Pub Date : 1989-09-08DOI: 10.1109/ISEMC.1989.240865
T. Aida, Y. Enokida, H. Kawakami, K. Uchimura
A newly fabricated multiplex output circuit (output interface circuit system) was connected to the PIO of an 8-bit single-board microcomputer. Using this the system more than eight actuators can be operated. In order to avoid conduction noise induced in this system, the Z80 microcomputer is isolated from actuators such as rotatory solenoids by using photocouplers between them.<>
{"title":"Multiplex output system for increasing number of the actuators connected to 8 bits-single-board-microcomputer","authors":"T. Aida, Y. Enokida, H. Kawakami, K. Uchimura","doi":"10.1109/ISEMC.1989.240865","DOIUrl":"https://doi.org/10.1109/ISEMC.1989.240865","url":null,"abstract":"A newly fabricated multiplex output circuit (output interface circuit system) was connected to the PIO of an 8-bit single-board microcomputer. Using this the system more than eight actuators can be operated. In order to avoid conduction noise induced in this system, the Z80 microcomputer is isolated from actuators such as rotatory solenoids by using photocouplers between them.<<ETX>>","PeriodicalId":294014,"journal":{"name":"1989 International Symposium on Electromagnetic Compatibility","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114428973","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 : 1989-09-08DOI: 10.1109/ISEMC.1989.240862
F. Bevacqua, E. Cipollone, A. Morviducci, L. Venditti
Summary form only given. The tempest problem concerning commercial computing devices has been considered. A device for computer information capture through electromagnetic emission reception has been examined. The fundamentals and the characteristics of a device capable of damaging computing equipment through electromagnetic coupling have been investigated. Some experimental data have been obtained and a tentative theoretical analysis of the sources of emission has been performed. The characteristics of a safety shielded ambient have been elucidated.<>
{"title":"Shielded enclosures design for EM data safety","authors":"F. Bevacqua, E. Cipollone, A. Morviducci, L. Venditti","doi":"10.1109/ISEMC.1989.240862","DOIUrl":"https://doi.org/10.1109/ISEMC.1989.240862","url":null,"abstract":"Summary form only given. The tempest problem concerning commercial computing devices has been considered. A device for computer information capture through electromagnetic emission reception has been examined. The fundamentals and the characteristics of a device capable of damaging computing equipment through electromagnetic coupling have been investigated. Some experimental data have been obtained and a tentative theoretical analysis of the sources of emission has been performed. The characteristics of a safety shielded ambient have been elucidated.<<ETX>>","PeriodicalId":294014,"journal":{"name":"1989 International Symposium on Electromagnetic Compatibility","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127823097","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 : 1989-09-08DOI: 10.1109/ISEMC.1989.240864
Jialu Zhou, X. Shen, Fahua Lin
The pulse response of an amplitude probability distribution (APD) meter is obtained by computer simulation. It is shown that the absolute pulse response of the APD meter complies with the CISPR recommendation for EMI measuring apparatus, but its relative pulse response does not comply with the CISPR recommendation when the repetition frequency of the periodic pulses is lower than 2 Hz. Computation results show that, in order to reduce the deviation between the pulse response of the APD meter and CISPR specification, the sampling frequency has to be high enough for the envelope mode of operation.<>
{"title":"The pulse response of the APD meter","authors":"Jialu Zhou, X. Shen, Fahua Lin","doi":"10.1109/ISEMC.1989.240864","DOIUrl":"https://doi.org/10.1109/ISEMC.1989.240864","url":null,"abstract":"The pulse response of an amplitude probability distribution (APD) meter is obtained by computer simulation. It is shown that the absolute pulse response of the APD meter complies with the CISPR recommendation for EMI measuring apparatus, but its relative pulse response does not comply with the CISPR recommendation when the repetition frequency of the periodic pulses is lower than 2 Hz. Computation results show that, in order to reduce the deviation between the pulse response of the APD meter and CISPR specification, the sampling frequency has to be high enough for the envelope mode of operation.<<ETX>>","PeriodicalId":294014,"journal":{"name":"1989 International Symposium on Electromagnetic Compatibility","volume":"161 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114478928","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 : 1989-09-08DOI: 10.1109/ISEMC.1989.240866
Xiao-Ding Cai
Summary form only given, as follows. Using the Green's function/variational formulation with new form of charge distribution expressions for the characteristic impedance and electric field were obtained for an asymmetric TEM (transverse electromagnetic) cell. A series of computer programs has been developed to implement an optimum design of the E-field distribution.<>
{"title":"Analysis of longitudinal characteristics TEM cells","authors":"Xiao-Ding Cai","doi":"10.1109/ISEMC.1989.240866","DOIUrl":"https://doi.org/10.1109/ISEMC.1989.240866","url":null,"abstract":"Summary form only given, as follows. Using the Green's function/variational formulation with new form of charge distribution expressions for the characteristic impedance and electric field were obtained for an asymmetric TEM (transverse electromagnetic) cell. A series of computer programs has been developed to implement an optimum design of the E-field distribution.<<ETX>>","PeriodicalId":294014,"journal":{"name":"1989 International Symposium on Electromagnetic Compatibility","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133253103","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 : 1989-09-08DOI: 10.1109/ISEMC.1989.240860
K. Venskauskas, V. V. Krestianinov
An approach to the optimization of the arrangement of antennas and the topside design on ships based on the use of the method of moments is proposed. To obtain recommendations on the mutual arrangement of antennas and topside design on ships, computer-aided techniques and results of ship measurements have been extensively utilized.<>
{"title":"Improvements of the characteristics of electromagnetic compatibility of ship's radiocommunication equipment due to the optimization of arrangement of antennas on ships","authors":"K. Venskauskas, V. V. Krestianinov","doi":"10.1109/ISEMC.1989.240860","DOIUrl":"https://doi.org/10.1109/ISEMC.1989.240860","url":null,"abstract":"An approach to the optimization of the arrangement of antennas and the topside design on ships based on the use of the method of moments is proposed. To obtain recommendations on the mutual arrangement of antennas and topside design on ships, computer-aided techniques and results of ship measurements have been extensively utilized.<<ETX>>","PeriodicalId":294014,"journal":{"name":"1989 International Symposium on Electromagnetic Compatibility","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121828457","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 : 1989-09-08DOI: 10.1109/ISEMC.1989.240858
N. Soliman, W. Boerner
It is pointed out that the major difficulty of evaluating possible practical applications of vector diffraction tomography is that experimental data are still sparse, and the data generated usually involve either the Born or Rytov scalar wave approximations. In order to test the depolarizing effects in electromagnetic wave diffraction tomography, the complete vector wave equation needs to be inverted, which at the current state-of-the-art still cannot be done. Instead, for the inverse problem of image formation, oblique incidence on a circular cylindrical scatterer is investigated. It is shown that, due to depolarizing effects, reconstructions of the exact fields at oblique incidence deteriorate rapidly as the angle of incidence deviates further from normal incidence. These reconstructions are investigated.<>
{"title":"The depolarization term in vector (polarization) diffraction tomography and its importance in microwave imaging","authors":"N. Soliman, W. Boerner","doi":"10.1109/ISEMC.1989.240858","DOIUrl":"https://doi.org/10.1109/ISEMC.1989.240858","url":null,"abstract":"It is pointed out that the major difficulty of evaluating possible practical applications of vector diffraction tomography is that experimental data are still sparse, and the data generated usually involve either the Born or Rytov scalar wave approximations. In order to test the depolarizing effects in electromagnetic wave diffraction tomography, the complete vector wave equation needs to be inverted, which at the current state-of-the-art still cannot be done. Instead, for the inverse problem of image formation, oblique incidence on a circular cylindrical scatterer is investigated. It is shown that, due to depolarizing effects, reconstructions of the exact fields at oblique incidence deteriorate rapidly as the angle of incidence deviates further from normal incidence. These reconstructions are investigated.<<ETX>>","PeriodicalId":294014,"journal":{"name":"1989 International Symposium on Electromagnetic Compatibility","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125789996","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 : 1989-09-08DOI: 10.1109/ISEMC.1989.240859
K. Ohnuma, R. Sato
Results on the realization of a programmable signal source which can be used to simulate the noise present in visual communication equipment is presented. The source is capable of generating impulsive, burst, and continuous pseudorandom noise with three designated statistical characteristics: noise duration period distribution (NDPD), noise-free period distribution (NFPD), and amplitude probability distribution within a noise duration period (NAPD). The trial-manufactured pseudonoise simulator was able to generate, as requested, wideband signals which continuously included constant magnitude spectra over a commercial video frequency bandwidth. The simulator is currently being used to assess a pseudonoise source for subjective evaluation tests with a view to studying the TV picture degradation effects associated with amplitude and time probability distribution characteristics of burst or impulsive noise.<>
{"title":"Realization of a programmable pseudorandom noise source","authors":"K. Ohnuma, R. Sato","doi":"10.1109/ISEMC.1989.240859","DOIUrl":"https://doi.org/10.1109/ISEMC.1989.240859","url":null,"abstract":"Results on the realization of a programmable signal source which can be used to simulate the noise present in visual communication equipment is presented. The source is capable of generating impulsive, burst, and continuous pseudorandom noise with three designated statistical characteristics: noise duration period distribution (NDPD), noise-free period distribution (NFPD), and amplitude probability distribution within a noise duration period (NAPD). The trial-manufactured pseudonoise simulator was able to generate, as requested, wideband signals which continuously included constant magnitude spectra over a commercial video frequency bandwidth. The simulator is currently being used to assess a pseudonoise source for subjective evaluation tests with a view to studying the TV picture degradation effects associated with amplitude and time probability distribution characteristics of burst or impulsive noise.<<ETX>>","PeriodicalId":294014,"journal":{"name":"1989 International Symposium on Electromagnetic Compatibility","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114985020","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 : 1989-09-08DOI: 10.1109/ISEMC.1989.240863
L. Vegni, P. Pacini
The problem of the numerical evaluation of the coupling among the electromagnetic fields generated by two-aperture antennas is considered. The theoretical method used is based on plane-wave scattering theory, leading to a very efficient formula of the evaluation of the electromagnetic coupling coefficient. Results of a computer simulation are presented for the case of two rectangular/circular aperture antennas working in the X-band. Numerical computations have been performed by neglecting the evanescent part of the plane-wave spectrum. This assumption and the corresponding numerical evaluations are observed to be consistent with the results found in the literature.<>
{"title":"An efficient computation of the electromagnetic mutual coupling between two aperture antennas","authors":"L. Vegni, P. Pacini","doi":"10.1109/ISEMC.1989.240863","DOIUrl":"https://doi.org/10.1109/ISEMC.1989.240863","url":null,"abstract":"The problem of the numerical evaluation of the coupling among the electromagnetic fields generated by two-aperture antennas is considered. The theoretical method used is based on plane-wave scattering theory, leading to a very efficient formula of the evaluation of the electromagnetic coupling coefficient. Results of a computer simulation are presented for the case of two rectangular/circular aperture antennas working in the X-band. Numerical computations have been performed by neglecting the evanescent part of the plane-wave spectrum. This assumption and the corresponding numerical evaluations are observed to be consistent with the results found in the literature.<<ETX>>","PeriodicalId":294014,"journal":{"name":"1989 International Symposium on Electromagnetic Compatibility","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117308463","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 : 1989-09-08DOI: 10.1109/ISEMC.1989.240867
D. V. Wilesov, A. Worshevsky
The EMC training of electrical engineers who work on shipboard electrical and electronic equipment is discussed. It is noted that lectures, laboratory exercises, and personal computer simulation give students the necessary knowledge and skill. The computer simulation of transients, noise, induced voltages in shipboard electric system, surge propagation in cables, transformers, and filters is suitable for EMC training and engineering calculations. Laboratory exercises help students acquire skill in measuring, testing, and estimating solutions.<>
{"title":"EMC training of electrical engineers","authors":"D. V. Wilesov, A. Worshevsky","doi":"10.1109/ISEMC.1989.240867","DOIUrl":"https://doi.org/10.1109/ISEMC.1989.240867","url":null,"abstract":"The EMC training of electrical engineers who work on shipboard electrical and electronic equipment is discussed. It is noted that lectures, laboratory exercises, and personal computer simulation give students the necessary knowledge and skill. The computer simulation of transients, noise, induced voltages in shipboard electric system, surge propagation in cables, transformers, and filters is suitable for EMC training and engineering calculations. Laboratory exercises help students acquire skill in measuring, testing, and estimating solutions.<<ETX>>","PeriodicalId":294014,"journal":{"name":"1989 International Symposium on Electromagnetic Compatibility","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114708089","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 : 1989-09-08DOI: 10.1109/ISEMC.1989.240861
F. Bevacqua, E. Cipollone, A. Morviducci, L. Venditti
Summary form only given. The effects of lightning on magnetic storage media (tapes, floppy disks, hard disks) and computing equipment have been studied. An analysis of the source energy in the time-frequency dimensions has been conducted in order to define the different relevant paths of the coupling with the media and equipment. An extensive analysis is conducted on shielding solutions.<>
{"title":"Lightning hazard and data safety","authors":"F. Bevacqua, E. Cipollone, A. Morviducci, L. Venditti","doi":"10.1109/ISEMC.1989.240861","DOIUrl":"https://doi.org/10.1109/ISEMC.1989.240861","url":null,"abstract":"Summary form only given. The effects of lightning on magnetic storage media (tapes, floppy disks, hard disks) and computing equipment have been studied. An analysis of the source energy in the time-frequency dimensions has been conducted in order to define the different relevant paths of the coupling with the media and equipment. An extensive analysis is conducted on shielding solutions.<<ETX>>","PeriodicalId":294014,"journal":{"name":"1989 International Symposium on Electromagnetic Compatibility","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132524221","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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