Pub Date : 1978-06-01DOI: 10.1109/ISEMC.1978.7566862
R. Hess
When an aircraft encounters lightning, the resulting transients that appear on aircraft wiring contain several components. This paper discusses the interrelation between the length of a thin-wire scatterer and the magnitude and waveshape of the current induced on the scatterer by the EM field of a fixed waveshape, relatively slow rise time, double exponential EMP.
{"title":"Properties of Induced Transients Associated with EM Fields Produced by Lightning or Other Relatively Slow Rise-Time EMP","authors":"R. Hess","doi":"10.1109/ISEMC.1978.7566862","DOIUrl":"https://doi.org/10.1109/ISEMC.1978.7566862","url":null,"abstract":"When an aircraft encounters lightning, the resulting transients that appear on aircraft wiring contain several components. This paper discusses the interrelation between the length of a thin-wire scatterer and the magnitude and waveshape of the current induced on the scatterer by the EM field of a fixed waveshape, relatively slow rise time, double exponential EMP.","PeriodicalId":377995,"journal":{"name":"1978 IEEE International Symposium on Electromagnetic Compatibility","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128943526","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 : 1978-06-01DOI: 10.1109/ISEMC.1978.7566850
L. Hemming
S e r i o u s measurement problems a r e e n c o u n t e r e d when r a d i a t e d EMI measurements a r e c o n d u c t e d w i t h i n s h i e l d e d rooms. T h is p a p e r d e s c r i b e s a t e s t sy s te m t o e v a l u a t e t h e u s e f u l n e s s o f newly d e v e lo p e d RF a b s o r b e r m a t e r i a l s and room d e s i g n s t o improve t h e a c c u r a c y o f t h e v a r i o u s r a d i a t e d EMI measurement p r o c e d u r e s used w i t h i n s h i e l d e d rooms. P r e l i m i n a r y d a t a i s g i ve n on t h e f i e l d d i s t r i b u t i o n s t h a t a r e found when c o n d u c t i n g t h e MIL-STD-461/462 and P a r t 15 F .C.C . /C ISP R t e s t p r o c e d u r e s w i t h i n s h i e l d e d rooms w i t h and w i t h o u t two ty p e s o f RF a b s o r b e r on t h e i n t e r i o r s u r f a c e s o f t h e t e s t e n c l o s u r e .
S和r或S /测量a r和c或u t和r和d when a - t和d d EMI measurements a r和c或d u c t和d w t h i n S h d和l e d室。T h is p p和r d和d b r c T和s T sy s和s - l u T m T和v和T h和u和f u l n和s或f newly d v和p和d、a b s o r b和r m a T和r - s和p room d和s g n s T或改进T h和c u r a c y或f T h和a r或s - d T r和d c和d的EMI测量p r或r和s used w T h - i n s h d和l e d室。P r和l m n r y a d d g n t h和f和l d i s t r b P r s t u h a r和招领when c或d u c t n g t h e MIL-STD-461/462 and P a r t f . c . c . 15ISP / C R t和s t u R o C和d - R和s w t h i n d h d和l e d室w i t h和w i t h或u t“ty p和s或f、a b C R b和R s t h和n t和R或R s u R f C和d或f t h和t和s t和C或s u R。
{"title":"A Test System for Evaluating New Developments in RF Absorbing Materials for Radiated EMI Measurements","authors":"L. Hemming","doi":"10.1109/ISEMC.1978.7566850","DOIUrl":"https://doi.org/10.1109/ISEMC.1978.7566850","url":null,"abstract":"S e r i o u s measurement problems a r e e n c o u n t e r e d when r a d i a t e d EMI measurements a r e c o n d u c t e d w i t h i n s h i e l d e d rooms. T h is p a p e r d e s c r i b e s a t e s t sy s te m t o e v a l u a t e t h e u s e f u l n e s s o f newly d e v e lo p e d RF a b s o r b e r m a t e r i a l s and room d e s i g n s t o improve t h e a c c u r a c y o f t h e v a r i o u s r a d i a t e d EMI measurement p r o c e d u r e s used w i t h i n s h i e l d e d rooms. P r e l i m i n a r y d a t a i s g i ve n on t h e f i e l d d i s t r i b u t i o n s t h a t a r e found when c o n d u c t i n g t h e MIL-STD-461/462 and P a r t 15 F .C.C . /C ISP R t e s t p r o c e d u r e s w i t h i n s h i e l d e d rooms w i t h and w i t h o u t two ty p e s o f RF a b s o r b e r on t h e i n t e r i o r s u r f a c e s o f t h e t e s t e n c l o s u r e .","PeriodicalId":377995,"journal":{"name":"1978 IEEE International Symposium on Electromagnetic Compatibility","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117209519","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 : 1978-06-01DOI: 10.1109/ISEMC.1978.7566894
A. Farrar, B. Watson, A. Adams
A new method for evaluating the free space im pedance functions which appear in the method of mements for linear and aperture antennas is described. The results are simple expressions in closed form suitable for machine computation. The impedance functions were evaluated using two computer programs. The calculated results are in good agreement with existing data. Computation time is short and the results are accurate.
{"title":"A Simple Model for Radiation and Scattering from Wires and Surfaces","authors":"A. Farrar, B. Watson, A. Adams","doi":"10.1109/ISEMC.1978.7566894","DOIUrl":"https://doi.org/10.1109/ISEMC.1978.7566894","url":null,"abstract":"A new method for evaluating the free space im pedance functions which appear in the method of mements for linear and aperture antennas is described. The results are simple expressions in closed form suitable for machine computation. The impedance functions were evaluated using two computer programs. The calculated results are in good agreement with existing data. Computation time is short and the results are accurate.","PeriodicalId":377995,"journal":{"name":"1978 IEEE International Symposium on Electromagnetic Compatibility","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125637418","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 : 1978-06-01DOI: 10.1109/ISEMC.1978.7566879
D. V. Gonshor
Several articles have been published^ over the past few years cautioning designers not to rely on insertion loss data for filters derived by the methods of MIL-STD-220A.2 Filters employed in actual applica tions may behave quite differently than in a 50-ohm system. In addition, insertion loss may change as a result of saturation of ferrite elements or devaluation of capacitive elements at high temperature. The ef fects of these nonideal conditions on the performance of a typical pi-section filter pin have been investi gated. The techniques presented here may be used to evaluate other types of filter pins or, possibly, gen eral types of filters. However, particular attention must be paid to distributed parameter impedance or electromagnetic resonance effects which may not be significant in the compact filter pin, but may play a vital role in other filters.
{"title":"Filter Pin Insertion Loss Under Nonideal Conditions","authors":"D. V. Gonshor","doi":"10.1109/ISEMC.1978.7566879","DOIUrl":"https://doi.org/10.1109/ISEMC.1978.7566879","url":null,"abstract":"Several articles have been published^ over the past few years cautioning designers not to rely on insertion loss data for filters derived by the methods of MIL-STD-220A.2 Filters employed in actual applica tions may behave quite differently than in a 50-ohm system. In addition, insertion loss may change as a result of saturation of ferrite elements or devaluation of capacitive elements at high temperature. The ef fects of these nonideal conditions on the performance of a typical pi-section filter pin have been investi gated. The techniques presented here may be used to evaluate other types of filter pins or, possibly, gen eral types of filters. However, particular attention must be paid to distributed parameter impedance or electromagnetic resonance effects which may not be significant in the compact filter pin, but may play a vital role in other filters.","PeriodicalId":377995,"journal":{"name":"1978 IEEE International Symposium on Electromagnetic Compatibility","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132148589","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 : 1978-06-01DOI: 10.1109/ISEMC.1978.7566849
C. Kendall, R. T. Hebson
{"title":"Microfiltering of Input/Output Cables: A New Solution to High Frequency I/O Cable Radiation and Susceptibility Fields","authors":"C. Kendall, R. T. Hebson","doi":"10.1109/ISEMC.1978.7566849","DOIUrl":"https://doi.org/10.1109/ISEMC.1978.7566849","url":null,"abstract":"","PeriodicalId":377995,"journal":{"name":"1978 IEEE International Symposium on Electromagnetic Compatibility","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134396035","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 : 1978-06-01DOI: 10.1109/ISEMC.1978.7566840
E. E. Donaldson
Measurements were conducted to define the suscep tibility of television and AM/FM receivers to high pow er electromagnetic fields. Fifty television receivers and twenty AM/FM receivers, representing different manufacturers, chassis configurations, and circuit fea tures, were subjected to pulsed UHF and S-band fields 2 2 at peak field strengths up to 38 dBm/m and 54 dBm/m , respectively. The susceptibility of the test specimen receivers was determined using the threshold of inter ference criterion, i.e., as that field strength which produced a detectable effect in receiver operation. Measurement results show that the average UHF and S-band interference thresholds for the test specimen television 2 2 receivers were approximately +30 dBm/m and +35 dBm/m , respectively. For the AM/FM receivers, the average UHF 2 and S-band thresholds were approximately +7 dBm/m and 2 +20 dBm/m , respectively. The interference thresholds for individual receivers varied as much as 40 dB between different samples.
{"title":"Susceptibility of Home Entertainment Equipment to High Power Interference","authors":"E. E. Donaldson","doi":"10.1109/ISEMC.1978.7566840","DOIUrl":"https://doi.org/10.1109/ISEMC.1978.7566840","url":null,"abstract":"Measurements were conducted to define the suscep tibility of television and AM/FM receivers to high pow er electromagnetic fields. Fifty television receivers and twenty AM/FM receivers, representing different manufacturers, chassis configurations, and circuit fea tures, were subjected to pulsed UHF and S-band fields 2 2 at peak field strengths up to 38 dBm/m and 54 dBm/m , respectively. The susceptibility of the test specimen receivers was determined using the threshold of inter ference criterion, i.e., as that field strength which produced a detectable effect in receiver operation. Measurement results show that the average UHF and S-band interference thresholds for the test specimen television 2 2 receivers were approximately +30 dBm/m and +35 dBm/m , respectively. For the AM/FM receivers, the average UHF 2 and S-band thresholds were approximately +7 dBm/m and 2 +20 dBm/m , respectively. The interference thresholds for individual receivers varied as much as 40 dB between different samples.","PeriodicalId":377995,"journal":{"name":"1978 IEEE International Symposium on Electromagnetic Compatibility","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125885269","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 : 1978-06-01DOI: 10.1109/ISEMC.1978.7566845
G. Sellers, J. Dismukes, Y. Shiau, J. J. Krstansky, R. Sharp, J. Kincaid
Low f r e q u e n c y , magne t ic f i e l d p ic kup in cab les is a severe EMI prob lem. To t e s t the e f f e c t i v e n e s s o f f e r r o m a g n e t i c , amorphous metal a l l o y r ibbons in reducing t h i s problem, b ra id e d s h i e l d s were f a b r i c a t e d and mea sured over the f i e l d s t r e n g t h range 0.01 10 Oers ted a t 60 Hz and 400 Hz. Resu l t s show s h i e l d i n g e f f e c t i v e ness in the range 25 dB wh ich i s comparable to b la ck i r o n p ip e , w h i l e a t the same t im e the b ra id s a re f l e x i b l e and l i g h t in w e ig h t .
驾驶室中的低磁场磁性元件是一个严重的电磁干扰问题。为了减少这一问题，我们在 60 赫兹和 400 赫兹的频率范围 0.01 10 Oers ted 上对非晶态金属磁性元件进行了测量。结果表明，在 25 dB 的范围内，声音的强度与 b la ck i r o n p ip e 相当，而在同一时间内，b ra id s 的声音强度较低，而且声音较小。
{"title":"Flexible Braids for Improved Magnetic Shielding of Cables","authors":"G. Sellers, J. Dismukes, Y. Shiau, J. J. Krstansky, R. Sharp, J. Kincaid","doi":"10.1109/ISEMC.1978.7566845","DOIUrl":"https://doi.org/10.1109/ISEMC.1978.7566845","url":null,"abstract":"Low f r e q u e n c y , magne t ic f i e l d p ic kup in cab les is a severe EMI prob lem. To t e s t the e f f e c t i v e n e s s o f f e r r o m a g n e t i c , amorphous metal a l l o y r ibbons in reducing t h i s problem, b ra id e d s h i e l d s were f a b r i c a t e d and mea sured over the f i e l d s t r e n g t h range 0.01 10 Oers ted a t 60 Hz and 400 Hz. Resu l t s show s h i e l d i n g e f f e c t i v e ness in the range 25 dB wh ich i s comparable to b la ck i r o n p ip e , w h i l e a t the same t im e the b ra id s a re f l e x i b l e and l i g h t in w e ig h t .","PeriodicalId":377995,"journal":{"name":"1978 IEEE International Symposium on Electromagnetic Compatibility","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128487722","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 : 1978-06-01DOI: 10.1109/ISEMC.1978.7566833
P. Madle
{"title":"Introduction to Field Penetration","authors":"P. Madle","doi":"10.1109/ISEMC.1978.7566833","DOIUrl":"https://doi.org/10.1109/ISEMC.1978.7566833","url":null,"abstract":"","PeriodicalId":377995,"journal":{"name":"1978 IEEE International Symposium on Electromagnetic Compatibility","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114370958","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 : 1978-06-01DOI: 10.1109/ISEMC.1978.7566895
R. M. Swink
{"title":"An Applied Analytical Approach to the Coupling of RF Energy into a Cylindrical Enclosure","authors":"R. M. Swink","doi":"10.1109/ISEMC.1978.7566895","DOIUrl":"https://doi.org/10.1109/ISEMC.1978.7566895","url":null,"abstract":"","PeriodicalId":377995,"journal":{"name":"1978 IEEE International Symposium on Electromagnetic Compatibility","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132103496","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 : 1978-06-01DOI: 10.1109/ISEMC.1978.7566880
M. Stys, D. P. Griffin
The setup used to obtain the interface noise perfor mance data is shown in Figure 1. The frequencies of the square wave train transmitted through the interface are 100 KHz and 1 MHz. The driverreceiver combinations used are listed in Table I. The noise pulse waveform produced by the noise source is illustrated in Figure 2. These pulses were generated at 30 Hz and 60 Hz. The noise pulses were also synchronized to fire at various points on the square wave train being transmitted through the interface. Results
{"title":"The Response of Various Interface Configurations in the Presence of a Broadband High Impedance Noise Source","authors":"M. Stys, D. P. Griffin","doi":"10.1109/ISEMC.1978.7566880","DOIUrl":"https://doi.org/10.1109/ISEMC.1978.7566880","url":null,"abstract":"The setup used to obtain the interface noise perfor mance data is shown in Figure 1. The frequencies of the square wave train transmitted through the interface are 100 KHz and 1 MHz. The driverreceiver combinations used are listed in Table I. The noise pulse waveform produced by the noise source is illustrated in Figure 2. These pulses were generated at 30 Hz and 60 Hz. The noise pulses were also synchronized to fire at various points on the square wave train being transmitted through the interface. Results","PeriodicalId":377995,"journal":{"name":"1978 IEEE International Symposium on Electromagnetic Compatibility","volume":"54 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126028260","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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