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Seventh International Conference on Electromagnetic Compatibility, 1990

28-31 Aug 1990

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Displaying Results 1 - 25 of 55
  • Instrumentation configurations for the performance of EMP test procedures

    Publication Year: 1990, Page(s):301 - 307
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (536 KB)

    The authors briefly review the details associated with EMP hardness test procedures in MIL-STD-188-125 (draft) and MIL-STD-461C/462. These tests are important to nuclear weapon effects engineers because they simulate the stress of an electromagnetic pulse which a military electronics system will experience. Included are details of the equipment configurations for the tests, a discussion of the are... View full abstract»

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  • EMP and transient suppressed mains filters

    Publication Year: 1990, Page(s):318 - 323
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (192 KB)

    EMP protected mains filters currently being produced as standard products, provide various degrees of protection. Unfortunately, the precise degree of protection afforded is rarely defined clearly, and for a given filter range by a specific manufacturer, it can generally be deduced by the cost of the complete product. It is quite likely therefore, that when a particular range of EMP protected filt... View full abstract»

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  • EMP ship trial, planning, execution and result

    Publication Year: 1990, Page(s):308 - 317
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (368 KB)

    Electronic equipment fitted in naval vessels is extremely vulnerable to the effects of an electromagnetic pulse (EMP). The authors discuss briefly the theory of the generation of EMP, ship platform hardening techniques, conducting a ship EMP audit prior to an EMP trial, conducting an EMP ship trial, results obtained and concluding with the making of recommendations on how improvements can be made ... View full abstract»

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  • EMC implications of using unshielded twisted pair data busses in the aircraft environment

    Publication Year: 1990, Page(s):184 - 193
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (460 KB)

    Practical measurement data has been taken from the EMC tests carried out by BAe on a representative ARINC 629 Data Bus system using prototype hardware. The logical approach is given. The purpose of the tests was to establish the emission and susceptibility characteristics of the bus and its prototype interface hardware, and to compare these measured characteristics with the EMC specifications appl... View full abstract»

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  • Earth heterogeneity effects on the buried cable vulnerability to lightning

    Publication Year: 1990, Page(s):294 - 300
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (332 KB)

    The authors analyze the effect of the earth heterogeneity on the surges induced within buried cables by a nearby lightning discharge. A general formulation for the lightning induced electromagnetic fields in a multilayer Earth is developed in frequency domain by using a monopole technique. This technique is performed by the use of the so called modified transmission line model. Furthermore some nu... View full abstract»

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  • Simulation for electrostatic discharges

    Publication Year: 1990, Page(s):177 - 183
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (324 KB)

    The prime cause of breakdowns in electronic equipment today is still the effect of electrostatic discharges (ESD). The precise and reproducible simulation of such discharges using standardised and internationally recognised procedures is an indispensable tool for improving the quality of an electronic product by identifying potential weak spots during its development, production and/or installatio... View full abstract»

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  • Effective lightning protection

    Publication Year: 1990, Page(s):287 - 293
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (272 KB)

    The author presents the lightning protection problems both in general terms and as a technical evaluation. He shows the importance of both the requirements of the protection units and their placing in a typical installation. A thorough understanding of lightning protection requirements is developed, removing the misconceptions that currently exist within the electrical industry regarding protectio... View full abstract»

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  • Convenient current-injection immunity testing

    Publication Year: 1990, Page(s):173 - 176
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (192 KB)

    Describes a hand-held clamp-on current-injection tester intended for informal use. To minimise test time and to maximise the chances of finding susceptibility modes a wide range of frequencies and modulations is generated simultaneously. To ensure reproduceability current feedback from an independent transducer is provided View full abstract»

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  • Optimization of topside electromagnetic environment [ships]

    Publication Year: 1990, Page(s):281 - 286
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (424 KB)

    The ship's topside electromagnetic environment is becoming more complex. The number of antennas has been increasing, radiation characteristics are becoming more varied, and there are more modes of operation and a larger library of radiating parameters. For the improvement of EMC characteristics on ships it is necessary to optimize the topside and the arrangement of antennas. The approach to optimi... View full abstract»

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  • Prediction of PCB radiation in the presence of scattering bodies

    Publication Year: 1990, Page(s):137 - 139
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (176 KB)

    Radiation from printed circuit boards (PCBs) is strongly influenced by the presence of other bodies. The aim of this work is to predict such interactions in a realistic environment, such as a piece of computing equipment, and provide a useful software tool for EMC design View full abstract»

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  • Helmholtz coils for EMI immunity testing: stretching the uniform field area

    Publication Year: 1990, Page(s):169 - 172
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (224 KB)

    Helmholtz coils are used to establish known, uniform magnetic fields for calibrating magnetic field sensors, for EMI immunity testing, for magnetic bioeffects research, etc. But in the past, it has been assumed that only very small devices could be tested. The paper provides information leading to an understanding of the size of the uniform field region and how to trade off field uniformity for in... View full abstract»

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  • Development of the US Navy's PC-based Frequency Assignment Computer Terminal System

    Publication Year: 1990, Page(s):276 - 280
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (304 KB)

    In the past the US Navy's frequency records were kept either on microfiche or printed out on paper, and modifications and new assignments were penciled in on three-by five cards. This method of managing the spectrum became conspicuously archaic with the advent of computers that could perform EMC calculations and multiple frequency record transactions. To remedy this problem the US Navy, through th... View full abstract»

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  • Distortion analysis of ultrafast pulses in interconnections on integrated circuits

    Publication Year: 1990, Page(s):73 - 78
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (296 KB)

    Transmission line theory is used to develop a model appropriate for interconnects in VLSI. Since ultimate device switching speeds can be no shorter than a few picoseconds, pulse lengths of 5 ps and 50 ps are studied. The case where both ground and signal lines are in the same metallisation layer of the process is studied and geometries appropriate for existing technologies are considered. A compar... View full abstract»

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  • Technical rationale behind the proposed ANSI electrostatic discharge standard

    Publication Year: 1990, Page(s):10 - 15
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (384 KB)

    The American National Standards Institute (ANSI) is creating an ESD standard which provides guidance on electrostatic discharge testing procedures for electronic equipment using air discharge and contact discharge methodologies. The ANSI document contains material that has been ignored by other ESD standards and the authors who are ANSI committee members describe the issues which they feel should ... View full abstract»

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  • Simulation of transmission line discontinuities for transient analysis in high speed systems

    Publication Year: 1990, Page(s):132 - 136
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (316 KB)

    The authors present methods to simulate transmission line discontinuities in the time-domain. The simulation procedures are distinguished by methods that describe discontinuities. To describe the behaviour of discontinuities, a quasi-static approach by lumped elements is used as well as a description by scattering parameters. The latter represents the general approach for the computation of discon... View full abstract»

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  • Aspects of the bulk current immunity test

    Publication Year: 1990, Page(s):162 - 168
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (420 KB)

    Susceptibility measurements pose extreme problems when the vehicle of interest is physically large as the case of aircraft. It is usually impractical to subject the equipment under test (EUT) to very high level electromagnetic fields in the open, in its operational mode. It is generally equally impractical to find a suitable enclosure within which well-conditioned high-level fields can be generate... View full abstract»

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  • Development of a system level bench test for the automotive industry

    Publication Year: 1990, Page(s):270 - 275
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (312 KB)

    The author describes the experimental work carried out during the early stages of a project aimed at producing a system level bench test for automotive manufacturers and their suppliers. Susceptibility data on two vehicle systems obtained from bulk current injection tests is combined with transfer functions from open field trials and compared with results from radiated susceptibility chamber tests... View full abstract»

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  • Remarks to the solution of EMC-problems on printed-circuit-boards

    Publication Year: 1990, Page(s):68 - 72
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (288 KB)

    The author gives a survey of the PCB design process under EMC constraints. For a better understanding of the PCB design process with respect to EMC problems the standard design process is discussed first. Based on this discussion an alternate design process including EMC problems is defined. For this approach the PCB design problems are classified first. After this discussion the present state of ... View full abstract»

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  • The implementation of the EMC Directive

    Publication Year: 1990, Page(s):7 - 9
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (196 KB)

    The author sets the EMC Directive in its context in the new approach, describes the main features of the Directive and outlines some of the issues arising from its implementation in the UK View full abstract»

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  • The vehicle body as an electromagnetic shield-numerical simulation for emission and susceptibility studies

    Publication Year: 1990, Page(s):125 - 131
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (428 KB)

    In understanding EMC in vehicles it is necessary to review briefly the external and internal environment. The external environment is either a test environment or an environment typical of road conditions. Examples of the former are EMC compliance tests in screened or anechoic rooms. The internal environment of the car can be described as a leaky metal cavity loaded with a variety of materials, e.... View full abstract»

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  • A high field strength low-cost component susceptibility test facility

    Publication Year: 1990, Page(s):227 - 231
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (192 KB)

    One method of determining the immunity to electromagnetic radiation of an electronic system is to subject it to a transverse electromagnetic (TEM) wave which is propagated between two parallel conductive plates. Techniques are described here which have been used to increase the maximum attainable field strength within such a parallel plateline, while using the same amplifier output power, and to r... View full abstract»

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  • Analysis of an asymmetric TEM-cell for immunity testing

    Publication Year: 1990, Page(s):157 - 161
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (252 KB)

    An asymmetric TEM-cell is analyzed in terms of field uniformity, bandwidth and characteristic impedance. Measured values are compared with calculated values. If optimally designed, an asymmetric TEM-cell is an attractive alternative to a symmetric TEM-cell View full abstract»

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  • Semi-anechoic chamber site attenuation calculations [EM waves]

    Publication Year: 1990, Page(s):109 - 113
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (220 KB)

    The reflectivity of an absorber-covered surface depends on the angle of incidence and the polarization as well as the frequency of the incident electromagnetic wave. The problem of calculating all of the angles involved in multiple reflection paths can be simplified by using the method of images. The author shows how the angles can be computed in a straightforward fashion using images. In addition... View full abstract»

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  • Evaluation of a missile body EMI gasket

    Publication Year: 1990, Page(s):264 - 269
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (344 KB)

    A small missile body is being constructed from a series of interlocking sections made from aluminium alloys. Between each section an EMI gasket is fitted to ensure continuity of screening for the whole missile. The author describes how the electrical performance of this gasket has been determined both before and after exposure to a severe corrosive environment. A test method based on a measurement... View full abstract»

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  • A new test-cell for the characterisation of shielding materials in the far field

    Publication Year: 1990, Page(s):62 - 67
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (216 KB)

    A TEM-cell with rectangular cross-section and used in the transmission-mode is described, with its basic characteristics. The points discussed include: advantages of this cell, compared with existing test methods for shielding materials; use of the test-cell for different materials (metals, coated textiles, coated plastics, conductive (filled) plastics) and the correlation with other techniques; u... View full abstract»

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