization techniques.","PeriodicalId":296175,"journal":{"name":"Proceedings of Symposium on Electromagnetic Compatibility","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130170966","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}
Pub Date : 1996-08-19DOI: 10.1109/ISEMC.1996.561218
A. Enders
Standardized measurement procedures for field homogeneity restrict themselves to antennas which have simple and stable radiation characteristics. However, the complicated radiation patterns of real devices might react with a greater sensitivity to their surroundings. In such a case larger errors in the field strength determination arise than are suggested by standardized compliance tests of alternate test sites. The demonstration of such discrepancies sheds new light on the suitability of all kinds of alternate test sites for EMC-testing as well as the suitability of different absorber technologies for anechoic chambers.
{"title":"Real performance of semi-anechoic chambers depending on absorber technology","authors":"A. Enders","doi":"10.1109/ISEMC.1996.561218","DOIUrl":"https://doi.org/10.1109/ISEMC.1996.561218","url":null,"abstract":"Standardized measurement procedures for field homogeneity restrict themselves to antennas which have simple and stable radiation characteristics. However, the complicated radiation patterns of real devices might react with a greater sensitivity to their surroundings. In such a case larger errors in the field strength determination arise than are suggested by standardized compliance tests of alternate test sites. The demonstration of such discrepancies sheds new light on the suitability of all kinds of alternate test sites for EMC-testing as well as the suitability of different absorber technologies for anechoic chambers.","PeriodicalId":296175,"journal":{"name":"Proceedings of Symposium on Electromagnetic Compatibility","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130424124","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}
Pub Date : 1996-08-19DOI: 10.1109/ISEMC.1996.561264
J. Quine, D. Overrocker, K. Fisher, J.P. Streeter, A. Pesta
Summary form only given. Gasketed seams are currently characterized by the surface transfer impedance which relates applied excitation current density, J, on the input side of the gasketed seam to the open circuit voltage, VOC, on the output side. But this method gives no information on the power radiated into the output region. With the new method, VOC is measured directly with a simple hand-field voltage probe comprising a small-diameter semi-rigid coaxial cable that has the center conductor protruding about one-eighth of an inch beyond the solid metal shield. The probe is moved along the gasketed seam while contacting one side with the center conductor, and the other side with the shield. The average value of the square of VOC along the seam is related to the average power, PC, transmitted by the probe cable to a sensitive power meter. The total radiated power, PR, is then determined using the radiation conductance of the seam, as given by the authors' Eq. (7) on page 393 of the August 1995 EMC Symposium Digest (Atlanta).
{"title":"New and simple method for the direct measurement of microwave power radiated from gasketed seams","authors":"J. Quine, D. Overrocker, K. Fisher, J.P. Streeter, A. Pesta","doi":"10.1109/ISEMC.1996.561264","DOIUrl":"https://doi.org/10.1109/ISEMC.1996.561264","url":null,"abstract":"Summary form only given. Gasketed seams are currently characterized by the surface transfer impedance which relates applied excitation current density, J, on the input side of the gasketed seam to the open circuit voltage, VOC, on the output side. But this method gives no information on the power radiated into the output region. With the new method, VOC is measured directly with a simple hand-field voltage probe comprising a small-diameter semi-rigid coaxial cable that has the center conductor protruding about one-eighth of an inch beyond the solid metal shield. The probe is moved along the gasketed seam while contacting one side with the center conductor, and the other side with the shield. The average value of the square of VOC along the seam is related to the average power, PC, transmitted by the probe cable to a sensitive power meter. The total radiated power, PR, is then determined using the radiation conductance of the seam, as given by the authors' Eq. (7) on page 393 of the August 1995 EMC Symposium Digest (Atlanta).","PeriodicalId":296175,"journal":{"name":"Proceedings of Symposium on Electromagnetic Compatibility","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128642662","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}
Pub Date : 1996-08-19DOI: 10.1109/ISEMC.1996.561199
D. Hansen, D. Ristau, W. Radasky, K.S. Smith
The Gigahertz TEM (GTEM) cell is a special TEM device that is used for both emission and immunity testing up to 1 GHz and above. Based on previous comments and recommendations in IEEE EMC sessions and including suggestions from several members of international standardization groups a very practical as well as challenging experiment was conducted. The E-field structure of a GTEM 1750 has been further investigated in a number of relevant points within the test volume up to one Gigahertz. An empty cell as well as a loaded cell have been tested. The box under investigation was a metal cube of 30 cm. Additional support was gained from computer simulations, leading to more detailed field contour plots. Based on this work a number of improvements and retrofits for existing GTEM cells is given.
{"title":"Sources of problems in the GTEM field structure and recommended solutions","authors":"D. Hansen, D. Ristau, W. Radasky, K.S. Smith","doi":"10.1109/ISEMC.1996.561199","DOIUrl":"https://doi.org/10.1109/ISEMC.1996.561199","url":null,"abstract":"The Gigahertz TEM (GTEM) cell is a special TEM device that is used for both emission and immunity testing up to 1 GHz and above. Based on previous comments and recommendations in IEEE EMC sessions and including suggestions from several members of international standardization groups a very practical as well as challenging experiment was conducted. The E-field structure of a GTEM 1750 has been further investigated in a number of relevant points within the test volume up to one Gigahertz. An empty cell as well as a loaded cell have been tested. The box under investigation was a metal cube of 30 cm. Additional support was gained from computer simulations, leading to more detailed field contour plots. Based on this work a number of improvements and retrofits for existing GTEM cells is given.","PeriodicalId":296175,"journal":{"name":"Proceedings of Symposium on Electromagnetic Compatibility","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128883188","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：