S. Ghosh, A. Chakrabarty, S. Sanyal, V. Katti, S. Shastry
{"title":"Susceptibility testing using GTEM cell","authors":"S. Ghosh, A. Chakrabarty, S. Sanyal, V. Katti, S. Shastry","doi":"10.1109/ICEMIC.2002.1006518","DOIUrl":"https://doi.org/10.1109/ICEMIC.2002.1006518","url":null,"abstract":"The GTEM cell has been found as a suitable test environment for radiated susceptibility testing of electronic equipment. In Microwave Measurement Laboratory, Department of E & ECE, IIT Kharagpur, a GTEM cell with test volume 1 m /sup 3/ and characteristic impedance of 50 /spl Omega/ has been fabricated and is being successfully used for radiated emission and susceptibility testing. For susceptibility testing the device is intentionally put in the required amount of electric field. In this paper a method of moment based procedure is described to evaluate the field produced inside the cell due to a certain amount of applied power. The theoretical value is in good agreement with the measured one.","PeriodicalId":148043,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility (IEEE Cat. No.02TH8620)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116000207","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}
{"title":"EMC issues of radar receiver-a case study","authors":"G. Surya Prasad, N. Shanmugam","doi":"10.1109/ICEMIC.2002.1006523","DOIUrl":"https://doi.org/10.1109/ICEMIC.2002.1006523","url":null,"abstract":"A radar receiver subsystem is developed in a 3 channel-monopulse, low noise front-end configurations. The receiver consists of three identical channels for sum, azimuth difference and elevation difference outputs of the monopulse comparator and each of the channels has a low noise amplifier in the front end. The functional requirements of the receiver, and the subsystem design details with emphasis on EMC issues are described. The electromagnetic emissions and susceptibility characteristics of a typical radar receiver are measured and the results are critically analysed.","PeriodicalId":148043,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility (IEEE Cat. No.02TH8620)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127241091","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}
{"title":"Discrepancies and pitfalls of EMI suppression techniques","authors":"A. Sanyal","doi":"10.1109/ICEMIC.2002.1006527","DOIUrl":"https://doi.org/10.1109/ICEMIC.2002.1006527","url":null,"abstract":"Simple principles of EMI suppression in a complex EMI environment may not sometimes yield desirable results. Moreover, updating of various EMC standards and codes of practice related to good EMC engineering is not taking place coping with fast changing technological scenario. It is often reported that EMC measures have resulted in counter productive situations. In this paper, it is intended to address a few common EMC measures which may fall short of expected results unless realistic engineering thinking is put into place.","PeriodicalId":148043,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility (IEEE Cat. No.02TH8620)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125580073","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}
S. K. Ray, S. K. Singh, Subhamoy Banerjee, K. Goswami, T. K. Dey
{"title":"Estimation of radiation hazards generated on bio-objects by electromagnetic fields","authors":"S. K. Ray, S. K. Singh, Subhamoy Banerjee, K. Goswami, T. K. Dey","doi":"10.1109/ICEMIC.2002.1006543","DOIUrl":"https://doi.org/10.1109/ICEMIC.2002.1006543","url":null,"abstract":"Considering bio-objects as antennas to electromagnetic fields of different frequencies from extra low frequency to hundreds of GHz, specific absorption rates (SAR) are calculated with the help of a specially design software. The increase in temperature and hence change in ratios of Na/sup +/ and K/sup +/ ions inside and outside of a membrane due to the energy absorbed are also estimated.","PeriodicalId":148043,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility (IEEE Cat. No.02TH8620)","volume":"201 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123035704","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}
B. Karthikeyan, S. Shastry, M. Nageswararao, N. Prahaladrao
{"title":"Immunity response of fourth order input EMI filter for DC/DC converters of spacecraft subsystems","authors":"B. Karthikeyan, S. Shastry, M. Nageswararao, N. Prahaladrao","doi":"10.1109/ICEMIC.2002.1006533","DOIUrl":"https://doi.org/10.1109/ICEMIC.2002.1006533","url":null,"abstract":"Spacecraft subsystem level EMC tests have revealed that the conducted emissions at the input of DC/DC converters tend to go above the relevant MIL-STD-461C/D/E limits. A low pass fourth order input filter is required at the input of the DC/DC converter for reducing this conducted emission to a level that is below the MIL-STD limits. The filter is a bilateral network. It not only cuts off the noise emanating from the DC/DC converter but also enhances the immunity of the converter to input power line transients and other noise voltages on the bus. This paper presents the immunity response characteristics of the fourth order input EMI filter without and with parasitic elements. Simulation was done by the circuit simulator SPICE.","PeriodicalId":148043,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility (IEEE Cat. No.02TH8620)","volume":"65 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132723890","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}
{"title":"EMC evaluation and analysis of UPS","authors":"S. Chand, K. Chawla","doi":"10.1109/ICEMIC.2002.1006459","DOIUrl":"https://doi.org/10.1109/ICEMIC.2002.1006459","url":null,"abstract":"Computing devices are finding increasing importance day by day. Erratic power supplies pose a serious threat to the reliability and durability of data. The person working on system needs protection of data and UPS thus becomes a necessity. UPS stores energy into batteries and converts back the stored DC into an AC supply. Switching techniques are used to convert DC into AC. Switching of current generates electromagnetic emission which effects the nearby products. The emission generated from UPS may be of conducted type/radiated type or both. Advanced technologies of UPS are also sensitive and hence call for high immunity from electromagnetic noises. Since the computer supply is taken from UPS, hence the UPS shall be immune to power noises/disturbances and shall not generate such noises as well. EMI/EMC evaluation of UPS thus becomes very essential to ensure that the system works satisfactorily in the intended environment. The paper discusses various available specification for EMC evaluation of UPS and analyzes the working environment of UPS. It also highlights probable EMI sources and suppression and immunity improvement techniques for compliance of UPS to national and international norms.","PeriodicalId":148043,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility (IEEE Cat. No.02TH8620)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124653750","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}
{"title":"Computation of lightning induced voltages on telecommunication subscriber lines","authors":"P. Kannu, M. Thomas","doi":"10.1109/ICEMIC.2002.1006466","DOIUrl":"https://doi.org/10.1109/ICEMIC.2002.1006466","url":null,"abstract":"The electric and magnetic fields produced by a lightning stroke in the vicinity of a telecommunication line can illuminate the line and it can acquire induced overvoltages which may be detrimental to the equipments connected to the telecommunication line. The magnitude and waveshape of the electromagnetic fields produced by lightning as well as the induced voltage on telecommunication line are influenced by the finite conductivity of the ground. In this paper, the induced transient voltages on an overhead telecommunication subscriber line due to a nearby lightning stroke to the ground are computed. From the results it is seen that the induced voltage is bipolar for all the observation points except at the line midpoint for the lightning striking point location chosen in this study. It is also observed that the finite ground conductivity decreases the magnitude of the induced voltage at the line terminations where as it increases the induced voltage as the line mid point is approached. The results obtained in this study will be useful in evolving a suitable lightning protection scheme for the rural telephone exchanges which are interconnected using overhead lines instead of underground cables as in the case of urban exchanges. At the same time these rural telephone exchanges have become more vulnerable to transient overvoltages as they are being converted into digital ones with their susceptibility levels for transient overvoltages being much lower than the old electromechanical exchanges.","PeriodicalId":148043,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility (IEEE Cat. No.02TH8620)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127120398","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}
{"title":"Comparison of civilian EMC immunity standards with automative EMC immunity standards","authors":"K. Sakthivel, S.K. Das, K. Kini","doi":"10.1109/ICEMIC.2002.1006463","DOIUrl":"https://doi.org/10.1109/ICEMIC.2002.1006463","url":null,"abstract":"The paper discusses a detailed comparative study between civilian EMC immunity standards, IEC 61000-4-series and automotive EMC immunity standards, SAE J1113-series. The objective of this paper is to find out major differences between these two important EMC immunity standards and the reasons behind them. Generally automotive EMC immunity standards (SAE J1113 - series) are more stringent than civilian EMC immunity standards (IEC 61000-4-series), due to the direct human safety aspects involved in the usage of automobiles. This is explained with more detail in the paper. The paper highlights the important deviations in the test specification of the following civilian EMC immunity standards (IEC 61000-4-series) and automotive EMC immunity standards (SAE J1113-series): (i) IEC 61000-4-2, 1998 and SAE J1113-13, OCT 1997, for electrostatic discharge (ESD) immunity test; (ii) IEC 61000-4-3, 1998 and SAE J1113-21, JAN 1998, for radiated radio frequency electromagnetic field immunity test; and (iii) IEC 61000-4-8, 1993 and SAE J1113-22, OCT 1996, for radiated power frequency magnetic field immunity test.","PeriodicalId":148043,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility (IEEE Cat. No.02TH8620)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129488347","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}
{"title":"Performance improvement of an EMC test laboratory through key measures of quality management system-a case study","authors":"D. Kumar, S.K. Das","doi":"10.1109/ICEMIC.2002.1006519","DOIUrl":"https://doi.org/10.1109/ICEMIC.2002.1006519","url":null,"abstract":"The paper describes the significant role of ISO 9000 Certification even for those organisations who offer EMC Services to industry since such Certification provides a benchmark of quality for EMC services. Quality system certification serves as the foundation for quality and business improvements. It discusses the key issues of success for continuous improvement in both quality and business, which depends on how well the quality system has been maintained and measured effectively. The paper also describes how the effectiveness of quality system as per ISO 9001:1994 standards could be measured for performance improvement of an EMC Test Laboratory.","PeriodicalId":148043,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility (IEEE Cat. No.02TH8620)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130812019","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}
{"title":"Prediction and measurement of EMI pollution generated by the personal computers","authors":"I.M. Rao","doi":"10.1109/ICEMIC.2002.1006453","DOIUrl":"https://doi.org/10.1109/ICEMIC.2002.1006453","url":null,"abstract":"This paper reviews the electromagnetic field pollution generated by digital computers with their benchmark results. It reviews the theoretical analysis and prediction for the generated pollution of PCs. Further, it reviews the practical measurements carried out for a typical Compaq personal computer, in a shielded chamber, to find the field strength at different frequency bands for the spectrum of the emission. It also covers LAN emission measurements and how this analysis and data is useful to ameliorate the compatibility of the equipment for various sensitive receivers working around personal computers.","PeriodicalId":148043,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility (IEEE Cat. No.02TH8620)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130035504","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}