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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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  • Title index

    Publication Year: 1999, Page(s):1045 - 1050
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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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  • 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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  • Human exposure to cellular base station antennas

    Publication Year: 1999, Page(s):924 - 927 vol.2
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    The human exposure to RF power radiated by cellular base station antennas can be assessed by means of the incident power density averaged over the body. The convenience of adopting this quantity lies in its well-behaved decay away from the antenna. As a consequence, the average power density decay can be predicted using simple formulas, which remain valid even in the near-field of the antenna, whe... 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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  • EMI associated with inter-board connection for module-on-backplane and stacked-card configurations

    Publication Year: 1999, Page(s):797 - 802 vol.2
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    EMI associated with inter-board connection was studied through common-mode current measurements and FDTD modeling for stacked-card and module-on-backplane configurations. Three types of connections were investigated experimentally including an open pin field connection, an “ideal” semi-rigid coaxial cable connection, and a production connector. Both microstrip and stripline signal rout... View full abstract»

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  • Simulation of heating transfer in living biomass under microwave hyperthermia

    Publication Year: 1999, Page(s):919 - 923 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (244 KB)

    It is essential for developers and users of hyperthermia systems to predict, measure and interpret correctly the biomass thermal and vascular response to heating. Modeling of heat transfer in living biomass is a means towards this goal. In this work, the physical significance of the bioheat transfer equation is explained. The steady-state solution of the one-dimensional bioheat transfer equation i... 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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  • Rapid FDTD analysis of shielding enclosures

    Publication Year: 1999, Page(s):827 - 831 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    A numerical methodology is presented for fast broadband analysis of shielding enclosures. The methodology combines the standard finite-difference time-domain (FDTD) method with a non-symmetric Lanczos eigenvalue algorithm to generate directly a Pade approximation of the electromagnetic response of the structure over the frequency range of interest. The numerical implementation is such that each it... 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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  • The low voltage directive-overcoming our local “design culture” and getting it right

    Publication Year: 1999, Page(s):914 - 918 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    This paper proposes that many product safety non-compliances are consistently reproduced because designers are influenced by a set of local beliefs and assumptions that, unfortunately, vary from region to region. In this way, by understanding “why” these problems occur we will be better placed to correct the offending `design cultures' within our companies, eliminate the problem and sa... View full abstract»

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  • A novel Poynting vector analyzer

    Publication Year: 1999, Page(s):608 - 612 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    A new frequency selective field strength sensor (150 kHz-1 GHz) is described with high dynamic range, measuring all Poynting vector quantities (E, H, phase). Our chosen principle includes a synthesizer and a triple superhet conversion down to 0-150 Hz. The instrument uses transmission line sensor heads and special baluns with superb common mode rejection. Sensitivity data is shown, demonstrating t... View full abstract»

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  • Effects of ferrite sheet attachment to portable telephone in reducing electromagnetic absorption in human head

    Publication Year: 1999, Page(s):822 - 825 vol.2
    Cited by:  Papers (12)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    In order to reduce the spatial peak specific absorption rate (SAR) in a human head due to a portable telephone, we have proposed attaching a ferrite sheet to the portable telephone. In this paper, the mechanism of SAR reduction is reviewed and then the effects of the attachment location and size, and the material properties of ferrite sheet on the SAR reduction are investigated by using the finite... View full abstract»

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  • A comparison of radiated emissions testing to European Directive 95/54/EC using an open field test site and a semi-anechoic chamber

    Publication Year: 1999, Page(s):786 - 791 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    Most automotive component level testing, and in particular European Directive 95/54 requires that under some (in practice most) conditions radiated emissions measurements from electrical/electronic sub-assemblies (ESAs) are made with the ESA under test mounted on an elevated ground plane 1 m high on a wooden table. It is shown that how this ground plane is connected to the test sites ground is ver... View full abstract»

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  • New advanced methodology for near field measurements for SAR and antenna development

    Publication Year: 1999, Page(s):909 - 913 vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    The issue of RF safety has recently come to the forefront of both public and regulatory attention. In 1996, the US FCC released its Report and Order 96-326, which specified the acceptable limits for wireless devices and systems, and tightened the requirements for certification and licensing purposes. In 1998, the Industry Canada department responsible for radio licencing initiated development of c... View full abstract»

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  • A simplified algorithm for the selection of materials used to construct OATS

    Publication Year: 1999, Page(s):605 - 607 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    One of the most critical decisions to be made in the construction of open area test sites (OATS) is the selection of materials to be used for weather protection, that is, the selection of materials to be used in the construction of the ceiling and walls. For common construction materials, it is the dielectric constant and the thickness which most affects the tendency of walls and ceilings to refle... View full abstract»

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  • Suppressed carrier digital clocks

    Publication Year: 1999, Page(s):816 - 821 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    Spread spectrum digital clocks have been used for decades to decrease radio interference. There are various techniques, such as random frequency dither or frequency modulation (FM). The mechanism is effective because the noise power is spread across a wide portion of the frequency spectrum, reducing the noise power available to disturb a narrow bandwidth receptor. A method is presented for creatin... View full abstract»

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  • Coupling of PEEC models with transmission line models for simulation of wiring structures

    Publication Year: 1999, Page(s):848 - 853 vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    In order to reduce the cost for the creation and simulation of partial element equivalent circuit (PEEC) models it is beneficial to describe sections, that fulfil the requirements for the transmission line equations (2D models) with transmission line (TL) models and couple them to the pure 3D PEEC models for the other parts. In this paper the coupling of PEEC models to the homogeneous TL model is ... View full abstract»

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  • Radio frequency susceptibility testing for RTCA/DO-160D, after Change Notice One

    Publication Year: 1999, Page(s):952 - 957 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (492 KB)

    RTCA/DO-160D, Environmental Conditions and Test Procedures for Airborne Equipment, defines a series of minimum standard environmental test conditions (categories) and applicable test procedures for airborne equipment. The purpose of these tests is to provide a laboratory means of determining the performance characteristics of airborne equipment in environmental conditions representative of those w... 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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  • The effect of cable geometry on the reproducibility of EMC measurements

    Publication Year: 1999, Page(s):780 - 785 vol.2
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    With respect to the reproducibility of EMC measurements and measurement uncertainty, an analysis of the deviation of cable transfer characteristics has been carried out. This paper shows some examples of the deviations by varying the length, height and manner of meandering of mains cables, which is far beyond the tolerance of 3.5 dB given for the measurement uncertainty limit for conducted emissio... View full abstract»

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  • Magnetostatic cleanliness of the radioisotope thermoelectric generators (RTGs) of Cassini

    Publication Year: 1999, Page(s):899 - 904 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    The Cassini spacecraft, launched in October 1997 to reach Saturn in 2004, carries two magnetometer experiments on a 10-meter boom, one at the mid-section of the boom and the other at the end of the boom. In order to gather valid scientific magnetic field data and avoid electromagnetic interference, the spacecraft had to comply with stringent magnetostatic cleanliness requirements. Amidst the stron... View full abstract»

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