Proceedings of the International Conference on Electromagnetic Interference and Compatibility最新文献

{"title":"Generation of magnetic and electric field measurement and its analysis","authors":"S. Chattopadhyay","doi":"10.1109/ICEMIC.1999.871631","DOIUrl":"https://doi.org/10.1109/ICEMIC.1999.871631","url":null,"abstract":"With the proliferation of modern electronics circuits design concept, it has been found that it becomes more complex and operates in low frequency to high frequency. Consequently due to electronic component design and PCB layout and interconnection, some equipment generates an appreciable amount of magnetic field and electric field. To obtain its nature, level, and frequency component, it is necessary to develop a proper transducer, i.e. different types of antenna. This paper discusses the findings of sources of EMI design concept of such antenna, measurement technique and its characterization.","PeriodicalId":104361,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127618252","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 problems during system integration of a modern fighter aircraft-a case study","authors":"N.S. Chandrasekhar, T. Parthasarathy, P. Rao","doi":"10.1109/ICEMIC.1999.871598","DOIUrl":"https://doi.org/10.1109/ICEMIC.1999.871598","url":null,"abstract":"Summary form only given. A modern fighter aircraft is an electronics-intensive weapon platform with attendant EMI problems. The problem is exacerbated by the use of digital fly by wire flight control system, electronics nose wheel steering and brake management systems, and digital engine control systems. All these systems are safety critical and malfunctioning of these systems due to EMI from onboard electronics systems or due to external electromagnetic environment would lead to loss of aircraft. The Indian Light Combat Aircraft (LCA) which incorporates all the modern technologies has to be designed to ensure that the EMI problems are minimised. EMC engineering was adopted as part of the overall aircraft design, fabrication and testing. This includes formulation and implementation of a comprehensive EMI control plan incorporating various EMC guidelines at subsystem level and system level. Special EMC features include a hybrid grounding system using Single Ground Reference Point (SGRP) concept wherein the return current (power and signal) do not flow through the aircraft structure resulting in elimination of the troublesome common mode ground loop coupling at low frequencies. EMC analysis and prediction techniques were used at the early project definition phase for optimum location of all antennas to minimise mutual interference between various RF system onboard aircraft. Test Plan at LRU level conforming to MIL-STD-461C was strictly enforced and waivers were granted only after aircraft level analysis of the effect of waiver on other system. Aircraft level intra system and inter system EMC Tests are now in progress. As a result of systematic EMC analysis, design and test methodologies at various levels, very few EMI problems were observed during aircraft system integration and testing phase which is now in an advanced stage. However, a few problems which were discovered during the system integration were solved using the EMI Fix method. This paper describes the EMC design and analysis techniques adopted, the EMI tests conducted during the system integration phase of LCS, the EMI problems faced during the system integration, analysis of the problems and the solution to the EMI problems.","PeriodicalId":104361,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124446011","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":"Role of transient/surge suppressors in a typical airborne system. A case study","authors":"D. Suryanarayana, K. Nageswara Rao","doi":"10.1109/ICEMIC.1999.871627","DOIUrl":"https://doi.org/10.1109/ICEMIC.1999.871627","url":null,"abstract":"The increased use of electronic circuitry in the present warfare scenario, demands sophisticated systems with higher density integrated circuits with more accuracy and compact size. As the sophistication/complexity of the system increases their \"transient vulnerability\" also goes up. Most of the semiconductor devices and other sensitive electronic equipment are easily damaged with transients of high amplitude with fast rise time, with threshold energy levels in the range of microjoules and millijoules, originating from inductive switching loads, nuclear EMP, lightning EMP and ESD. Hence, it is very essential to protect the airborne systems from these \"unanticipated change in voltages\" (transients), by hardening the system input power supply lines, I/O data and communication lines utilizing various transient suppression techniques. In this paper the author discusses various transient suppression techniques to make the system immune to transients and also some of the practical EMI problems (transient related) are analyzed and solved during the EMI/EMC performance evaluation of electronic systems.","PeriodicalId":104361,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility","volume":"693 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116186254","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":"Power-frequency (ELF) electromagnetic fields in the studies of their hazardous effects on living beings","authors":"S. Bhargava","doi":"10.1109/ICEMIC.1999.871682","DOIUrl":"https://doi.org/10.1109/ICEMIC.1999.871682","url":null,"abstract":"Life on Earth is nearly completely dependent on electricity. Whilst this has revolutionized life of mankind, it has also posed the question of possible hazardous effects of electromagnetic fields (EMFs)-essentially associated with all current carrying circuits-on all living beings, including humans. The majority of studies of ill-effects of EMFs on humans have been revolving around the time varying (AC) EMFs of extremely low, or power, frequencies. However, no clear understanding of the cause-effect relationship of the phenomena has been established. In most cases the proper identification of source(s) of EMFs, their implications and basis of selection for a given study and experimental set-ups, as also the monitoring and measurement of fields, have not been properly discussed. This paper presents a comprehensive picture of the types of electric and magnetic fields at the power frequency-the causing factor. Then, the electromagnetic effect is explained in relation to the fundamental property of electromagnetic induction of all time-varying fields. A special feature of the paper is the details of a typical set-up used in an experimental study. The paper also lists the lacunae, and the various factors and parameters, that must be considered, especially in the Indian context, for fuller studies of EMFs vis-a-vis humans.","PeriodicalId":104361,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116856388","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":"Grounding-more than a connection to earth","authors":"H. W. Denny","doi":"10.1109/ICEMIC.1999.871667","DOIUrl":"https://doi.org/10.1109/ICEMIC.1999.871667","url":null,"abstract":"Grounding continues to be confusing to most engineers. The \"rules\" for grounding often are contradictory. The various rules were developed for specific electrical and communication systems. So long as these systems could be largely isolated from one another, both functionally and physically, the particular grounding rules could be relied upon. With the advent of the digital computer, the different electrically based systems have blended into complex arrays of cables and equipment. The grounding of these arrays must be approached electromagnetically rather than through the adherence to set rules, which may or may not be applicable.","PeriodicalId":104361,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124617562","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":"Improvement of shielding effectiveness of conductive composite for electromagnetic shielding","authors":"P. Sáha, Suad M. Hasan, A.Z. Alam","doi":"10.1109/ICEMIC.1999.871661","DOIUrl":"https://doi.org/10.1109/ICEMIC.1999.871661","url":null,"abstract":"This paper proposes a method to improve the shielding effectiveness (SE) of a regularly filled conductive plastic (RFCP) which is very similar to a dipole array like a frequency sensitive surface (FSS). In this work rectangular loop like filler is considered as a constituent of the filled conductive composite to provide conduction which results in absorption loss of the material to improve the SE value of the conductive composite. The SE value of RFCP is computed from the reflection loss which is determined from the reflection coefficient of the RFCP and absorption loss. Methods of computation of reflection coefficient and absorption loss are well described in this paper. The computed SE value is compared with the SE of available filled composite in which the fillers are randomly distributed and also with the regularly distributed flakes type filler. It has been found that in the microwave range RFCP exhibits a better SE value.","PeriodicalId":104361,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124807740","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-EMC studies on EMP protection system for fighting vehicles","authors":"A. Imayakumar, S. Satyamurthy, A. Devarpiran","doi":"10.1109/ICEMIC.1999.871592","DOIUrl":"https://doi.org/10.1109/ICEMIC.1999.871592","url":null,"abstract":"The EMP is required to be addressed properly for the fighting vehicles as it requires to be fully operational during and after these severe conditions. The use of proper design methodology to ensure that the system survives EMP and activates the crucial life support systems is discussed in this paper. The paper also discusses the EMP levels encountered during on board operation of such a system for fighting vehicle and methods that are adopted to bring them to safe levels along with test results done in house at CVRDE. These high intensity waves are detected at early stage to initiate preventive safe guard mechanism to the methods that could be employed to minimize the effects from this strong electromagnetic phenomena based on the present scenario.","PeriodicalId":104361,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129490429","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":"A peripheral port termination for EMI tests","authors":"B. Ashok Kumar, U. P. Nayak","doi":"10.1109/ICEMIC.1999.871638","DOIUrl":"https://doi.org/10.1109/ICEMIC.1999.871638","url":null,"abstract":"While conducting EMI tests on equipment containing output ports, it is required that the output ports are loaded at the time of carrying out the tests. For EMI tests on PCs the peripheral ports require to be loaded with the appropriate peripheral. The printer port of the PC requires to be loaded with a printer. Since the Centronics port has been standardized for PCs equipped with a parallel port for a printer, it is necessary to load this port with a Centronics printer. When a printer is connected to the port during the conduct of the EMI test, it is difficult to differentiate the EMI generated by the PC, from that generated by the printer. Consequently it is not possible to quantify the EMI generated by the PC without recourse to software routines. It therefore becomes necessary to terminate the ports without additional EMI being generated. This paper describes the design of a termination for the Centronics port which will reduce the possibility of improper interpretation of the measurements obtained through EMI tests on PCs. This technique also helps to obtain repeatable results while testing PCs for EMI.","PeriodicalId":104361,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128701752","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":"Reduction of EMI from SMPS (switched mode power supplies) by resonance technique and its utilities in industrial process control instruments","authors":"R. Bera, J. Bera, A.K. Sen, P.R. Dasgupta","doi":"10.1109/ICEMIC.1999.871680","DOIUrl":"https://doi.org/10.1109/ICEMIC.1999.871680","url":null,"abstract":"EMI restricts automation of the process control industries. A method of solving EMI problems by using a SMPS power supply and resonating it at high frequency is described. At the same time use of resonance mode SMPS helps by provide advantages of higher efficiency (95%), less heat dissipation, reliability of operation and compactness. This paper is the outcome during development and maintenance of microcontroller based process control instruments for Nalco, Orissa.","PeriodicalId":104361,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132141278","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":"Transient response of electronic devices and their failure mechanism","authors":"S. Tyagi","doi":"10.1109/ICEMIC.1999.871691","DOIUrl":"https://doi.org/10.1109/ICEMIC.1999.871691","url":null,"abstract":"The paper presents the failure mechanism of some of the commonly used components in electronic systems when transients appear upon them. It is estimated theoretically that low power transistors and microwave mixer diode are most susceptible to incoming transients with energy of the order of 1 /spl mu/J or even less.","PeriodicalId":104361,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125457819","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}