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1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)

2-6 Aug. 1999

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  • 1999 IEEE International Symposium on Electromagnetic Compatibility [front matter]

    Publication Year: 1999, Page(s):i - xv
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  • Author index

    Publication Year: 1999, Page(s):1040 - 1044
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    Freely Available from IEEE
  • Title index

    Publication Year: 1999, Page(s):1045 - 1050
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  • Interaction between lightning channel and CTS

    Publication Year: 1999, Page(s):643 - 647 vol.2
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    Ion current starts to flow into surrounding air from all objects on the ground when the electric field produced by the charges in thunderstorm clouds and in a stepped leader will reach some critical value, Eon. Calculations of the total electric field of the lightning channel at the points close to the ground do not usually take into consideration the component originated by the space c... View full abstract»

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  • The design of a lightning attachment simulator

    Publication Year: 1999, Page(s):640 - 642 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (268 KB)

    When lightning strikes an airplane, it generally attaches to a leading edge such as the nose, wing tips, forward part of a vertical tail, or some other leading edge protrusion and leaves via a sharp trailing edge such as the rear wing tip or tail. In order to clearly visualize this phenomena, a lightning attachment simulator was designed and constructed by students at North Dakota State University... View full abstract»

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  • Lightning radiated electric fields and their contribution to induced voltages

    Publication Year: 1999, Page(s):635 - 639 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    During the return stroke, the radiated electric field from a lightning channel contains vertical and horizontal components of the electric fields, which are both responsible for producing transients in power lines, telecommunication lines, and electronic circuitry of communication and control systems. This paper analyses the characteristics of the vertical and horizontal components of the electric... View full abstract»

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  • Cloud influence in evaluating the electric field of a lightning return stroke

    Publication Year: 1999, Page(s):629 - 634 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    A theoretical model to evaluate the electric field of a lightning return-stroke by taking into account the presence of the cloud, is illustrated. The cloud-lightning channel system is modelled by employing a perfectly conducting sphere placed above a thin-wire vertical antenna excited by a lightning current at the ground level. The current distribution in the channel is derived by a transmission l... View full abstract»

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  • Effect of lead length on the response of ESD protection devices

    Publication Year: 1999, Page(s):998 - 1003 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (532 KB)

    One method of protecting electronic components from the effects of ESD is to shunt the ESD current to ground. The response of the protection devices can be affected, however, by parasitic components in the component structure, as well as board parasitics such as the inductance of the traces and connectors to which the protective device is connected to. The effect of component lead length is invest... View full abstract»

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  • P×M antennas for immunity testing and other field generation applications

    Publication Year: 1999, Page(s):624 - 628 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    Field strength and frequency range requirements for contemporary immunity testing standards combined with amplifier limitations impose severe difficulties for compact antenna designs. Current approaches generally involve broadband dipole antennas sometimes combined with log-periodic dipole arrays. Certain combinations of electric and magnetic dipole radiators known as P×M antennas offer defi... View full abstract»

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  • A new common-mode voltage probe for predicting EMI from unshielded differential-pair cables

    Publication Year: 1999, Page(s):873 - 878 vol.2
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    A common-mode (CM) voltage probe for prediction of the EMI levels from unshielded differential twisted-pair cables is described. CM currents on I/O cables are primary sources of EMI in many electronic devices. Measuring the CM voltage at the I/O connectors can be an alternative to measuring CM currents. CM voltages at the RJ-45 ports were measured and correlated to the 10m E-field levels of 8 DUTs... View full abstract»

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  • Laboratory simulation of dry band arcing on all-dielectric self-supporting fiber optic cable near high voltage power lines

    Publication Year: 1999, Page(s):993 - 997 vol.2
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    Electric utilities have experienced failure of all-dielectric self-supporting optical fiber cable in the high electric field environment of power transmission lines. Corona and/or arcing can degrade the cable jacket and cause it to fail. The paper describes a laboratory experiment to property simulate the arcing phenomenon so that it can be better understood View full abstract»

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  • Analysis of log periodic dipole array antennas for site validation and radiated emissions testing

    Publication Year: 1999, Page(s):618 - 623 vol.2
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (548 KB)

    Log periodic dipole array (LPDA) antennas are one of the most widely used antenna types for normalized site attenuation (NSA) and radiated emission (RE) testing. A thorough understanding of the possible error sources associated with the calibration and application of LPDAs for EMC tests over a ground plane is essential for evaluating and minimizing measurement uncertainties. Systematic errors are ... View full abstract»

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  • Measurement of the antenna factor of diverse antennas using a modified standard site method

    Publication Year: 1999, Page(s):595 - 600 vol.2
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (468 KB)

    The standard site method given in ANSI C63.5-1988 is a convenient, widely used technique for determining the antenna factors of EMC testing antennas using open area test sites. The technique works well for dipoles and dipole-like antennas including broadband biconical antennas. However, for some types of antennas including some log-periodic dipole arrays as well as some new types of compact, broad... View full abstract»

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  • An EMC design approach for integrating COTS equipment into an existing military aircraft

    Publication Year: 1999, Page(s):986 - 991 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    Using commercial off the shelf (COTS) computing equipment in military aircraft applications may cause harmful electromagnetic interference (EMI) to other on-board systems, including communication and navigation equipment. An electromagnetic compatibility (EMC) design approach to successfully integrate COTS equipment into an existing military aircraft is described. The following system design and d... View full abstract»

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  • On the benefits of using IEEE Std 299-1997 for shielding effectiveness testing

    Publication Year: 1999, Page(s):1016 - 1021 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    MIL-STD-285 and the origination of IEEE Std 299 go back several decades. More recent versions of Std 299 maintained technically sound test methods, but required that all frequency ranges be applied when testing enclosures. Some frequency ranges were not available for testing at all. This paper summarizes the benefits to shield owners and users that are incorporated in the current revision of Std 2... View full abstract»

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  • Radiation pattern of a PCB based probe intended for near field measurements

    Publication Year: 1999, Page(s):879 - 881 vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    In some situations, the OATS (open air test site) far field condition cannot be satisfied, and near field measurements must be performed. The EMI environment inside a car is one of these situations, where only near field probes can be used for measurement. We developed a near field probe that can measure the electric and magnetic fields simultaneously. The probe was built on a PCB (printed circuit... View full abstract»

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  • Noise control in modern position sensor design for avionics

    Publication Year: 1999, Page(s):751 - 755 vol.2
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    The effects of noise generated by digital electronics on avionics hardware has raised concerns over the last several years. Particularly vulnerable to this noise are the many analog sensors used throughout an aircraft for monitoring a significant number of commands and their responses. A description is formulated of the widely used positioning sensor in aircraft known as the linear variable differ... View full abstract»

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  • A practical comparison of cabling effects on radiated emissions

    Publication Year: 1999, Page(s):734 - 738 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1056 KB)

    External cables are one of the major sources of radiated emissions. Theoretical and practical effects of cable shielding, and the use of ferrites have been analyzed in previous studies under test conditions such as noise source, cable, termination setup's etc. We have looked at cabling effects from a practical point of view. We measured radiated emissions of a typical IT device with Ethernet and R... View full abstract»

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  • Automatic radio frequency monitoring measurements

    Publication Year: 1999, Page(s):716 - 721 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1480 KB)

    Agencies responsible for monitoring spectrum-emitting systems desire accuracy and efficiency in their measurement techniques. This paper describes six automated measurements that were designed and developed to monitor the radars, navigational aids, HF communications systems, and commercial broadcast systems for the Federal Aviation Administration (FAA) View full abstract»

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  • Analysis of shielding enclosures using the multilevel plane wave time domain algorithm

    Publication Year: 1999, Page(s):690 - 693 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    While both integral and differential equation based time domain solvers have been known to the CEM community for many years, the latter are usually chosen for analyzing EMI/EMC problems. This is due to the fact that classical time domain integral equation solvers, such as the marching-on-in-time (MOT) method, suffer from a high computational complexity. Indeed, the memory requirements and the comp... View full abstract»

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  • Impact on radiated emissions of printed circuit board stitching

    Publication Year: 1999, Page(s):793 - 796 vol.2
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    The use of closely-spaced vias, or “stitching”, is used to reduce radiated emissions from the edge of a printed circuit board (PCB). However, this stitching, by confining the electromagnetic noise to the PCB internals instead of allowing it to radiate, causes undesirable effects by coupling to internal traces and vias. Internal traces connected to outside traces and components provide ... View full abstract»

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  • High quality shielding with predictable and verifiable effectiveness

    Publication Year: 1999, Page(s):565 - 570 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    Shielding is an important technique often needed to control EMI. The shielding effectiveness is poorly defined, however, in EMC literature. Measurement procedures, such as MIL-STD-285, are useless and also conceptually false. The theories about the absorption of electromagnetic waves inside of a conducting medium and their reflection from the boundary surface are scientifically correct. They predi... View full abstract»

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  • Measuring EMC emissions in the real world

    Publication Year: 1999, Page(s):613 - 617 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    Standard techniques for the measurement of emissions for most products require the use of an OATS (open area test site). In reality, very few organisations (excluding the Test Laboratories) have access to such facilities. However, an increasing number of organisations, particularly in Europe and increasingly in the US, are intent on conducting their own emissions checks, either for self certificat... View full abstract»

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  • Suppression of radiated emission from an 8-bit micro-controller using gate-oxide filtering capacitors

    Publication Year: 1999, Page(s):811 - 815 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    The voltage fluctuations of the power/ground lines on ICs, packages, and modules have become the major source of the radiated emission. Combined suppression techniques including shielding, cabling and filtering at the package level and the module level are not enough for the complete suppression of radiated emission. Moreover, the power/ground line fluctuations and the resulted radiated emissions ... View full abstract»

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  • The multilevel fast multipole algorithm for electromagnetic compatibility analysis

    Publication Year: 1999, Page(s):844 - 847 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (316 KB)

    This paper studies the application of the multilevel fast multipole algorithm (MLFMA) to the analysis of electromagnetic compatibility (EMC) problems. For structures composed of complex surfaces, wires, and interconnections of the latter, the MLFMA achieves the same accuracy as the classical method of moments, but requires far less simulation time and memory resources. In this paper, the MLFMA is ... View full abstract»

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