By Topic

Electromagnetic Compatibility, 2009 20th International Zurich Symposium on

Date 12-16 Jan. 2009

Filter Results

Displaying Results 1 - 25 of 136
  • [Front cover]

    Page(s): 1
    Save to Project icon | PDF file iconPDF (84 KB)  
    Freely Available from IEEE
  • [Front matter]

    Page(s): 1 - 2
    Save to Project icon | PDF file iconPDF (124 KB)  
    Freely Available from IEEE
  • [Front cover]

    Page(s): 1
    Save to Project icon | PDF file iconPDF (568 KB)  
    Freely Available from IEEE
  • Table of contents

    Page(s): 1
    Save to Project icon | PDF file iconPDF (522 KB)  
    Freely Available from IEEE
  • Table of contents

    Page(s): 1
    Save to Project icon | PDF file iconPDF (21 KB)  
    Freely Available from IEEE
  • Table of contents

    Page(s): 1 - 30
    Save to Project icon | PDF file iconPDF (119 KB)  
    Freely Available from IEEE
  • Author index

    Page(s): 1 - 10
    Save to Project icon | PDF file iconPDF (49 KB)  
    Freely Available from IEEE
  • Author index

    Page(s): 1 - 59
    Save to Project icon | PDF file iconPDF (185 KB)  
    Freely Available from IEEE
  • [Breaker page]

    Page(s): 1
    Save to Project icon | PDF file iconPDF (113 KB)  
    Freely Available from IEEE
  • [Front matter]

    Page(s): 1 - 40
    Save to Project icon | PDF file iconPDF (3135 KB)  
    Freely Available from IEEE
  • Information for authors

    Page(s): 1
    Save to Project icon | PDF file iconPDF (18 KB)  
    Freely Available from IEEE
  • Information for authors

    Page(s): 1 - 3
    Save to Project icon | PDF file iconPDF (194 KB)  
    Freely Available from IEEE
  • Information for authors

    Page(s): 1
    Save to Project icon | PDF file iconPDF (70 KB)  
    Freely Available from IEEE
  • LCL and Common Mode Current at the Outlet Do Not Tell the Common Mode Current Generated at the Remote Unbalanced Element on the Power-line

    Page(s): 1 - 4
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (105 KB) |  | HTML iconHTML  

    The radiated emission from the power-line communications (PLC) is primarily caused by the common mode (CM) current converted from the differential mode (DM) current at the remote unbalanced elements (RUE) distributed on the power-line. The LCL measured at the outlet (outlet LCL) is often used as a measure of the unbalance despite the negative results. To resolve the issue, we have formulated the transmission line theory of the LCL and the CM current due to the mode conversion at an RUE on the power-line. We have shown that the outlet LCL underestimates the CM current at the RUE due to the CM propagation loss between the outlet and the RUE. We have also shown that the CM current measured at the modem output can be arbitrarily reduced by increasing the CM impedance of the modem without reducing the radiated emission. This is a fatal loophole of the CM current based regulations. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Radiation and disturbance mitigation in PLC networks

    Page(s): 5 - 8
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1578 KB) |  | HTML iconHTML  

    This paper presents the last results obtained over a four-year, in-depth study of the mechanisms of parasitic EMC emissions generated by an in-house PLC network. Common mode current generation and its effect on the parasitic field emissions is the core of this paper. Numerical simulations and experimental measurements of a 1:1 scale representative room built on a CISPR 16 compliant Open Area Test Site, followed by a measurement campaign in real electrical house network, allowed us to develop devices, called "plugins" in the following document. The latest, as it will be shown, have proven their capability in term of radiation reduction. Our results indicate that the common-mode current generated along the power-line cables and its associated magnetic field, are mainly due to electrical asymmetries. These one can be reduced by the insertion of the above-mentioned plugins in wall outlet and reduce as well the magnetic field from 6 to 10 dB. A key factor of this study has been the development of a statistical measurement method that has reduced by a 4 fold factor the field measurement time, at the cost of only a 3 dB max error. This method is able to overcome the high variability of the magnetic field in a determined space which makes difficult to evaluate the disturbance potential of a setup from measurements of the magnetic field at a single point. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Mode-Port-Network Approach to Analyze Power-Line EMC Problems for PLC

    Page(s): 9 - 12
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (347 KB) |  | HTML iconHTML  

    In Japan, a power-line communication (PLC) is in use as an indoor system in the frequency band of 2 MHz to 30 MHz. However, the radiated emission in this frequency band, which is caused by the common-mode current generated in the power-line systems, is a serious matter. To analyze the high-frequency behavior of the line system, a two-port-network model using differential-and common-mode ports is proposed here. As an example, the network-function expression is effectively used to analyze characteristics such as longitudinal conversion loss (LCL), induced common-mode currents in a power line having a load circuit, and an impedance stabilization network 1 (ISN1) attached to a PLC modem. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Two Antennas for Differential Mesoband Operation

    Page(s): 13 - 16
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (168 KB) |  | HTML iconHTML  

    The use of differential high-power sources gives another degree of freedom to antenna design, including two-element arrays. Symmetry considerations are discussed in the context of helical antennas for circular and linear polarizations. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Corona Charged Subnanosecond Impulse Generator

    Page(s): 17 - 20
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (321 KB) |  | HTML iconHTML  

    An impulse generation system based on the floating electrodes corona charging mechanism is presented. Measurement results demonstrate that it is possible to obtain sub nanosecond impulses with this novel charging technique. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Electromagnetic Emission of Pulsed Plasma Thrusters

    Page(s): 21 - 24
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (186 KB) |  | HTML iconHTML  

    This paper deals with the measurement of characteristics of electromagnetic emission of electric propulsions as applied to the EMC problems. Electric propulsion systems on the basis of pulsed plasma thrusters, which are used for the orbit correction of small satellites, are considered as the sources of unintended noise of artificial origin. Test results for the spectral characteristics of emission for the PPT model with the discharge energy of 50 J obtained under ground conditions and their discussion are presented in this paper. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Applications of the Dirichlet-to-Neumann Boundary Operator in Transmission Line Modeling

    Page(s): 25 - 28
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (134 KB) |  | HTML iconHTML  

    The DtN operator is a useful tool in the characterization of interconnect structures. In combination with the Method of Moments, it can be used for transmission line modeling or to directly determine the internal impedance of conductors. This paper presents a new calculation method for the Dirichlet-to-Neumann (DtN) boundary operator, in the important case of a rectangular block, based on the superposition of slab waveguide modes. Especially for its non-differential form, some numerical issues need to be addressed. It is further explained how the DtN operator can be determined for composite blocks. The theory is illustrated by some numerical examples. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Method for Efficient Computation of Time Domain Surface Impedances of A Lossy Half Space

    Page(s): 29 - 32
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (187 KB) |  | HTML iconHTML  

    In this paper, an efficient technique is developed to solve the inverse transform of exact closed form representations of frequency domain surface impedances, without pursuing tedious and complicated mathematical manipulations. This technique is based on the numerical inversion of the Laplace transform and has the advantages of simple programming, computational efficiency and easy error control. The numerical results agree very well with those published in the literature, validating the effectiveness of this technique. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Analysis of stochastic resonances in electromagnetic couplings to transmission lines

    Page(s): 33 - 36
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (414 KB) |  | HTML iconHTML  

    Resonances present in coupling phenomena between a randomly varying thin-wire transmission-line, and an electro-magnetic field are stochastically characterized. This is achieved by using the first 4 statistical moments in order to appreciate the intensity of the resonance phenomena. The stochastic method proposed is applied to a thin-wire transmission line connected to a variable impedance, and, undergoing random geometrically localized perturbations. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Simulation of Corrugated Coaxial Cables using the Meshless Radial Point Interpolation Time-Domain Method

    Page(s): 37 - 40
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (207 KB) |  | HTML iconHTML  

    Meshless numerical simulation methods are gaining attention in different research fields. The ability for conformal and multi-scale modelling as well as the potential for a dynamic node adaptation make them interesting for many applications. The meshless radial point interpolation method (RPIM) in time-domain is proposed here as a versatile simulation technique for electromagnetic problems. In this framework, a conformal boundary treatment is described and validated in a 2D cylindrically symmetric arrangement. These conformal boundaries can be applied for example to simulate the influence of production tolerances or manufacturing properties in corrugated coaxial copper cables. Reflections arising from ripples of a corrugated copper cable are analyzed in particular here and the simulation results exhibit a perfectly linear dependence in a log-log plot between the reflected energy and the extent of the corrugation. The obtained results are validated successfully through comparison with a finite-element solution of the problem. Finally, the phase and amplitude variations of a sinusoidal signal propagating in the corrugated cable are characterized. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Proposition of tolerance requirements adapted for the calibration of a reverberation chamber

    Page(s): 41 - 44
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (164 KB) |  | HTML iconHTML  

    This paper aims to propose an evolution of tolerance requirements for calibrating a reverberation chamber (RC). Instead of the normative threshold of 3 dB, even more for lower frequencies, we propose a confidence interval based on distribution functions of electric field measurements. Moreover, this involves to take into account the number of independent stirrer positions and the number of probe locations, which are defined in the measurement setup. The proposed requirements are based on measurements. We increase the complexity of the study in a progressive manner in order to propose a more realistic confidence interval. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Field Uniformity Investigation of Reverberation Chamber at Calibration Stage

    Page(s): 45 - 48
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (236 KB) |  | HTML iconHTML  

    Field uniformity of our developed reverberation chamber is investigated at calibration stage. The influence of the transmit antenna and the work volume is analyzed and evaluated according to the measurement data. Calibrations with different transmit antenna positions, directions, heights, and dimension of work volume are measured carefully. Field uniformity is analyzed in detail. It is indicated that transmit antenna positions, direction, heights, and dimension of work volume have insignificant influence on the test repeatability of calibrations. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.