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1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)最新文献

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Measuring EMC emissions in the real world 测量现实世界中的电磁兼容辐射
1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.810087
D. Mawdsley
{"title":"Measuring EMC emissions in the real world","authors":"D. Mawdsley","doi":"10.1109/ISEMC.1999.810087","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.810087","url":null,"abstract":"Standard techniques for the measurement of emissions for most products require the use of an OATS (open area test site). In reality, very few organisations (excluding the Test Laboratories) have access to such facilities. However, an increasing number of organisations, particularly in Europe and increasingly in the US, are intent on conducting their own emissions checks, either for self certification or pre-test purposes. A study of the measurement uncertainty associated with the checking of emissions on a typical test site shows that in general these sites will introduce massive errors, unrelated to the cost or complexity of the instrumentation. This situation has been largely ignored by the industry but it is hoped that this paper will open up discussion in this field. The sources of this uncertainty are discussed and a technique described for measuring and correcting for these errors.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"159 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123077133","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
An improved method of modeling lossy transmission lines in finite-difference, time-domain analysis 有耗传输线时域有限差分建模的改进方法
1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.812943
Giulio Antonini, Antonio Orlandi, C. R. Paul
{"title":"An improved method of modeling lossy transmission lines in finite-difference, time-domain analysis","authors":"Giulio Antonini, Antonio Orlandi, C. R. Paul","doi":"10.1109/ISEMC.1999.812943","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.812943","url":null,"abstract":"In a recent publication it was shown that the high-frequency (when skin effect is well developed) resistance and internal inductive reactance are not equal for conductors of rectangular cross section such as printed circuit board lands and differ by as much as 30% unlike conductors of circular cross section (wires). The conventional modeling of these losses in the solution of the multiconductor transmission line (MTL) equations via the finite-difference, time-domain (FDTD) method makes use of the representation of this internal impedance of the conductors of the form A+B/spl radic/s/spl rlhar2/A+B/spl radic/j/spl omega/ where s is the Laplace transform variable and /spl omega/ is the radian frequency of excitation. The validity of this representation assumes that the high-frequency resistance and internal inductive reactance are equal which, it turns out, is not the case for conductors of rectangular cross section. Furthermore, it has recently been demonstrated that the representation A+B/spl radic/s in itself produces errors even if the assumption of equality of the high-frequency resistance and internal inductive reactance were true. The contribution of this paper is to provide an improved method for modeling this high-frequency loss in the time domain that overcomes the above two deficiencies and is suitable for the finite-difference, time-domain solution of the MTL equations. In addition, we show some typical crosstalk calculations with the new representation to determine whether the above differences are significant.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"127 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127077624","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: 12
Measurement and modeling of soil electromagnetic behavior 土壤电磁特性的测量与建模
1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.810203
C. Portela
{"title":"Measurement and modeling of soil electromagnetic behavior","authors":"C. Portela","doi":"10.1109/ISEMC.1999.810203","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.810203","url":null,"abstract":"The paper presents procedures to measure and model soil electromagnetic parameters, as a function of frequency, adequate for frequency domain and transient studies of soil behavior and its effect in grounding. Such procedures take into account the problems related to field measurements, the need of a physical validation, and the great diversity of soil characteristics. The physical model, with a small number of numeric parameters, reproduces, within measurement accuracy and small heterogeneity effects, the measurement results, assuring consistent physical behavior. The authors present the results obtained, using such procedures, of a large number of soil samples, with very different structures and geological origins, and quite far apart, and a statistical analysis of such results. Some examples illustrate the effect of soil parameters, namely in the frequency domain and for impulses typical of lightning discharges.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127201357","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: 102
Improved EMI performance by use of a three-terminal-capacitor applied to an IC power line 通过将三端电容器应用于集成电路电源线，提高了电磁干扰性能
1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.812887
Y. Shigeta, M. Ishizaki
{"title":"Improved EMI performance by use of a three-terminal-capacitor applied to an IC power line","authors":"Y. Shigeta, M. Ishizaki","doi":"10.1109/ISEMC.1999.812887","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.812887","url":null,"abstract":"As the electronics market moves towards higher clock speeds and increased functionality, EMI countermeasures are becoming more necessary and also more complicated. This is especially the case in digital circuits, where higher signal speed and increased component density causes greater susceptibility to coupling noise. In such cases EMI countermeasures applied only to the signal line are often inadequate. An effective solution is to apply conditioning of the IC power supply line. This paper details improved EMI performance by use of a three-terminal-capacitor applied to an IC power supply line versus the 'standard' cap approach.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"65 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124838347","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
Measurement of the antenna factor of diverse antennas using a modified standard site method 用改进的标准站位法测量不同天线的天线系数
1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.810083
J. Mclean, G. Crook, Zhong Chen, H. Foltz
{"title":"Measurement of the antenna factor of diverse antennas using a modified standard site method","authors":"J. Mclean, G. Crook, Zhong Chen, H. Foltz","doi":"10.1109/ISEMC.1999.810083","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.810083","url":null,"abstract":"The standard site method given in ANSI C63.5-1988 is a convenient, widely used technique for determining the antenna factors of EMC testing antennas using open area test sites. The technique works well for dipoles and dipole-like antennas including broadband biconical antennas. However, for some types of antennas including some log-periodic dipole arrays as well as some new types of compact, broadband radiators, this technique can result in significant measurement error as given since the gain and phase patterns of the antennas are not taken into account. The method can give accurate results if it is modified to include both the gain and phase patterns of the antennas. Here we describe this new technique and then demonstrate the effect it has on the accuracy of antenna factor measurements.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126034131","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 study of interference from AC electrified railway systems to nearby earth return circuits 交流电气化铁路系统对附近接地回路的干扰研究
1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.812962
Anngjerd Pleym, Jinxi Ma
{"title":"A study of interference from AC electrified railway systems to nearby earth return circuits","authors":"Anngjerd Pleym, Jinxi Ma","doi":"10.1109/ISEMC.1999.812962","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.812962","url":null,"abstract":"Inductive and conductive coupling from a railway system containing booster transformers to a parallel telephone cable is studied. An electromagnetic field approach and a circuit theory approach combined with a grounding analysis have been used for the study. The two methods give results that are in good agreement with each other for currents and potentials in both the disturbing and the disturbed circuits.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122438328","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
On the development of a low cost, high performance, EMI shield 就研制一种低成本、高性能的电磁干扰屏蔽
1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.812868
C. Brench
{"title":"On the development of a low cost, high performance, EMI shield","authors":"C. Brench","doi":"10.1109/ISEMC.1999.812868","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.812868","url":null,"abstract":"Developing an EMI shield for commercial products is a balance of ensuring adequate suppression of emissions while keeping the implementation cost to a minimum. A further and equally vital concern is to minimize the resistance to airflow in order that the system may be properly cooled. This paper presents a shield design that was successfully developed to meet these goals. More importantly, it examines the criteria that must be understood to permit the design of similar shields.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122936414","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
EMC compliance measurements per EN50083-2 符合EN50083-2的EMC合规性测量
1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.810103
G. Lin, M. J. Alvarado, D. Dennis
{"title":"EMC compliance measurements per EN50083-2","authors":"G. Lin, M. J. Alvarado, D. Dennis","doi":"10.1109/ISEMC.1999.810103","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.810103","url":null,"abstract":"This paper addresses and summarizes the guidelines for EMC compliance measurements per EN50083-2:1995 (cabled distribution systems for television, sound, and interactive multimedia signals, Part 2. Electromagnetic compatibility for equipment) including Amendment A1:1997. As the technology advances, i.e., broadband cable systems, merging of the telephone/data lines over hybrid fiber, and the popularity of fiber/coax systems, the applicability of this standard to various types of equipment is increasing. The scope of this standard not only includes headend equipment for television and sound signals, but also any equipment used in interfacing and transmitting all kinds of interactive multimedia signals excluding user terminals.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122615360","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
The work of ANSI C63 Subcommittee 6: Lab accreditation and conformity assessment and Subcommittee 8: Tests for electrical medical devices ANSI C63第6小组委员会的工作:实验室认可和合格评定和第8小组委员会的工作:电气医疗设备的测试
1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.812915
D. Hoolihan
{"title":"The work of ANSI C63 Subcommittee 6: Lab accreditation and conformity assessment and Subcommittee 8: Tests for electrical medical devices","authors":"D. Hoolihan","doi":"10.1109/ISEMC.1999.812915","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.812915","url":null,"abstract":"Subcommittee 6 of ANSI Accredited Standards Committee C63 is a technical committee which is developing documentation in the area of Laboratory Accreditation and Conformity Assessment. The Subcommittee has three working groups under its scope. It was formed to be able to respond to technical issues being created by the advancement of Mutual Recognition Agreements by the United States government as a means of lowering trade barriers. The first working group of the Subcommittee is developing checklists to be used by laboratory assessors when reviewing an EMC laboratory for conformance to \"ISO/IEC Guide 25-General Requirements for Calibration and Testing Laboratories\". The second working group of SC-6 has been looking at training aids for laboratory assessors. The third working group of SC-6 has been investigating proficiency testing using an \"artifact\". This group has been working with NVLAP and A2LA in formalizing a procedure to circulate the artifact to interested EMC laboratories for comparison purposes. Subcommittee 8 of the American National Standard Institute's Accredited Standards Committee C63 is devoted to developing standards in the area of EMC testing for electrical medical devices and has three working groups reporting to it. The first working group has developed ANSI C63.18 EMC Test Methods for hospitals. A second working group has been looking at patient connected equipment and their special situation as a recipient of electromagnetic energy. The third working group has been studying interference between cellular phones (wireless communication devices) and hearing aids.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123846367","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
Signal induced EMI in fibre channel cable-connector assemblies 光纤通道电缆连接器组件中信号诱导的电磁干扰
1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.812895
M. Xu, S. Radu, J. Knighten, J. Drewniak, T. Hubing, L. Hoeft, J. T. DiBene
{"title":"Signal induced EMI in fibre channel cable-connector assemblies","authors":"M. Xu, S. Radu, J. Knighten, J. Drewniak, T. Hubing, L. Hoeft, J. T. DiBene","doi":"10.1109/ISEMC.1999.812895","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.812895","url":null,"abstract":"The EMI performance of cable-connector assemblies designed for FC-0 transmission has been studied. Two types of cable and two connector styles were evaluated. Experimental results show that the dominant radiation mechanism for short cable lengths is the common-mode current caused by source and PCB skew that leaks to the exterior of the shield via the transfer impedance of the connector. However, the cable imbalance becomes a more significant source of common-mode current than the source skew when the cable assembly is tens of meters long.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123361320","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: 4
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