Pub Date : 1900-01-01DOI: 10.1109/ICEMIC.1999.871653
K.-D. Gopel
Digital mobile telephones have to be tested on EMC emission and immunity. In Europe the ETSI product family standards define the test methods and limits for these measurements. Very often the manufacturer is also interested in the antenna characteristics of the mobile telephone. Therefore the question arises, how far an existing EMC test facility can be used for additional antenna measurements. A further problem is that a typical antenna measurement setup can not be used when the antenna is an integrated antenna which does not provide a defined RF interface connector. The paper describes the possible measurement methods, test setups and requirements to make antenna measurements on digital mobile telephones. It also gives some information on the extension of an existing EMC facility to an antenna measurement site and its limitations.
{"title":"EMC and antenna measurements of digital mobile telephones","authors":"K.-D. Gopel","doi":"10.1109/ICEMIC.1999.871653","DOIUrl":"https://doi.org/10.1109/ICEMIC.1999.871653","url":null,"abstract":"Digital mobile telephones have to be tested on EMC emission and immunity. In Europe the ETSI product family standards define the test methods and limits for these measurements. Very often the manufacturer is also interested in the antenna characteristics of the mobile telephone. Therefore the question arises, how far an existing EMC test facility can be used for additional antenna measurements. A further problem is that a typical antenna measurement setup can not be used when the antenna is an integrated antenna which does not provide a defined RF interface connector. The paper describes the possible measurement methods, test setups and requirements to make antenna measurements on digital mobile telephones. It also gives some information on the extension of an existing EMC facility to an antenna measurement site and its limitations.","PeriodicalId":104361,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility","volume":"31 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":"132268096","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 : 1900-01-01DOI: 10.1109/ICEMIC.1999.871585
N. K. Agarwal
Modern launch vehicles, and spacecraft carry complex sophisticated onboard electronic systems. The special features of such systems are diversified functions, use of wide range of spectrum and high density packaging. These factors may give rise to interference problems which can result from delays to even total mission failures. Hence, ensuring electromagnetic compatibility (EMC) is an essential part of the overall design and development efforts of spacecraft and launch vehicle electronic systems. The paper briefly describes engineering and management requirements of EMC programme of space systems. It first describes how to establish systems EMC requirements followed by EMC specifications generation, design techniques and test requirements. The paper then deals with electrostatic problems in spacecraft and role ad requirement of analysis programme. Lastly, EMC management aspects are briefly described.
{"title":"EMI control in high reliability space systems","authors":"N. K. Agarwal","doi":"10.1109/ICEMIC.1999.871585","DOIUrl":"https://doi.org/10.1109/ICEMIC.1999.871585","url":null,"abstract":"Modern launch vehicles, and spacecraft carry complex sophisticated onboard electronic systems. The special features of such systems are diversified functions, use of wide range of spectrum and high density packaging. These factors may give rise to interference problems which can result from delays to even total mission failures. Hence, ensuring electromagnetic compatibility (EMC) is an essential part of the overall design and development efforts of spacecraft and launch vehicle electronic systems. The paper briefly describes engineering and management requirements of EMC programme of space systems. It first describes how to establish systems EMC requirements followed by EMC specifications generation, design techniques and test requirements. The paper then deals with electrostatic problems in spacecraft and role ad requirement of analysis programme. Lastly, EMC management aspects are briefly described.","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":"128678064","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 : 1900-01-01DOI: 10.1109/ICEMIC.1999.871608
N. Sarma, A. D. Sarma
An algorithm is developed based on uniform geometric theory of diffraction (UTD) for the analysis of an antenna mounted on a rocket shaped structure. Yu and Burnside (1972) elevation plane theory is extended, so that analysis can be done even if the source is located on other parts of the structure. The theory is validated with Ryan's (1972) result which is based on estimation of magnetic edge currents at junctions. The radiation patterns in the roll and azimuth planes are obtained using standard curved surface diffraction theory and agree well with published theoretical or experimental results.
{"title":"Principal plane analyses of a monopole antenna on a rocket shaped structure using UTD","authors":"N. Sarma, A. D. Sarma","doi":"10.1109/ICEMIC.1999.871608","DOIUrl":"https://doi.org/10.1109/ICEMIC.1999.871608","url":null,"abstract":"An algorithm is developed based on uniform geometric theory of diffraction (UTD) for the analysis of an antenna mounted on a rocket shaped structure. Yu and Burnside (1972) elevation plane theory is extended, so that analysis can be done even if the source is located on other parts of the structure. The theory is validated with Ryan's (1972) result which is based on estimation of magnetic edge currents at junctions. The radiation patterns in the roll and azimuth planes are obtained using standard curved surface diffraction theory and agree well with published theoretical or experimental results.","PeriodicalId":104361,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility","volume":"71 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":"130466578","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 : 1900-01-01DOI: 10.1109/ICEMIC.1999.871633
S. Sathyamurthy
An electro optical receiver intended for combat tank application, developed by IRDE, Deradhun, was subjected to a series of EMI/EMC evaluations at the test centre of CVRDE. This system briefly consists of a number of laser detector heads, a processing electronics box and a display unit. In the initial phase of the testing, the system failed in the immunity tests and also exhibited false triggering frequently. The whole layout was analysed reengineered and evaluated again as a subsystem independently and there after integration in the vehicle also. Details of EMI-EMC tests carried out, observations made and EMC design guidelines furnished to the subvendor are discussed briefly in this paper. After thorough reevalutions to validate the EMI hardening, the system was found acceptable and the EMC performance had improved much better. Salient features of the system and its EMI characteristics are presented.
{"title":"EMI immunity evaluation of an electro optical (laser) receiver","authors":"S. Sathyamurthy","doi":"10.1109/ICEMIC.1999.871633","DOIUrl":"https://doi.org/10.1109/ICEMIC.1999.871633","url":null,"abstract":"An electro optical receiver intended for combat tank application, developed by IRDE, Deradhun, was subjected to a series of EMI/EMC evaluations at the test centre of CVRDE. This system briefly consists of a number of laser detector heads, a processing electronics box and a display unit. In the initial phase of the testing, the system failed in the immunity tests and also exhibited false triggering frequently. The whole layout was analysed reengineered and evaluated again as a subsystem independently and there after integration in the vehicle also. Details of EMI-EMC tests carried out, observations made and EMC design guidelines furnished to the subvendor are discussed briefly in this paper. After thorough reevalutions to validate the EMI hardening, the system was found acceptable and the EMC performance had improved much better. Salient features of the system and its EMI characteristics are presented.","PeriodicalId":104361,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility","volume":"114 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":"117211845","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 : 1900-01-01DOI: 10.1109/ICEMIC.1999.871625
A. Sachdeva, S. Chand
Due to the ever increasing use of electronic gadgets in every walk of life, electromagnetic pollution is increasing day by day. This pollution may degrade the performance of electronic and electrical equipment. Conventional energy meters with moveable discs were previously used to register energy. But due to certain advantages of electronic techniques, these meters are being replaced by electronic meters. Electronic energy meters are very much vulnerable to EM noises and this might affect their performance and reliability. EMI/EMC evaluation has thus become necessary to ensure that these meters work satisfactorily in the present day environment. The paper discusses various available specifications for the EMC evaluation of energy meters and analyses the working environment of electronic energy meters. It also throws light on the probable EMI sources, their suppression and immunity improvement techniques for compliance of these meters to the national and international norms.
{"title":"EMC evaluation and analysis of electronic energy meter","authors":"A. Sachdeva, S. Chand","doi":"10.1109/ICEMIC.1999.871625","DOIUrl":"https://doi.org/10.1109/ICEMIC.1999.871625","url":null,"abstract":"Due to the ever increasing use of electronic gadgets in every walk of life, electromagnetic pollution is increasing day by day. This pollution may degrade the performance of electronic and electrical equipment. Conventional energy meters with moveable discs were previously used to register energy. But due to certain advantages of electronic techniques, these meters are being replaced by electronic meters. Electronic energy meters are very much vulnerable to EM noises and this might affect their performance and reliability. EMI/EMC evaluation has thus become necessary to ensure that these meters work satisfactorily in the present day environment. The paper discusses various available specifications for the EMC evaluation of energy meters and analyses the working environment of electronic energy meters. It also throws light on the probable EMI sources, their suppression and immunity improvement techniques for compliance of these meters to the national and international norms.","PeriodicalId":104361,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility","volume":"31 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":"115737471","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 : 1900-01-01DOI: 10.1109/ICEMIC.1999.871599
G.M. Rao, K. Srinivasa Rao, P. Misra
EMC problems are inherently associated with all modern electronic systems, in terms of unpredictable malfunctions, upset, impairment and destruction of sensitive components and at times unintentional spectrum pollution resulting in difficulties in maintaining normal telecommunications nearby. Vessels of all sizes are exposed to such pollution whereby the dual effects of EMI and EMR are countered. This paper discusses how EMI and EMR have a profound effect on the safety index of fishing vessels and the virtues of using EMC equivalent.
{"title":"EMR effects and EMC consideration for improving safety index of fishing vessels","authors":"G.M. Rao, K. Srinivasa Rao, P. Misra","doi":"10.1109/ICEMIC.1999.871599","DOIUrl":"https://doi.org/10.1109/ICEMIC.1999.871599","url":null,"abstract":"EMC problems are inherently associated with all modern electronic systems, in terms of unpredictable malfunctions, upset, impairment and destruction of sensitive components and at times unintentional spectrum pollution resulting in difficulties in maintaining normal telecommunications nearby. Vessels of all sizes are exposed to such pollution whereby the dual effects of EMI and EMR are countered. This paper discusses how EMI and EMR have a profound effect on the safety index of fishing vessels and the virtues of using EMC equivalent.","PeriodicalId":104361,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility","volume":"11 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":"131761271","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 : 1900-01-01DOI: 10.1109/ICEMIC.1999.871618
B. Chakravarti, M. Chakravarti
With the advent of the computer and fifty years of research into artificial intelligence programming techniques, the dream of smart machines has become a reality. The emphasis is not merely to process large quantities of data but rather to extract meaningful information from this data. Knowledge is stored in database and wisdom is used to make decisions. The key of success is our ability to associate information from a variety of different sources that may not have any obvious connection to one another but combine it in a way that provides us with some distinct benefit. Distributed computing and object oriented management systems provide necessary support to extract information easily and accurately so that decisions can be taken at once. The EMC scenario is changing rapidly and becoming more and more complex. The information available are so scattered that most of the time we are duplicating the work done by somebody already. Distributed computing and Internet technology are not being used properly to integrate this information for the benefit of the EMC society. This paper suggests how the latest technologies developed in the software field con be utilized to gather and correlate the information available in the field of EMC technology. Object oriented concepts can be used to extract the wisdom as naturally as the human brain and as easily as clicking the mouse button. This paper also discusses how a real world model con be very useful to depict the problem and suggests the necessary steps to process the information.
{"title":"Intelligence management of EMC control","authors":"B. Chakravarti, M. Chakravarti","doi":"10.1109/ICEMIC.1999.871618","DOIUrl":"https://doi.org/10.1109/ICEMIC.1999.871618","url":null,"abstract":"With the advent of the computer and fifty years of research into artificial intelligence programming techniques, the dream of smart machines has become a reality. The emphasis is not merely to process large quantities of data but rather to extract meaningful information from this data. Knowledge is stored in database and wisdom is used to make decisions. The key of success is our ability to associate information from a variety of different sources that may not have any obvious connection to one another but combine it in a way that provides us with some distinct benefit. Distributed computing and object oriented management systems provide necessary support to extract information easily and accurately so that decisions can be taken at once. The EMC scenario is changing rapidly and becoming more and more complex. The information available are so scattered that most of the time we are duplicating the work done by somebody already. Distributed computing and Internet technology are not being used properly to integrate this information for the benefit of the EMC society. This paper suggests how the latest technologies developed in the software field con be utilized to gather and correlate the information available in the field of EMC technology. Object oriented concepts can be used to extract the wisdom as naturally as the human brain and as easily as clicking the mouse button. This paper also discusses how a real world model con be very useful to depict the problem and suggests the necessary steps to process the information.","PeriodicalId":104361,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility","volume":"56 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":"126778331","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 : 1900-01-01DOI: 10.1109/ICEMIC.1999.871649
S. Baisakhiya, C. Subramanian, S.K. Das
The uptrend in the use of digital wireless communication system is well justified taking into account its inherent advantages. The Telecommunication Engineering Centre (TEC) has brought out a standard No.G/WLL-01/02 October 1997 on Digital Wireless Local Loop (WLL) system to provide two way communication for Department of Telecommunication (DoT) Customer Access Network. This standard lists the complete requirements the WLL system has to qualify. Electromagnetic compatibility (EMC) is one of the requirements. This paper presents a critical review of the EMC aspects of this standard. It describes the various electromagnetic disturbance phenomenon the WLL system is likely to encounter in the working environment. It suggests the other appropriate tests that need to be considered for inclusion in this standard.
{"title":"A review of TEC standard No.G/WLL-01/02 October '97 for digital wireless local loop system","authors":"S. Baisakhiya, C. Subramanian, S.K. Das","doi":"10.1109/ICEMIC.1999.871649","DOIUrl":"https://doi.org/10.1109/ICEMIC.1999.871649","url":null,"abstract":"The uptrend in the use of digital wireless communication system is well justified taking into account its inherent advantages. The Telecommunication Engineering Centre (TEC) has brought out a standard No.G/WLL-01/02 October 1997 on Digital Wireless Local Loop (WLL) system to provide two way communication for Department of Telecommunication (DoT) Customer Access Network. This standard lists the complete requirements the WLL system has to qualify. Electromagnetic compatibility (EMC) is one of the requirements. This paper presents a critical review of the EMC aspects of this standard. It describes the various electromagnetic disturbance phenomenon the WLL system is likely to encounter in the working environment. It suggests the other appropriate tests that need to be considered for inclusion in this standard.","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":"129668701","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 : 1900-01-01DOI: 10.1109/ICEMIC.1999.871628
H. Sirpal, B. D. Pandey
With the growing density of electrical and electronic systems onboard contemporary naval platforms, electromagnetic interference and compatibility aspects have acquired matters of great significance. A large number of equipment, emitting signals over a wide range of the electromagnetic spectrum, have to co-exist with sensitive surveillance systems covering the very same spectrum onboard a warship with limited real estate area. Further, in the process of continuous upgrading and modernisation of a warship required to keep abreast with emerging technologies, state of the art equipment are installed from time to time to augment/retrofit existing systems in the already dense EM environment onboard. This paper discusses the salient aspects of the evaluation process adopted for induction evaluation of new electrical/electronic equipment from the EMI/EMC point of view. A case study for evaluation of a new generation high power HF (1.5-30 MHz) transmitter has been illustrated to highlight the various inter-linked aspects in the evaluation process.
{"title":"EMC evaluation of a new induction equipment. A case study","authors":"H. Sirpal, B. D. Pandey","doi":"10.1109/ICEMIC.1999.871628","DOIUrl":"https://doi.org/10.1109/ICEMIC.1999.871628","url":null,"abstract":"With the growing density of electrical and electronic systems onboard contemporary naval platforms, electromagnetic interference and compatibility aspects have acquired matters of great significance. A large number of equipment, emitting signals over a wide range of the electromagnetic spectrum, have to co-exist with sensitive surveillance systems covering the very same spectrum onboard a warship with limited real estate area. Further, in the process of continuous upgrading and modernisation of a warship required to keep abreast with emerging technologies, state of the art equipment are installed from time to time to augment/retrofit existing systems in the already dense EM environment onboard. This paper discusses the salient aspects of the evaluation process adopted for induction evaluation of new electrical/electronic equipment from the EMI/EMC point of view. A case study for evaluation of a new generation high power HF (1.5-30 MHz) transmitter has been illustrated to highlight the various inter-linked aspects in the evaluation process.","PeriodicalId":104361,"journal":{"name":"Proceedings of the International Conference on Electromagnetic Interference and Compatibility","volume":"8 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":"125318589","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 : 1900-01-01DOI: 10.1109/ICEMIC.1999.871623
V. Dhar
Commercial international regulations/standards call for specific impulsive bandwidths to measure types of emission in the frequency range of interest. Such bandwidths are specified in International Special Committee on Radio Interference (CISPR) specification no. 16-1. When emissions exceed average regulatory limits, but remain below quasi-peak limits, average analysis is carried out. Averaging of EMI in a spectrum analyser (SA) is accomplished with a video filter. Selection of improper bandwidth of the video filter results in numerous errors. Subject analysis is required to be carried out in the linear amplitude mode of a SA. However if the logarithmic amplitude mode is selected, it may affect average analysis. The present paper intends to find the parameters which can influence conducted EMI average analysis.
{"title":"Conducted EMI analysis. A case study","authors":"V. Dhar","doi":"10.1109/ICEMIC.1999.871623","DOIUrl":"https://doi.org/10.1109/ICEMIC.1999.871623","url":null,"abstract":"Commercial international regulations/standards call for specific impulsive bandwidths to measure types of emission in the frequency range of interest. Such bandwidths are specified in International Special Committee on Radio Interference (CISPR) specification no. 16-1. When emissions exceed average regulatory limits, but remain below quasi-peak limits, average analysis is carried out. Averaging of EMI in a spectrum analyser (SA) is accomplished with a video filter. Selection of improper bandwidth of the video filter results in numerous errors. Subject analysis is required to be carried out in the linear amplitude mode of a SA. However if the logarithmic amplitude mode is selected, it may affect average analysis. The present paper intends to find the parameters which can influence conducted EMI average analysis.","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":"129060158","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}
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