1986 IEEE International Symposium on Electromagnetic Compatibility最新文献

{"title":"Surveillance Testing Ensures EMP Hardness of Military Systems","authors":"T. Buckman, J. Knighten, R. Stewart, A. Trippe","doi":"10.1109/ISEMC.1986.7568293","DOIUrl":"https://doi.org/10.1109/ISEMC.1986.7568293","url":null,"abstract":"Nuclear detonations cause short-lived, intense (e.g., 50 kV/m) electrom agnetic fields over very large areas. Coupling of these fields to electronics can cause upset and/or burnout of components. New military systems require surviv­ ability to EMP in a vein similar to other environmental con­ siderations. Hardening/protection of electronics is accom ­ plished with the use of a variety of specialized components and mitigation techniques. This presentation addresses the develop­ ment and fielding of an instrumentation system and an improved test methodology for assessing the EMP hardness of a military system or facility. Proper operation of most EMP protective measures are not verifiable during normal operations, and thus require special hardness surveillance (HS) activities as a part of hardness maintenance. The development of a cost-effec tive EMP HS measurement set is the culmination of a number of Government and industry EMP testing programs extending over a period of more than a decade. The MIDAS-700 is a self-contained, mobile, integrated data, acquisition system which advances the EMP HS technology. It was specifically developed as a flexible measurement set which can evaluate all types of EMP protec­ tion measures, rapidly, a t low cost and with a minimum of downtime on the system under test. A MIDAS-700 is currently deployed in Europe in support of a NATO test program to perform verification testing, and to establish hardness maintenance baselines on key NATO groundbased facilities. This presentation includes an account of the operational characteristics of MIDAS-700 during this exten­ sive set of surveillance tests. Background Recent modifications to Department of Defense policy regulations require that military systems which perform critical missions in nuclear conflicts must include survivability and hardness features. Most newly developed and deployed systems include nuclear survivability as part of their performance specification. Once a system is deployed, commanders may be required to provide periodic evaluations of the level o f surviv­ ability of equipment for which they are responsible. Nuclear detonations produce short-lived, intense (e.g., 50 kV/m) electrom agnetic fields over very large area. Unlike the thermal and blast e ffects of a detonation which cause damage over ranges of a few miles, EMP effec ts from a high-altitude detonation may be experienced hundreds to thousands of miles from the point of detonation (Figure 1). The EMP fields generate currents and voltages which can cause disruption, upset and component damage within electronic systems. Most new military systems require survivability to EMP. Hardening or protection of electronics is accomplished with a variety of specialized components and mitigation techniques which include electromagnetic shielding, filtering and transient protection. However, these hardening measures can be degraded during the deployment and operation of a system. Degradation can result from w","PeriodicalId":244612,"journal":{"name":"1986 IEEE International Symposium on Electromagnetic Compatibility","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122709226","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":"Shielding Effectiveness Measurements with a Dual Tem Cell and a Split TEM Cell","authors":"S. Kashyap","doi":"10.1109/ISEMC.1986.7568251","DOIUrl":"https://doi.org/10.1109/ISEMC.1986.7568251","url":null,"abstract":"","PeriodicalId":244612,"journal":{"name":"1986 IEEE International Symposium on Electromagnetic Compatibility","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127763186","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":"International EMC Co-Operation in the Military Area","authors":"N. Carter","doi":"10.1109/ISEMC.1986.7568200","DOIUrl":"https://doi.org/10.1109/ISEMC.1986.7568200","url":null,"abstract":"","PeriodicalId":244612,"journal":{"name":"1986 IEEE International Symposium on Electromagnetic Compatibility","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121040064","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":"The RF Absorber Horn Test System","authors":"L. Hemming, G. A. Sanchez","doi":"10.1109/ISEMC.1986.7568228","DOIUrl":"https://doi.org/10.1109/ISEMC.1986.7568228","url":null,"abstract":"The RF Absorber Horn Test System The RF Absorber Horn Test System facilitates the measurement of high performance RF anechoic chamber absorbers over the 100 MHz to 18 GHz frequency range. Absorber reflectivity measurements as low as -50 dB are possible at normal incidence with practical sized samples. The test system consists of a square horn lined with high loss wedge absorber driven by a tapered horn section lined with flat high loss absorber. The ta­ pered section is fed by an electrically small source antenna and the square section houses a directional probe antenna which is moved longitudinally along the axis of the horn to detect the standing wave created by the electromagnetic wave reflecting from the test sam­ ple mounted in the end of the square horn and the uniform incident wave formed by the tapered horn at the source end. The measurement system and how it functions are detailed, and examples of measured and reduced data are given.","PeriodicalId":244612,"journal":{"name":"1986 IEEE International Symposium on Electromagnetic Compatibility","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126818958","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":"Use of Synthesized System Models and Frequency-Distance Criteria for a Parameter Sensitive Interference Prediction Model Developed for Tactical Radio Environment","authors":"Lt Col P S Gill","doi":"10.1109/ISEMC.1986.7568239","DOIUrl":"https://doi.org/10.1109/ISEMC.1986.7568239","url":null,"abstract":"The mathematical interference predic­ tion model based on synthesised transmitter and receiver response has been developed to evaluate the Frequency-Distance (F—D ) separation criteria for electromagnetic compatibility for tactical radio 130-1000MHz) environment. The synthesised modulation envelope at the fundamental tuned frequency of culprit emitter is also transferred to harmonically/sub harmonically related frequencies of culprit emitter to construct the composite emission spectra. The slope for fall of power per decade for harmonics/ sub harmonics is synthesised. The value of spurious emission level taken from technical literature is modified to take care of worst deviation. In an exactly similar fashion the victim receptor response spectra is synthesised. The culprit emission spectra and victim response spectra are graphically convolved to find the off-frequency rejec­ tion potential of the victim receptor to unwanted signal. For many emitter/receptor combination the F-D templates are super­ imposed for predicting compatibility. The model is parameter sensitive. The synthesi­ sed slopes when replaced with measured slopes will reduce the statistical deviations. The model utilises the statistical descriptions of the individual contributors of interference, Peculiarities of Co-Site Situation And Mobile Tactical Environments The fluid situations in mobile battle­ field scenario coupled with probabilistic nature of various parameters of potential sources of Electromagnetic Interference make the analysis and prediction task very cumbersome and complex. The complexity is increased further by the very fact that it is difficult to pin-point exact location of emitters/receptors, antenna heights, antenna beamings and power output in case of variable output facility provided to counter EGM. Hence the analysis and prediction by dynamic changes as a result of contingency planning when superimposed on planned connectivity will have to be based on worst case analysis. The worst co-site problem implies that antennas may be in each others fresnel region or induction field. The high power environments (like radars) complicate the situation by making receptors and emitters to operate in non-linear mode. The worst case co-site situation and high power environments result in interactions like Intermodulation, Desehsitization, Cross Modulation and Spurious emissions/responses. All these interactions contribute to inter­ rering power levels which vary considerably, necessitating statistical approach. These interactions can occur simultaneously thus complicating the Analysis problem. The front-end-burn-outs, case penetrations and radiations from local oscillator are not considered. The above mentioned problems were catalytic in evolving a composite spectra approach for analysing complex pro­ blems and predicting frequency-distance criteria for Electromagnetic Compatibility. Basic Concepts of F-D Model Fundamental-Emission Modulation Envelope, The transmitter fundam","PeriodicalId":244612,"journal":{"name":"1986 IEEE International Symposium on Electromagnetic Compatibility","volume":"222 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122361434","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":"Tasks and Work of CISPR Subcommittee B - Interference from ISM Equipment","authors":"A. Whitehouse","doi":"10.1109/ISEMC.1986.7568220","DOIUrl":"https://doi.org/10.1109/ISEMC.1986.7568220","url":null,"abstract":"","PeriodicalId":244612,"journal":{"name":"1986 IEEE International Symposium on Electromagnetic Compatibility","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133843487","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":"The Work of The CISPR on Interference Characteristics of Information Technology Equipment","authors":"R.J. Trigg","doi":"10.1109/ISEMC.1986.7568225","DOIUrl":"https://doi.org/10.1109/ISEMC.1986.7568225","url":null,"abstract":"","PeriodicalId":244612,"journal":{"name":"1986 IEEE International Symposium on Electromagnetic Compatibility","volume":"33 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120815614","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":"Choice of Rational Methods for Digital Information Transmission over HF Radiocommunication Links","authors":"A.I. Kushtuev, M. P. Morozov","doi":"10.1109/ISEMC.1986.7568284","DOIUrl":"https://doi.org/10.1109/ISEMC.1986.7568284","url":null,"abstract":"","PeriodicalId":244612,"journal":{"name":"1986 IEEE International Symposium on Electromagnetic Compatibility","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121293247","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 Method of Characterizing ELF and VLF Electromagnetic Emissions from Video Display Terminals","authors":"J. Flinn","doi":"10.1109/ISEMC.1986.7568256","DOIUrl":"https://doi.org/10.1109/ISEMC.1986.7568256","url":null,"abstract":"","PeriodicalId":244612,"journal":{"name":"1986 IEEE International Symposium on Electromagnetic Compatibility","volume":"194 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115985199","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":"Measurement of Seam Impedances of Tactical Shelters for Threat Level NEMP Simulation","authors":"P. Papazian, R. Perala, C. C. Easterbrook, P. McKenna","doi":"10.1109/ISEMC.1986.7568279","DOIUrl":"https://doi.org/10.1109/ISEMC.1986.7568279","url":null,"abstract":"These cases effectively can be reduced to two extremes, resistive seams and inductive slots. The excitation of these seams and slots occurs via the externally incident fields. Modeling of shelter shielding effectiveness and internal fields can then be viewed as a two stage process. First external incident fields and current densities are calculated for the 3D shelter and incident field waveform. Then the assumption for internal numerical modeling is that the excitation at any point along a seam is directly related to the current across the seam in the direction it would flow on a continuous sheet. The constant of proportionality being the seam impedance. Currents flowing horizontally along the seam are neglected.","PeriodicalId":244612,"journal":{"name":"1986 IEEE International Symposium on Electromagnetic Compatibility","volume":"220 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122515032","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}