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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  • 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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  • 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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  • 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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  • Creating a measurement scheduler for automated operation of the radio spectrum measurement system

    Publication Year: 1999, Page(s):722 - 727 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1232 KB)

    Limited time, funding, and personnel resources require that spectrum surveys be performed with maximum efficiency. This paper describes an approach taken to achieve this high efficiency: the automation of time intensive measurements that are performed on a regular basis. Organizations that are responsible for spectrum management periodically require spectrum surveys to identify spectrum usage and ... 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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  • Automatic radio frequency monitoring measurements

    Publication Year: 1999, Page(s):716 - 721 vol.2
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    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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  • Common-mode emissions from printed circuit boards simplified models, analysis and experiments

    Publication Year: 1999, Page(s):806 - 810 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    A relatively simple and accurate model of a printed-circuit-board (PCB) circuit producing common-mode (CM) radiated emission from an attached cable is presented. The analytical predictions are confirmed by current, voltage, and radiated-field measurements. Simplified analytical expressions useful for interpretation, prediction, design and corrective measures are given. The results compare favorabl... View full abstract»

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  • Ground plane impedance analysis of printed circuit board

    Publication Year: 1999, Page(s):712 - 715 vol.2
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    A theoretical and experimental analysis of ground planes impedance for printed circuit boards is presented. A frequency domain analysis of the impedance on flat conductors is done. The realistic electromagnetic effects are considered: the skin effect due to the finite conductivity of the plane and the confinement effect of the distribution of current lines at the contact points. The analytical res... View full abstract»

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  • Power density spectrum estimation of the random controlled PWM single-phase boost rectifier

    Publication Year: 1999, Page(s):803 - 805 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    Random modulation is of increasing interest in power electronics and also holds promise for reducing filtering requirements in AC/AC, DC/DC converter applications and reducing acoustic noise in motor drive applications. This paper deals with the power spectrum density (PSD) estimation methods of the random controlled pulse width modulation (RPWM) single-phase structured boost rectifier. Estimated ... 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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  • 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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  • Electromagnetic characterization of IWS harnesses

    Publication Year: 1999, Page(s):706 - 711 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    Implementation of integrated wiring system (IWS) architectures is advantageous due to weight savings, ease of automated manufacturing and centralization of component location. An IWS harness comprises layers of conductors separated by foils. Within a layer the position of each set of multiple conductors with respect to the other sets is unchanged over the harness length. Immunity from crosstalk is... 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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  • 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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  • 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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  • 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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  • 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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  • Prediction of RF environments worldwide for ground, airborne, and space launch trajectory applications via automated database

    Publication Year: 1999, Page(s):969 - 973 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    The evaluation of the radio frequency (RF) environment for electronic systems in the field has often been a time consuming and burdensome task, especially for mobile systems. This paper discusses a methodology for determining the RF environment for such systems using common office spreadsheet software. The model developed has been validated and used successfully to evaluate the RF environment on t... View full abstract»

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  • EMC compliance measurements per EN50083-2

    Publication Year: 1999, Page(s):700 - 705 vol.2
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    This paper addresses and summarizes the guidelines for EMC compliance measurements per EN50083-2:1995 (cabled distribution systems for television, sound, and interactive multimedia signals, Part 2. Electromagnetic compatibility for equipment) including Amendment A1:1997. As the technology advances, i.e., broadband cable systems, merging of the telephone/data lines over hybrid fiber, and the popula... 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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  • 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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  • 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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