M.K. Aravind, T. Parthasarathy, P. Rao, D. C. Pande
{"title":"Inter system EMC tests on Indian Light Combat Aircraft","authors":"M.K. Aravind, T. Parthasarathy, P. Rao, D. C. Pande","doi":"10.1109/ICEMIC.2002.1006522","DOIUrl":"https://doi.org/10.1109/ICEMIC.2002.1006522","url":null,"abstract":"System level EMI/EMC tests were carried out on the Indian Light Combat Aircraft (LCA) prior to its maiden flight. This paper discusses the various aspects of testing, execution and performance of the system level EMI/EMC tests on LCA.","PeriodicalId":148043,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility (IEEE Cat. No.02TH8620)","volume":"10 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":"116912087","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}
Devender, K. Nageswara Rao, K. Suryanarayana, S. Sarvade, D. Ramesh
{"title":"Electromagnetic interference (EMI) suppression techniques - a case study","authors":"Devender, K. Nageswara Rao, K. Suryanarayana, S. Sarvade, D. Ramesh","doi":"10.1109/ICEMIC.2002.1006494","DOIUrl":"https://doi.org/10.1109/ICEMIC.2002.1006494","url":null,"abstract":"This paper discusses typical electromagnetic interference (EMI) problems encountered in airborne/ground subsystems during EMI/EMC performance evaluation for conducted emission, radiated emission and conducted susceptibility tests. It also highlights different suppression techniques, followed in hardening the units by selecting proper EMI power line filters, using appropriate shielding aids, good grounding practices and transient protection devices to achieve electromagnetic compatibility (EMC) in all the equipment to meet the test requirements. Finally the test results along with the specification limits are also given.","PeriodicalId":148043,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility (IEEE Cat. No.02TH8620)","volume":"10 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":"125529941","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}
M. Rath, T.R. Rammohan, S. Sudarsan, T.N. Pranesha
{"title":"Effect of inter-channel interference on IP traffic over WDM backbone networks","authors":"M. Rath, T.R. Rammohan, S. Sudarsan, T.N. Pranesha","doi":"10.1109/ICEMIC.2002.1006485","DOIUrl":"https://doi.org/10.1109/ICEMIC.2002.1006485","url":null,"abstract":"Convergence is forcing the network operating and switching speeds to Gigabit and more. WDM networks are becoming the de facto standard for IP backbone networks as they overcome the EMI issues associated with EM channels and switches. With its large bandwidth handling capabilities, the concept of IP traffic over optical WDM networks has become one of the most challenging topics to be considered. The issues arising out of mapping IP packets directly into WDM links using point-to-point protocol (PPP) encapsulation are discussed. While the magnitudes of EMI problems reduce with WDM, it emerges in a different form, albeit with lesser magnitude. One such challenge is the inter-channel interference (ICI), which is caused by non-linear effects of fiber focuses on the four-wave mixing (FWM) effect, which in turn affect the performance of the IP packet transmission. The characteristics of IP packet error is evaluated in terms of IP load, input light signal power and channel spacing. This paper suggests a possible solution to control the IP traffic load and improve channel spacing without affecting the overall network performance.","PeriodicalId":148043,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility (IEEE Cat. No.02TH8620)","volume":"15 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":"115520126","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":"EMI hardening of systems offered to Bharat Sanchar Nigam Limited (DoT): a case study","authors":"K. Suryanarayana, S. Satav, S. Sarvade","doi":"10.1109/ICEMIC.2002.1006492","DOIUrl":"https://doi.org/10.1109/ICEMIC.2002.1006492","url":null,"abstract":"The significance of electromagnetic compatibility (EMC) at a time when information technology has become a daily necessity is mandatory. In India, many organisations now made it mandatory for EMC certification of procured systems. BSNL (formally Department of Telecommunication) is such an organisation. RCI is engaged in EMC certification of various products according to applicable standards. In this paper, the authors present case studies which show how classical EMI hardening techniques like grounding, shielding and filtering can be used to achieve EMC in final products.","PeriodicalId":148043,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility (IEEE Cat. No.02TH8620)","volume":"261 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":"116075435","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":"Electromagnetic interference by high power microwaves","authors":"G. V. Rao, A. Roy, A.S. Paithankar, P. Ron","doi":"10.1109/ICEMIC.2002.1006455","DOIUrl":"https://doi.org/10.1109/ICEMIC.2002.1006455","url":null,"abstract":"High power microwave (HPM) radiation with frequency>1 GHz may penetrate electronic systems through front or backdoor openings and propagate like the genuine signal. Sometimes parasitic resonance may amplify the HPM signal and cause havoc to these systems. The surface currents caused by HPM can also interfere with the normal signals and upset the functioning of devices. The HPM incident upon electronic components may damage them through mechanisms like adiabatic heating of the junction or punch-through of the depletion layer. High power microwave radiation generation studies were performed using the intense electron beam from the KALI-1000 Pulse Accelerator by the virtual cathode oscillator method. Various axial resonant cavities were used to optimise the microwave emission. A maximum power of 500 MW around 5 GHz was generated by using an axial resonant cavity with a resonant frequency of 5 GHz. The HPM was also used to study the effects on some electronic devices. The HPM caused damage to the op-amps and stopped the functioning of the personal computers. The HPM can also cause breakdown in the low-pressure devices like hydrogen thyratrons and cause spurious triggering in the control circuits that use them.","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":"129447372","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}
M. Jain, L. Vidyasagar, N.H. Rajashekhar, T. Ramamohan, T.N. Pranesh
{"title":"ATM protocol adaptation for EMI/EMC environment","authors":"M. Jain, L. Vidyasagar, N.H. Rajashekhar, T. Ramamohan, T.N. Pranesh","doi":"10.1109/ICEMIC.2002.1006486","DOIUrl":"https://doi.org/10.1109/ICEMIC.2002.1006486","url":null,"abstract":"Traditionally telecommunication networks are primarily circuit switching based with variety of protocols developed specifically to have call control while computer networks are packet switching based with specific protocols for having traffic control and packet routing. However, in the context of evolving high performance network as objective the assessment of the suitability of conventionally evolved protocol needs to be done. As user applications also will use this type of network infrastructure hence suitably adapted form of existing protocols are to be used by them. This will ensure compatibility with existing protocols at the same time will provide immunity against electromagnetic interference by interconnecting heterogeneous media. The communication system at each end can be branched into classical 7 layers OSI model with transactions being done between peer entities. The electromagnetic interference in the interconnecting media directly affects the physical layer but indirectly all upper layers also. It causes different types of error patterns to be introduced in the physical layer bit streams. These error patterns are to be analyzed to quantify their effect on the communication system. Various classical channel models viz., Poisson, Neymann Pearson, Pareto, Markov etc. can emulate various segments of the interconnecting media thereby giving fairly good Idea of error pattern behavior at physical layer. This information is useful in selecting suitable FEC with interleaver so as to have very less residual error out of physical layer at other end. Still upper layers are affected because of this residual error. The paper focuses on the various issues concerning adaptation of ATM layers so that overall electromagnetic compatibility of the system can be achieved.","PeriodicalId":148043,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility (IEEE Cat. No.02TH8620)","volume":"6 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":"128085478","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":"Electromagnetic compatibility of digital communications for naval applications","authors":"A. Bhargava","doi":"10.1109/ICEMIC.2002.1006474","DOIUrl":"https://doi.org/10.1109/ICEMIC.2002.1006474","url":null,"abstract":"Digital communication has proliferated in a big way in the previous years. The advantages of digital communication are improved efficiency, better transmission accuracy, better noise immunity, requirement of lesser bandwidth, secrecy, and standardisation of transmission/reception equipment. Digital communication in a shipboard application is used for transmission of voice, data and picture between ships in an operational environment where accuracy, secrecy and immunity to noise/interference is essential. The advent of latest equipment capable of advanced signal processing techniques will result in prolific use of digital communication in shipboard applications. The paper aims at bringing out various aspects of digital communication vis-&-vis the dense electromagnetic environment that exists on a naval platform and their compatibility. The use and applicability of source coding, digital modulation techniques, error control coding and data security in mitigating the electromagnetic interference in a ship borne environment are discussed. The various problems of cochannel/adjacent channel interference and the effect of random/burst noise on a digital communication system are also brought out. Achieving immunity of digital communication to interference by use of various spread spectrum techniques is also discussed.","PeriodicalId":148043,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility (IEEE Cat. No.02TH8620)","volume":"16 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":"133372305","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":"Issues and concerns in using composites for spacecraft structures","authors":"S. Nagesh, S. Shastry, V.K. Harijaran, VR Kattim","doi":"10.1109/ICEMIC.2002.1006470","DOIUrl":"https://doi.org/10.1109/ICEMIC.2002.1006470","url":null,"abstract":"Several problem areas that are associated with the use of composites in spacecraft structures have been highlighted. In particular, the problem of controlling static-charge build-up on composites has been analyzed in some detail.","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":"133590719","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":"Conducted noise compliance through good filter design","authors":"S. Chand, A. Sachdeva","doi":"10.1109/ICEMIC.2002.1006525","DOIUrl":"https://doi.org/10.1109/ICEMIC.2002.1006525","url":null,"abstract":"The personal computer is becoming an important item for the domestic and industrial sector. Computing devices need good regulated power supplies. Power supply could be linear or switching. But due to certain advantages of SMPS, it is preferred for usage in all computing devices. Yet compared to a linear power supply, SMPS generates higher EMI noise because of switching devices. This noise may affect the performance of products in the vicinity. To suppress these noises a low pass filter is used. The design of an EMI filter for SMPS depends upon a lot of factors such as impedance of filter, frequency of emitted noise/fundamental frequency and suppression requirements. This paper describes the techniques for design of filter for compliance purposes and throws light over comparison of the theoretical values with reference to practical suppression.","PeriodicalId":148043,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility (IEEE Cat. No.02TH8620)","volume":"58 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":"133251414","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":"Channel characterization of mobile signal at 11 GHz","authors":"K. Ravindra, A. D. Sarma","doi":"10.1109/ICEMIC.2002.1006473","DOIUrl":"https://doi.org/10.1109/ICEMIC.2002.1006473","url":null,"abstract":"For effective mobile satellite communications system design, it is necessary to know quantitatively the channel characteristics such as signal fading due to multipath. Such characteristics can be studied by the statistical distribution of the received signal envelope. A polynomial model is proposed to estimate the path loss of the mobile signals at 11 GHz. Also, variability of the probability density function (PDF) of the received signal power on various parameters has been investigated. The polynomial model for path loss agrees well with the measured data. The investigations on the channel characterization estimate the PDF of the channel for a variety of statistical parameters, which are directly useful for mobile system designers.","PeriodicalId":148043,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility (IEEE Cat. No.02TH8620)","volume":"76 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":"115329428","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}