1986 IEEE International Symposium on Electromagnetic Compatibility最新文献_第6页

A Lattice Approach to Complex Electromagnetic Environments 复杂电磁环境的晶格方法

1986 IEEE International Symposium on Electromagnetic Compatibility Pub Date : 1986-09-01 DOI: 10.1109/ISEMC.1986.7568263

J. Randa, M. Kanda

引用次数: 0

Progress Toward a World Standard for Control of Ignition Radiation 点火辐射控制国际标准的研究进展

1986 IEEE International Symposium on Electromagnetic Compatibility Pub Date : 1986-09-01 DOI: 10.1109/ISEMC.1986.7568222

F. Bauer

{"title":"Progress Toward a World Standard for Control of Ignition Radiation","authors":"F. Bauer","doi":"10.1109/ISEMC.1986.7568222","DOIUrl":"https://doi.org/10.1109/ISEMC.1986.7568222","url":null,"abstract":"C.I.S.P.R. (International Special Committee On Radio Interference) Subcommittee D (formerly named Working Group 4) has been engaged in the development of suppression techniques, measurements, and limits for impulsive ignition noise since 1960. Beginning with at least seven uncoordinated national specifications then, negotiation and coopera tion have today resulted in a Standard which has the potential of being adopted for use in every industrial country in the world. Uses of radio and TV have bloomed during devel opment of the C.I.S.P.R. Standard adding complexity to the task. Major developments are highlighted, together with a brief history of the Standard and an explanation offered how the work of the Subcommittee assists the flow of international trade. Introduction In the length of time required for you to take one breath, the engine in your car will probably fire 250 times — a perfect spark transmitter with the potential to interfere with communications unless sup pression is provided. Actually, radio interference is not a recent phenomenon; the first known case was re ported in 1902 when the noise of a two-cylinder auto motive engine was first detected [l].** But radio transmissions, whether of desired signal or of interference have no regard for inter national boundaries. Thus international control is vital and therein lies the central role of C.I.S.P.R. International standards (such as that designed to control ignition interference) affect international business relations, flow of trade, and profits. This is a welcome opportunity to review the special aspects and abilities of the world automotive industry from the special viewpoint of radio frequency interference.","PeriodicalId":244612,"journal":{"name":"1986 IEEE International Symposium on Electromagnetic Compatibility","volume":"55 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":"126889535","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

Measured Electrical Impedance of Two Generic Panel Joints 两个通用面板接头的测量电阻抗

1986 IEEE International Symposium on Electromagnetic Compatibility Pub Date : 1986-09-01 DOI: 10.1109/ISEMC.1986.7568231

L. Hoeft, J. Hofstra

引用次数: 5

Advanced Cable Shield Termination Process for Broad-Band EMI Suppression 宽带电磁干扰抑制的先进电缆屏蔽终端工艺

1986 IEEE International Symposium on Electromagnetic Compatibility Pub Date : 1986-09-01 DOI: 10.1109/ISEMC.1986.7568212

Jeffrey J. Hager, Michael Van Brunt

{"title":"Advanced Cable Shield Termination Process for Broad-Band EMI Suppression","authors":"Jeffrey J. Hager, Michael Van Brunt","doi":"10.1109/ISEMC.1986.7568212","DOIUrl":"https://doi.org/10.1109/ISEMC.1986.7568212","url":null,"abstract":"This paper deals with the design progression, qualifi cation, and application of an advanced cable-toconnector termination process for circular connectors. The design includes a method for terminating backshells, and cables constructed of individually shielded conductors with overall shields. This project was initiated because of recently defined operational requirements and the critical need to redesign shielded cable to connector terminations. The objective of this project was to design and develop a shielded cable-to-connector termination that would combine a high level of broad-band electro magnetic shielding, superior mechanical characteris tics, ease of assembly, and cost effectiveness. In pursuit of the stated objectives the design produced broad-band attenuation in excess of 120 dB in the frequency range of 100 KHz to 3 GHz, sloping to 90 dB at 10 GHz. The mechanical evaluation produced backshell bending moments and torque resistance in excess of 1000 inch pounds. Dynamic loading of 40 G random for eight hours in each axis produced no degradation to the electrical or mechanical character of the backshell to connector interface. The significance of this work lies in the fact that it is possible to terminate shielded cables to connectors and provide the same degree of broad-band attenuation to electro magnetic radiation supplied by the connectors themselves.","PeriodicalId":244612,"journal":{"name":"1986 IEEE International Symposium on Electromagnetic Compatibility","volume":"13 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":"130238332","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

Linking Training to On-The-Job Performance 将培训与在职表现联系起来

1986 IEEE International Symposium on Electromagnetic Compatibility Pub Date : 1986-09-01 DOI: 10.1109/ISEMC.1986.7568247

Gregory V. Gore

引用次数: 0

Generation of Electromagnetic Fields That Have a Variable Impedance for the Testing of a Magnetic Field Sensor 磁场传感器测试中可变阻抗电磁场的产生

1986 IEEE International Symposium on Electromagnetic Compatibility Pub Date : 1986-09-01 DOI: 10.1109/ISEMC.1986.7568249

M. Terrien

引用次数: 1

Experimental Study of Road Guided Waves in a Snowy Mountain 雪山道路导波的实验研究

1986 IEEE International Symposium on Electromagnetic Compatibility Pub Date : 1986-09-01 DOI: 10.1109/ISEMC.1986.7568218

Y. Yamaguchi, Yukio Ohtaki, Kazuhiro Watanabe, Yasuaki Kidou, T. Abe

引用次数: 1

The Effective Shielding Effectiveness of a Space Vehicle 空间飞行器的有效屏蔽效能

1986 IEEE International Symposium on Electromagnetic Compatibility Pub Date : 1986-09-01 DOI: 10.1109/ISEMC.1986.7568211

A. Rashid

{"title":"The Effective Shielding Effectiveness of a Space Vehicle","authors":"A. Rashid","doi":"10.1109/ISEMC.1986.7568211","DOIUrl":"https://doi.org/10.1109/ISEMC.1986.7568211","url":null,"abstract":"A mathematical formula has been developed to predict the shielding effectiveness, from inside to outside, of a space vehicle. Such a formula shows that the shielding effectiveness of such a space vehicle varies as the point of observation on the outside of the space vehicle is varied. A possible method of measuring the shielding effectiveness of a space vehicle is presented. The electromagnetic compatibility of equipments inside a space vehicle depends upon the shielding effectiveness of the space vehicle. Antennas mounted externally receives desired signals in the presence of interfering signals generated by equipments within the space vehicle. Such interfering signals penetrate the structure and are received by the external antennas. The amplitude of such interfering signals may be reduced by cable shielding, equipment case shielding and vehicle structural shielding. The shielding effectiveness of the structure, from inside to outside, depends upon the location of the source inside the space vehicle, the apertures and shims on the vehicle structure, and the method of cable penetrations through the vehicle structure. A typical example of a space vehicle is the GPS satellite. It consists of four antenna systems: i) an L-band antenna system consisting of a helex antenna array. (2) telemetry, tracking and command antenna system consisting of conical spirals. (3) an UHF dipole and (4) a W-Sensor antenna as shown in figure 1. A typical method of measuring the shielding effectiveness of a space vehicle is shown in figure 2. In this method, the space vehicle structure is rotated about its axis and the electric field intensity, at various points on the structure, may be measured with the source located inside the space vehicle. The location of the source inside the space vehicle needs to be varied to take into account the effect of source location on the shielding effectiveness of the ; ructure. The measured minimum shielding effectiveness of the structure at a given frequency should be accepted as the true shielding effectiveness of the structure. If such a true shielding effectiveness value is unacceptable, various techniques may be implemented on the structure to increase its shielding effectiveness. CH2294-7/86/000-0062 $01.00©1986 IEEE 62","PeriodicalId":244612,"journal":{"name":"1986 IEEE International Symposium on Electromagnetic Compatibility","volume":"118 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":"125040465","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

Correlation of MIL-STD-285 Measurements, Seam Transfer Impedance and EMP Shielding Effectiveness MIL-STD-285测量值、接缝传输阻抗和EMP屏蔽效能的相关性

1986 IEEE International Symposium on Electromagnetic Compatibility Pub Date : 1986-09-01 DOI: 10.1109/ISEMC.1986.7568280

J. R. Elliott, T. Rudolph, S. Parker, R. Perala, P. McKenna

{"title":"Correlation of MIL-STD-285 Measurements, Seam Transfer Impedance and EMP Shielding Effectiveness","authors":"J. R. Elliott, T. Rudolph, S. Parker, R. Perala, P. McKenna","doi":"10.1109/ISEMC.1986.7568280","DOIUrl":"https://doi.org/10.1109/ISEMC.1986.7568280","url":null,"abstract":"A model for the penetration of shielded enclosures by electromagnetic fields is developed. The dominant sources are seams, each of which is characterized by its own transfer impedance. This parameter is used to relate shielding effectiveness determined by RFCW MIL-STD-285 measurements to the EMP case. The results of measurements and computer simulations for both RFCW and EMP demonstrate the efficacy of the technique. INTRODUCTION The problem of determining an enclosure's hardness to EMP is of both general and continuing interest. EMP simulators such as the AESOP at the Woodbridge Research Facility at Harry Diamond Laboratories in Virginia, are useful for testing sample shelters and understanding their response characteristics to high intensity EMP fields. This approach is clearly impractical for determining the shielding effectiveness (SE) of each shelter used in a given application. Furthermore, there is the task of verifying that the hardness of units in the field does not deteriorate to unacceptable levels over extended periods of time. The size, cost and location limitations of true EMP simulators make them ill-suited for ongoing evaluation of large numbers of dispersed shelters. MIL-STD-285 [1] testing is an alternative approach to measuring the shielding effectiveness of shelters for certain types of incident EM fields. The equipment used in this set of procedures is relatively inexpensive and portable. Additionally, there is a large body of experience and expertise accumulated in MIL-STD-285 testing that makes it available on a widespread and easily accessible basis. The problem, of course, is that the test fields are not identical. The EMP fields generally arrive as short duration plane waves illuminating the entire shelter and surroundings. Figure 1 illustrates a typical case of EMP incident on a shelter. MIL-STD-285 tests employ more localized CW fields whose wave impedances are determined by the specified antennas and separation. Figure 2 illustrates a typical MIL-STD-285 test setup. The challenge, then, is to understand the nature of electromagnetic penetration into an enclosure for both types of fields [2] and to establish a mapping from MIL-STD285 SE results to EMP SE values. This paper will attempt to establish the MIL-STD-285 to EMP connection by building a single parameter model of field penetration valid in both cases. A numerical * Work performed under subcontract for SOL Telecommunications Services, Inc. HDL Prime Contract No. DAAK21-85-C-0061 C H2294-7/86/000-0423 $ 0 1 .0 0 © 1 9 8 6 IEEE r-i 1","PeriodicalId":244612,"journal":{"name":"1986 IEEE International Symposium on Electromagnetic Compatibility","volume":"10 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":"130249507","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

Response of Coaxial Cable Over a Finite Ground Plane to an External Electromagnetic Field 有限地平面上同轴电缆对外部电磁场的响应

1986 IEEE International Symposium on Electromagnetic Compatibility Pub Date : 1986-09-01 DOI: 10.1109/ISEMC.1986.7568242

Jian-hua Guo, R. M. Showers

{"title":"Response of Coaxial Cable Over a Finite Ground Plane to an External Electromagnetic Field","authors":"Jian-hua Guo, R. M. Showers","doi":"10.1109/ISEMC.1986.7568242","DOIUrl":"https://doi.org/10.1109/ISEMC.1986.7568242","url":null,"abstract":"The resonance p ro p e r t ie s o f a coaxial cable over a r e s t r i c t e d ground “plane\" s t r u c tu re to an ex t e r n a l ly impressed f i e l d are d iscussed. Experimental data have been obtained as the s iz e o f the ground s t r u c tu re was var ied . The advantages o f m ult ipo in t grounding are ind ica ted in a q u a n t i t a t iv e manner. 1. In troduction Modern communication and data processing systems f requen t ly use coaxial cables fo r s ignal transm ission . These cables inhe ren t ly provide a s i g n i f i c a n t degree o f p ro tec t ion a g a in s t unwanted e x te rn a l ly impressed e lectromagnetic f i e l d s . With s in g le braided ca b le s , however, occasions arisewhere the p ro tec t ion i s inadequate. In such cases the condition of “grounding\" o f such cables may s i g n i f i c a n t ly a f f e c t the sh ie ld ing e f fec t iv e n ess o f the cab le . This paper i s concerned with the e f f e c t s o f such grounding techniques. O rd in a r i ly , th e o re t ic a l considera t ions o f th i s problem are based on the assumed presence of an in f i n i t e p e r f e c t ly conducting ground plane. With such a s t r u c tu re i t i s common to apply image theory as long as the cable i s not too f a r from the ground plane in terms o f the cable leng th . According to image theory , the s ing le -w ire transmission l in e over the i n f i n i t e p e r fe c t ly conducting ground can be t r e a te d as a twowire transm ission l i n e without ground as shown in Fig. 1 [ l ] . Direct field comparable with t h a t o f the cable i t s e l f . In t h i s s tudy , an at tempt i s made to determine the r e l a t i o n between the s iz e o f the \"ground\" con ductor and the in te r fe re n c e produced by an external e lectromagnetic f i e l d by p rac t ic a l measurement. In the measurements the leng th and he igh t o f the coaxial cable and ground conductor were kept co n s tan t while varying the width o f the ground conductor only. For the purpose o f t h i s s tudy , the sh ie ld ing e f fec t iv e n ess to ex ternal e lectromagnetic f i e l d s i s defined by the r a t i o V^/E, where Vt, i s the voltage across the i n t e r i o r load impedance and E i s the e l e c t r i c f i e l d s treng th o f the ex ternal e l e c t r o magnetic f i e l d inducing V^. A 4-meter length o f RG-58C/U coaxial cable was used in the experimental se tup. The magnitude o f the surface t r a n s f e r impedance Zt was obtained from experimental data [2 ] as given below: Zt = 0.0286 f 0 -462 0 .5 < f < 10 .0.0074 f 1 ' 05 10 < f < 50 ( 1) where f is the frequency in MHz. 2. Experimental Arrangement The experimental arrangement i s shown in Fig. 2. The 4 meter length o f cable i s located a t a","PeriodicalId":244612,"journal":{"name":"1986 IEEE International Symposium on Electromagnetic Compatibility","volume":"50 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":"130562871","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