Pub Date : 1979-10-01DOI: 10.1109/ISEMC.1979.7568779
C. L. Smith
In considering the problem of the response of a set of whips or monopole-type structures to an. EMP event, it is not always possible to neglect the interaction of nearby elements. Situations where mutual interaction must be considered occur where a large number of antennas are installed in close proximity as on board a ship and in circular arrays. Other possibilities are the "Antenna Farm" and a parking lot where there are light poles relatively near one another. This paper develops the theory for determining the open circuit voltages and short circuit currents for such a collection of "antennas" with special attention to the Circularly Disposed Array Antenna (CDAA) or Wullenweber. In most instances, the effects of interaction of nearby objects with an antenna in the presence of an EMP event may be neglected without serious error. However, in some cases, the field itself is quite well defined, more so than is the case of the "statistical event" used in most EMP assessments, and the elements of the victim field are sufficiently close that strong interactions may be expected. It is the latter situation which has recently become of interest and to which the methods outlined in this paper are directed. The solution is given in the frequency domain, but may be readily converted to the time domain by well-known methods.
{"title":"EMP Response Prediction for Closely Spaced Monopole-Type Structures","authors":"C. L. Smith","doi":"10.1109/ISEMC.1979.7568779","DOIUrl":"https://doi.org/10.1109/ISEMC.1979.7568779","url":null,"abstract":"In considering the problem of the response of a set of whips or monopole-type structures to an. EMP event, it is not always possible to neglect the interaction of nearby elements. Situations where mutual interaction must be considered occur where a large number of antennas are installed in close proximity as on board a ship and in circular arrays. Other possibilities are the \"Antenna Farm\" and a parking lot where there are light poles relatively near one another. This paper develops the theory for determining the open circuit voltages and short circuit currents for such a collection of \"antennas\" with special attention to the Circularly Disposed Array Antenna (CDAA) or Wullenweber. In most instances, the effects of interaction of nearby objects with an antenna in the presence of an EMP event may be neglected without serious error. However, in some cases, the field itself is quite well defined, more so than is the case of the \"statistical event\" used in most EMP assessments, and the elements of the victim field are sufficiently close that strong interactions may be expected. It is the latter situation which has recently become of interest and to which the methods outlined in this paper are directed. The solution is given in the frequency domain, but may be readily converted to the time domain by well-known methods.","PeriodicalId":283257,"journal":{"name":"1979 IEEE International Symposium on Electromagnetic Compatibility","volume":"172 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124749899","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 : 1979-10-01DOI: 10.1109/ISEMC.1979.7568800
J. Brettle, M. Baskerville
The requirements for reliable low impedance electrical bonds in aircraft are discussed. The problems of making bonds and the often competing requirements of corrosion protection and low interface resistance are described. Some preliminary results on the electrical properties of carbon fibre composite (CFC) materials and bonding of CFC are presented.
{"title":"Electrical Bonding in Aircraft","authors":"J. Brettle, M. Baskerville","doi":"10.1109/ISEMC.1979.7568800","DOIUrl":"https://doi.org/10.1109/ISEMC.1979.7568800","url":null,"abstract":"The requirements for reliable low impedance electrical bonds in aircraft are discussed. The problems of making bonds and the often competing requirements of corrosion protection and low interface resistance are described. Some preliminary results on the electrical properties of carbon fibre composite (CFC) materials and bonding of CFC are presented.","PeriodicalId":283257,"journal":{"name":"1979 IEEE International Symposium on Electromagnetic Compatibility","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123959180","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 : 1979-10-01DOI: 10.1109/ISEMC.1979.7568784
D. Bodnar, H. W. Denny, B. M. Jenkins
A specialized test fixture for measuring the shielding effectiveness of conductively loaded plastic panels was designed and constructed. This fixture is described in detail. With this fixture, the shielding effectiveness of several test panels was measured over the frequency range of 10 MHz to 1000 MHz. Typical results are presented.
{"title":"Shielding Effectiveness Measurements on Conductive Plastics","authors":"D. Bodnar, H. W. Denny, B. M. Jenkins","doi":"10.1109/ISEMC.1979.7568784","DOIUrl":"https://doi.org/10.1109/ISEMC.1979.7568784","url":null,"abstract":"A specialized test fixture for measuring the shielding effectiveness of conductively loaded plastic panels was designed and constructed. This fixture is described in detail. With this fixture, the shielding effectiveness of several test panels was measured over the frequency range of 10 MHz to 1000 MHz. Typical results are presented.","PeriodicalId":283257,"journal":{"name":"1979 IEEE International Symposium on Electromagnetic Compatibility","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122113860","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 : 1979-10-01DOI: 10.1109/ISEMC.1979.7568827
D. A. Bull, B. W. Smithers
Interactions between co-sited antennas on airframes can seriously limit the performance of control, guidance and communications systems. Much ground and in-flight data has been gathered and laboratory investigations have indicated where improvements can be made. Empirical formulae have been developed which are applicable for both in-band and out-of-band frequencies.
{"title":"Antenna-to-Antenna Coupling in Aircraft Radio Systems","authors":"D. A. Bull, B. W. Smithers","doi":"10.1109/ISEMC.1979.7568827","DOIUrl":"https://doi.org/10.1109/ISEMC.1979.7568827","url":null,"abstract":"Interactions between co-sited antennas on airframes can seriously limit the performance of control, guidance and communications systems. Much ground and in-flight data has been gathered and laboratory investigations have indicated where improvements can be made. Empirical formulae have been developed which are applicable for both in-band and out-of-band frequencies.","PeriodicalId":283257,"journal":{"name":"1979 IEEE International Symposium on Electromagnetic Compatibility","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121719848","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 : 1979-10-01DOI: 10.1109/ISEMC.1979.7568856
Jack Hafer
This paper establishes test methods and procedures used to characterize the response of an Electroexplosive Subsystem (EES) when placed in an RF field in the frequency range of 250 kHz to 40 GHz. The complete test program consists of various tests required to collect the incremental results. The various tests may be performed in any order. RF impedance measurements are performed on each bridgewire of the electroexplosive device (EED) as a means of determining test frequencies.
{"title":"A Technique for Evaluating an Electroexplosive Subsystem Performance when Placed in an Electromagnetic Field","authors":"Jack Hafer","doi":"10.1109/ISEMC.1979.7568856","DOIUrl":"https://doi.org/10.1109/ISEMC.1979.7568856","url":null,"abstract":"This paper establishes test methods and procedures used to characterize the response of an Electroexplosive Subsystem (EES) when placed in an RF field in the frequency range of 250 kHz to 40 GHz. The complete test program consists of various tests required to collect the incremental results. The various tests may be performed in any order. RF impedance measurements are performed on each bridgewire of the electroexplosive device (EED) as a means of determining test frequencies.","PeriodicalId":283257,"journal":{"name":"1979 IEEE International Symposium on Electromagnetic Compatibility","volume":"152 12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125895237","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 : 1979-10-01DOI: 10.1109/ISEMC.1979.7568825
G. Capraro, C. Paul
A study of the feasibility of developing a wire routing algorithm to minimize wire-coupled interference is discussed. An optimal wire routing algorithm is presented which generates a wire bundle (harness) configuration that minimizes the wire-coupled interference and satisfies certain physical constraints such as allowable bundle segment paths. The wire coupling model and the compatibility criteria are also discussed. It is shown that the optimal wire routing problem can be reduced to an iterative tree building algorithm. Implementation of the algorithm for a digital computer is briefly discussed and an example is presented.
{"title":"Design of Wire Routing for EMC","authors":"G. Capraro, C. Paul","doi":"10.1109/ISEMC.1979.7568825","DOIUrl":"https://doi.org/10.1109/ISEMC.1979.7568825","url":null,"abstract":"A study of the feasibility of developing a wire routing algorithm to minimize wire-coupled interference is discussed. An optimal wire routing algorithm is presented which generates a wire bundle (harness) configuration that minimizes the wire-coupled interference and satisfies certain physical constraints such as allowable bundle segment paths. The wire coupling model and the compatibility criteria are also discussed. It is shown that the optimal wire routing problem can be reduced to an iterative tree building algorithm. Implementation of the algorithm for a digital computer is briefly discussed and an example is presented.","PeriodicalId":283257,"journal":{"name":"1979 IEEE International Symposium on Electromagnetic Compatibility","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129778829","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 : 1979-10-01DOI: 10.1109/ISEMC.1979.7568833
M. Lustgarten
Results of measurements of receiver intermodulation products are reviewed. A large number of products were identified, many of which could result in degradation of performance of communications receivers collocated with transmitters using the same or adjacent tuning ranges. Probable mechanisms are described and suggestions provided for ranking the relative significance of the various interactions.
{"title":"Significant Receiver Intermodulation (RIM) Products","authors":"M. Lustgarten","doi":"10.1109/ISEMC.1979.7568833","DOIUrl":"https://doi.org/10.1109/ISEMC.1979.7568833","url":null,"abstract":"Results of measurements of receiver intermodulation products are reviewed. A large number of products were identified, many of which could result in degradation of performance of communications receivers collocated with transmitters using the same or adjacent tuning ranges. Probable mechanisms are described and suggestions provided for ranking the relative significance of the various interactions.","PeriodicalId":283257,"journal":{"name":"1979 IEEE International Symposium on Electromagnetic Compatibility","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125756402","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 : 1979-10-01DOI: 10.1109/ISEMC.1979.7568813
G. Kunkel
The effects which corrosion can have on a gasketed joint is documented. This documentation is in the form of illustrating previous published work and the results of moisture and salt spray tests which were performed on gasketed joints. The results include conclusions and recommendations based upon the referenced previously published information and the testing reported in the paper. The recommendations list a series of gasket materials and surface plating which can be successfully used without experiencing excessive corrosion as a function of the required environment and level of shielding.
{"title":"Corrosion Effects on EMI Gasketed Joints","authors":"G. Kunkel","doi":"10.1109/ISEMC.1979.7568813","DOIUrl":"https://doi.org/10.1109/ISEMC.1979.7568813","url":null,"abstract":"The effects which corrosion can have on a gasketed joint is documented. This documentation is in the form of illustrating previous published work and the results of moisture and salt spray tests which were performed on gasketed joints. The results include conclusions and recommendations based upon the referenced previously published information and the testing reported in the paper. The recommendations list a series of gasket materials and surface plating which can be successfully used without experiencing excessive corrosion as a function of the required environment and level of shielding.","PeriodicalId":283257,"journal":{"name":"1979 IEEE International Symposium on Electromagnetic Compatibility","volume":"270 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120898066","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 : 1979-10-01DOI: 10.1109/ISEMC.1979.7568838
J. Caldwell, J. Rockway, G. Stanley, M. Roney
Two recent developments in Navy spectrum management systems will give both the afloat and ashore community a quantum increase in their management of their communication assets in a limited frequency asset environment. The principal intent of both systems was the automation of those functions which either involved tedious and rote manual operations or involved complicated computational capability and are therefore often ignored. The creative thought of the system still rests with the communicator. The emphasis was on local, limited scale computational support as opposed to the centralized accessed large scale computer.
{"title":"New Developments in Navy Spectrum Management Systems","authors":"J. Caldwell, J. Rockway, G. Stanley, M. Roney","doi":"10.1109/ISEMC.1979.7568838","DOIUrl":"https://doi.org/10.1109/ISEMC.1979.7568838","url":null,"abstract":"Two recent developments in Navy spectrum management systems will give both the afloat and ashore community a quantum increase in their management of their communication assets in a limited frequency asset environment. The principal intent of both systems was the automation of those functions which either involved tedious and rote manual operations or involved complicated computational capability and are therefore often ignored. The creative thought of the system still rests with the communicator. The emphasis was on local, limited scale computational support as opposed to the centralized accessed large scale computer.","PeriodicalId":283257,"journal":{"name":"1979 IEEE International Symposium on Electromagnetic Compatibility","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131603847","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 : 1979-10-01DOI: 10.1109/ISEMC.1979.7568782
Albert R. Martin, Steven E. Emert
In this paper, we discuss a revised triaxial method for testing the shielding effectiveness of long cables. Using this method, measurements show that the commonly accepted rule that doubling cable length decreases the shielding effectiveness by half (6db) holds only for a very special case. In general this rule is not even approximately true, and data are given to illustrate the point. Finally, reasons for the failure of the doubling law are briefly discussed.
{"title":"Shielding Effectiveness of Long Cables","authors":"Albert R. Martin, Steven E. Emert","doi":"10.1109/ISEMC.1979.7568782","DOIUrl":"https://doi.org/10.1109/ISEMC.1979.7568782","url":null,"abstract":"In this paper, we discuss a revised triaxial method for testing the shielding effectiveness of long cables. Using this method, measurements show that the commonly accepted rule that doubling cable length decreases the shielding effectiveness by half (6db) holds only for a very special case. In general this rule is not even approximately true, and data are given to illustrate the point. Finally, reasons for the failure of the doubling law are briefly discussed.","PeriodicalId":283257,"journal":{"name":"1979 IEEE International Symposium on Electromagnetic Compatibility","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133071864","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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