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Criteria and designs for surge couplers and back-filters 浪涌耦合器和反向滤波器的标准和设计
National Symposium on Electromagnetic Compatibility Pub Date : 1989-05-23 DOI: 10.1109/NSEMC.1989.37180
P. Richman
{"title":"Criteria and designs for surge couplers and back-filters","authors":"P. Richman","doi":"10.1109/NSEMC.1989.37180","DOIUrl":"https://doi.org/10.1109/NSEMC.1989.37180","url":null,"abstract":"A review is presented of the principal areas in which surge coupling and filtering problems exist. It is proposed that each coupling mode be described in terms of the displacement of every line in the system with respect to ground. Rules are developed for specifying and designing surge coupling configurations, so that different surge test equipment can produce the same test results for a given piece of equipment under test (EUT). Three criteria are proposed, in the form of rules, as the basis for improved and better-standardized surge coupler/filters: surge the intended lines and no others; do not materially change the impedances driving EUT input lines; and allow at least some power follow.<<ETX>>","PeriodicalId":408694,"journal":{"name":"National Symposium on Electromagnetic Compatibility","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125342029","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}
引用次数: 5
Lightning protection testing of the E-6 wing tip antenna pod/HF probe E-6翼尖天线吊舱/高频探头防雷试验
National Symposium on Electromagnetic Compatibility Pub Date : 1989-05-23 DOI: 10.1109/NSEMC.1989.37152
G. L. Enochson, S. Kormanyos, V. Severson
{"title":"Lightning protection testing of the E-6 wing tip antenna pod/HF probe","authors":"G. L. Enochson, S. Kormanyos, V. Severson","doi":"10.1109/NSEMC.1989.37152","DOIUrl":"https://doi.org/10.1109/NSEMC.1989.37152","url":null,"abstract":"A brief summary is presented of lightning tests conducted on the US Navy E-6 aircraft wing tip antenna pod/HF probe in accordance with MIL-STD-1757 to demonstrate compliance with MIL-B-5087B lightning protection requirements. The tests were conducted on a 22 ft full-sized electrically representative model of the pod/HF probe. Three types of tests were conducted. Long arc attachment tests (MIL-STD-1757 test method T01) were performed to determine the lightning arc entry angle. Direct effects testing (method T02) was conducted to examine the extent of damage which could result from a direct attachment of a high-current lightning strike to the pod. Indirect effects testing (method T05) was conducted to assess the voltage levels induced on equipment cables that result from lightning strike attachment. The waveforms applied, test article configurations, and current injection points were chosen to represent worst-case conditions. Test operations and test results are discussed.<<ETX>>","PeriodicalId":408694,"journal":{"name":"National Symposium on Electromagnetic Compatibility","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114650639","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}
引用次数: 0
Cross-talk and ringing on a multilayer PCB 多层PCB上的串音和振铃
National Symposium on Electromagnetic Compatibility Pub Date : 1989-05-23 DOI: 10.1109/NSEMC.1989.37205
J. Poltz, A. Wexler
{"title":"Cross-talk and ringing on a multilayer PCB","authors":"J. Poltz, A. Wexler","doi":"10.1109/NSEMC.1989.37205","DOIUrl":"https://doi.org/10.1109/NSEMC.1989.37205","url":null,"abstract":"A description is given of a new release of Greenfield, a family of analog simulation software tools that simulate the behavior of multilayer printed-circuit boards (PCBs) under high-speed switching conditions. Per unit length inductance, capacitance and resistance matrices-for systems of coupled multiconductor microstrips and striplines-are produced by the two-dimensional Green's function boundary-element field solver Greenfield2d. Greenfield2d supports generation of different SPICE subcircuit models of coupled transmission lines. These models can be subsequently used in Phyllis or any tool which supports SPICE netlist syntax. Cross-sections of multiconductor structures including stripline, microstrip and no-ground connections are shown. The boundary-element procedure is used to generate circuit models for these electromagnetically coupled structures. Time-domain signals and cross-talk waveforms are shown in the time domain.<<ETX>>","PeriodicalId":408694,"journal":{"name":"National Symposium on Electromagnetic Compatibility","volume":"167 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121571593","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}
引用次数: 3
Detuning free-standing towers at MF frequencies 在中频频率下调谐独立塔
National Symposium on Electromagnetic Compatibility Pub Date : 1989-05-23 DOI: 10.1109/NSEMC.1989.37224
C. Trueman, T.M. Roobroeck, S. Kubina
{"title":"Detuning free-standing towers at MF frequencies","authors":"C. Trueman, T.M. Roobroeck, S. Kubina","doi":"10.1109/NSEMC.1989.37224","DOIUrl":"https://doi.org/10.1109/NSEMC.1989.37224","url":null,"abstract":"Many commercial AM broadcast antennas must maintain a directional pattern to avoid interference with other stations on the same frequency. Scattering of the station's signal can lead to field strengths in excess of those stipulated by the station's licence; free-standing towers scatter the signal effectively if the tower height is comparable to the quarter-wavelength. In the paper, means of suppressing the scattered field from a free-standing power line tower by installing a so-called detuning device on the tower are investigated. Several detuner designs are studied by measuring the base impedance of a scale model tower on a ground plane. The measured results were reproduced with a computer model of the tower and detuner. The computer model was then used to study scattering from the detuned tower to determine the degree of reduction in the scattered field and the bandwidth over which an adequate reduction is achieved. Some standard detuner designs and some novel designs are compared.<<ETX>>","PeriodicalId":408694,"journal":{"name":"National Symposium on Electromagnetic Compatibility","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127950006","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}
引用次数: 0
Modeling of electrostatic fields in solid propellants using finite element techniques 固体推进剂静电场的有限元模拟
National Symposium on Electromagnetic Compatibility Pub Date : 1989-05-23 DOI: 10.1109/NSEMC.1989.37164
V.R.D. SunderRaj, J. D. Curry, R. Larson
{"title":"Modeling of electrostatic fields in solid propellants using finite element techniques","authors":"V.R.D. SunderRaj, J. D. Curry, R. Larson","doi":"10.1109/NSEMC.1989.37164","DOIUrl":"https://doi.org/10.1109/NSEMC.1989.37164","url":null,"abstract":"Features of solid propellants that make them particularly susceptible to electrostatic discharges are described. Since the use of finite-element techniques has proven to be the most satisfactory approach to determining electrostatic fields inside complicated solid propellant geometries, the authors' emphasis is placed on ways to obtain accurate results, on the accuracy of the results using special test cases, and on the details of preprocessing and postprocessing the fields. Examples are given from hazards analyses performed on solid rocket motors. The transferability of the finite element modeling method to other electrostatic applications is briefly noted. The finite element technique has shown significant advantages in: solution accuracy; simplifying interaction during problem setup; ease of obtaining solution; display and interpretation of results; efficient use of computing time; and decreasing total solution time.<<ETX>>","PeriodicalId":408694,"journal":{"name":"National Symposium on Electromagnetic Compatibility","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133497683","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}
引用次数: 1
Computation of intermodulation and interference in telecommand due to the ranging signal of the ESA multi purpose tracking system: lack of degradation 欧空局多用途跟踪系统测距信号的互调和干扰计算:缺乏退化
National Symposium on Electromagnetic Compatibility Pub Date : 1989-05-23 DOI: 10.1109/NSEMC.1989.37225
R. De Gaudenzi, M. Nahvi
{"title":"Computation of intermodulation and interference in telecommand due to the ranging signal of the ESA multi purpose tracking system: lack of degradation","authors":"R. De Gaudenzi, M. Nahvi","doi":"10.1109/NSEMC.1989.37225","DOIUrl":"https://doi.org/10.1109/NSEMC.1989.37225","url":null,"abstract":"The performance of the European Space Agency (ESA) spacecraft telecommand subsystem due to simultaneous ranging is analyzed. The use of the ESA multipurpose tracking system, which represents an improved version of the deep space tracking system, is assumed. Numerical results show that the telecommand bit error rate degradation is negligible and that the frequency optimization proposed by T.M. Nguyen (IEEE 1987 National Symp. on Electromag. Compat., Conf. Record, p.308-17) is not applicable because of the wrong Fourier code expansion proposed. It is also shown that the interference level strongly depends on the relative phase between the telecommand subcarrier and the ranging tone, so that it cannot be neglected as assumed by Nguyen.<<ETX>>","PeriodicalId":408694,"journal":{"name":"National Symposium on Electromagnetic Compatibility","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130290913","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}
引用次数: 2
A new thrust in radar EMC design for the twenty first century 21世纪雷达电磁兼容设计的新推动力
National Symposium on Electromagnetic Compatibility Pub Date : 1989-05-23 DOI: 10.1109/NSEMC.1989.37187
R. Marcus
{"title":"A new thrust in radar EMC design for the twenty first century","authors":"R. Marcus","doi":"10.1109/NSEMC.1989.37187","DOIUrl":"https://doi.org/10.1109/NSEMC.1989.37187","url":null,"abstract":"A review is presented of the technical requirements of MIL-STD-469 (Radar Engineering Design Requirements-Electromagnetic Compatibility), and the Radar Spectrum Engineering Criteria (RSEC) of the National Telecommunications and Information Administration (NTIA) both of which are intended to restrict the radiated emissions spectra of defense radars to enhance electromagnetic compatibility, with other cosite communications electronics. Each of these standards contains technically contrasting procedures for determining maximum acceptable limits to radar emissions. In contrast with MIL-STD-469, the RSEC document to NTIA approaches the radar EMC (electromagnetic compatibility) problem from the perspective of relative limits on spectral emission bandwidth. A theoretical examination of compliance difficulties with MIL-STD-469 is presented and contrasted with the RSEC. The analysis uses the method of determining the bounds of the spectrum of a continuous-wave pulse formulated by S.J. Mason and H.J. Zimmermann (1960) together with a modification of this method by P.D. Newhouse (1982) for determining the bounds on the spectrum of an FM (chirp) pulse.<<ETX>>","PeriodicalId":408694,"journal":{"name":"National Symposium on Electromagnetic Compatibility","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132166178","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}
引用次数: 1
Shielding effectiveness measurements for an SHF/EHF field-to-wire coupling model 超高频场-线耦合模型的屏蔽效能测量
National Symposium on Electromagnetic Compatibility Pub Date : 1989-05-23 DOI: 10.1109/NSEMC.1989.37221
A. McMahon, J. Weber, A. Prothe, A. Pesta
{"title":"Shielding effectiveness measurements for an SHF/EHF field-to-wire coupling model","authors":"A. McMahon, J. Weber, A. Prothe, A. Pesta","doi":"10.1109/NSEMC.1989.37221","DOIUrl":"https://doi.org/10.1109/NSEMC.1989.37221","url":null,"abstract":"The Intrasystem Electromagnetic Compatibility Analysis Program (IEMCAP) is a widely used code for electromagnetic compatibility (EMC) modeling. IEMCAP includes a coupling model for an external field incident on a wire over a ground plane (field-to-wire model). To expand the capability of IEMCAP in the SHF/EHF region, the frequency range of the field-to-wire model was increased to 40 GHz. Since the field-to-wire model must account for shielded cables as well as bare wires, experiments were conducted in a mode-tuned reverberation chamber to measure the shielding effectiveness from 1 GHz to 40 GHz of various types of cables. A wide variety of experimental parameters were surveyed. These included cable type (coaxial cables, twisted pairs), shielding (single and double shields), cable length, termination impedance, and shield termination condition (circumferentially bonded shield, pigtail, ungrounded shield). The shielding measurements were made well outside the normal operating region of the cables under test.<<ETX>>","PeriodicalId":408694,"journal":{"name":"National Symposium on Electromagnetic Compatibility","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114273002","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}
引用次数: 5
The new SAE J1816 for measurements of narrowband electromagnetic emissions from land vehicles 新的SAE J1816用于测量陆地车辆的窄带电磁发射
National Symposium on Electromagnetic Compatibility Pub Date : 1989-05-23 DOI: 10.1109/NSEMC.1989.37193
E. Bronaugh
{"title":"The new SAE J1816 for measurements of narrowband electromagnetic emissions from land vehicles","authors":"E. Bronaugh","doi":"10.1109/NSEMC.1989.37193","DOIUrl":"https://doi.org/10.1109/NSEMC.1989.37193","url":null,"abstract":"The Society of Automotive Engineers (SAE) procedure J1816 'Performance Levels and Methods of Measurement of Electromagnetic Radiation from Vehicles and Devices, Narrowband, 10 kHz to 1000 MHz' is summarized in total and the essential parts of the measurement methods and limits are described specifically. Its contents are listed, and the reasoning behind the methods is explained. The performance levels (limits) of J1816 are compared to those of J551, ANSI C63.12, and the US Federal Communications Commission. Part 15J, Class B limits. Both near-field data reduction of magnetic-field strengths and the rejection of broadband noise while measuring the narrowband vehicular emissions are discussed.<<ETX>>","PeriodicalId":408694,"journal":{"name":"National Symposium on Electromagnetic Compatibility","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130598204","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}
引用次数: 1
Open area EM field measurements for radiation hazard purposes 用于辐射危害目的的开放区域电磁场测量
National Symposium on Electromagnetic Compatibility Pub Date : 1989-05-23 DOI: 10.1109/NSEMC.1989.37175
F. Bevacqua, E. Cipollone, A. Morviducci, L. Venditti
{"title":"Open area EM field measurements for radiation hazard purposes","authors":"F. Bevacqua, E. Cipollone, A. Morviducci, L. Venditti","doi":"10.1109/NSEMC.1989.37175","DOIUrl":"https://doi.org/10.1109/NSEMC.1989.37175","url":null,"abstract":"Data are presented from the measurement of electromagnetic (EM) radiation pollution for radiation hazard assessment. The measurement data are compared to international standards. regulations, and laws. Special attention was devoted to the measurement of the EM fields near hospitals. It is felt that the effect of field levels currently allowed for the Italian population could be, in some cases, very dangerous for pacemaker wearers and other using electrical/electronic medical devices.<<ETX>>","PeriodicalId":408694,"journal":{"name":"National Symposium on Electromagnetic Compatibility","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122989590","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}
引用次数: 0
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