By Topic

Electromagnetic Compatibility, IEEE Transactions on

Issue 4 • Date Nov. 1993

Filter Results

Displaying Results 1 - 16 of 16
  • Discussion of the relevance of transfer admittance and some through elastance measurement results

    Publication Year: 1993 , Page(s): 417 - 422
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (535 KB)  

    Transfer admittance for electromagnetic compatibility (EMC) prediction is reviewed. A method for measuring the transfer admittance of cables is presented. Some experimental results are given for coaxial cables. Although the through elastance is not measurable, the authors show that it is at least one order of magnitude smaller than what current theory predicts.<> View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Comment on "On the use of the Hilbert transform for processing measured CW data

    Publication Year: 1993
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (116 KB)  

    The commenter suggests that P.M. Tesche, in the above-titled paper (ibid., vol.34, no.3, p.259-66, Aug. 1992), conveys the impression that the Cauchy residue theorem, when applied to a function of a complex variable, leads to a Hilbert transformation relationship between the real and imaginary parts. The commenter clarifies this relationship.<> View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An iterative method for calculating the shielding effectiveness and light transmittance of multilayered media

    Publication Year: 1993 , Page(s): 451 - 456
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (532 KB)  

    A simple, rapid, and accurate numerical method is presented for calculating the shielding effectiveness and the light transmittance of multilayered media. A uniform treatment is used to obtain the shielding effectiveness of the layers at microwave frequencies and their light transmittance at optical frequencies. The method is completely general and does not involve any approximation. It can be applied at any frequency, for vertical or oblique incidence, to lossless or lossy, isotropic or anisotropic media consisting of any number of dielectric and metallic layers. In order to illustrate the versatility of the method, the shielding effectiveness and the light transmittance of two different structures consisting of a gold film deposited over a plastic substrate and of a plastic substrate sandwiched between two gold films are analyzed under different conditions View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Numerical analysis technique for diode-loaded dipole antennas

    Publication Year: 1993 , Page(s): 480 - 483
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (312 KB)  

    A circuit model for a double-loaded dipole electric field measurement probe that is valid for frequencies below 10 GHz is developed. A nonnegligible dipole radius and the nonlinear characteristics of the diode are taken into consideration. The dipole lumped-circuit elements and diode capacitances are determined by theoretical means, while the diode V-I characteristics and resistance are determined by a combined theoretical and empirical approach. Newton's iteration method is used to numerically solve the resulting nonlinear differential equation. Experimental measurements on a probe designed for operation between 1 and 1000 MHz are reported and compared with the theoretical results View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Pitfalls of staircase meshing

    Publication Year: 1993 , Page(s): 434 - 439
    Cited by:  Papers (27)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (504 KB)  

    The authors demonstrate that staircased approximations to curved or oblique electromagnetic interfaces yield poor accuracy unless the user has truly unlimited computer resources for two simple geometries: a conducting strip and a circular conducting cylinder. Conformal meshing reduces by a factor of four the resolution required in each direction. A conformally meshed circular cylinder model yields good radar cross section (RCS) predictions with only eight cells per wavelength View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Target signature using nonsinusoidal radar signals

    Publication Year: 1993 , Page(s): 457 - 465
    Cited by:  Papers (5)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (736 KB)  

    A target recognition method that utilizes both target length determined from target signature duration for target classification and target shape determined from target signature amplitude variation for target identification is presented. The transformation of the target axes coordinate system into a rotated coordinate system enables target recognition at any aspect angle. The information obtained about target shape and size, in addition to the velocity information supplied by the Doppler effect, can be used to generalize Woodward's ambiguity function to a range-velocity-shape resolution function. Thumbtack range-velocity-shape resolution functions are easily obtained by increasing the number of pulses in the transmitted radar signal View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An improved method of measuring power-line impedances using two current probes

    Publication Year: 1993 , Page(s): 473 - 475
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (244 KB)  

    A modified calibration model for the two current probe method of measuring power-line impedances which extends the use of this method up to 500 MHz is presented. The model is based on a generalized S-parameter equivalent circuit of the measurement system. Experimental verification of the accuracy of the model is given View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Correlation between shielding effectiveness measurements and alternative methods for the characterization of shielding materials

    Publication Year: 1993 , Page(s): 440 - 444
    Cited by:  Papers (13)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (324 KB)  

    The correlation between different methods for the characterization of shielding materials is discussed. It is found that a good agreement is obtained using basic methods, such as a four-point resistance measurement, or standard shielding effectiveness methods and using other methods allowing a quick control in the field during injection moulding process View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Resonant attenuation in electromagnetic wave scattering from conducting elongated objects

    Publication Year: 1993 , Page(s): 466 - 472
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (524 KB)  

    The authors study the resonant attenuation as determined by the imaginary parts of the complex eigenfrequencies of perfectly conducting elongated objects: spheroids, cylinders with flat ends, and cylinders with hemispherical endcaps. Complex resonance frequencies are obtained from the principle of phase matching of surface waves. For the case in which these surface waves are generated by plane waves at broadside incidence, the simultaneous presence of cylindrical circumferential-wave resonances and of the resonances of meridionally propagating surface waves is discussed View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Characterization of a nonohmic RF-insensitive solid-state ignition element

    Publication Year: 1993 , Page(s): 475 - 478
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (416 KB)  

    A monolithic solid-state electro-explosive initiator which consists of Schottky barriers or p-n junctions fabricated on opposite sides of a silicon wafer is discussed. Thermal characterization of the structure was performed during radio frequency excitation to demonstrate RF insensitivity View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On Harmuth's `correction' of Maxwell's equations for pulse transmission in lossy media

    Publication Year: 1993 , Page(s): 486 - 487
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (180 KB)  

    It is shown that H.F. Harmuth's magnetic conductivity term is not needed to predict the transient response for plane-wave transmission in a homogeneous lossy medium. Thus, his repeated harsh criticisms of S.A. Stratton's classic analysis using Laplace transforms are not justified View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Comparison of coupling mechanisms on multiconductor cables

    Publication Year: 1993 , Page(s): 409 - 416
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (696 KB)  

    Five possible types of coupling on multiconductor cables are identified. The magnitudes of three new types of couplings are assessed for different simple cables. A complete example of field-to-cable coupling calculation, including the five types of coupling, is presented. An experiment reproducing the setup considered in this calculation was carried out. The results shows that one of the couplings described by the parallel transfer impedance is present and dominates the cable response in certain cases View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Measuring the transfer impedance and admittance of a cylindrical shield using a single triaxial or quadraxial fixture

    Publication Year: 1993 , Page(s): 445 - 450
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (408 KB)  

    An experimental procedure is proposed for quickly measuring both the transfer impedance and admittance of cylindrical shields using a single triaxial or quadraxial fixture. The approach is demonstrated for circular apertures, longitudinal slots, and longitudinal strips. It is anticipated that this approach can be used to completely characterize shield faults that are intentionally introduced to increase the electromagnetic coupling to interior circuits in order to demonstrate hardness margin View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Time-domain measurements of the electromagnetic backscatter of pyramidal absorbers and metallic plates

    Publication Year: 1993 , Page(s): 429 - 433
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (436 KB)  

    A wideband time-domain measurement system has been developed for the evaluation of the backscatter performance of dissipative macrostructures. Backscatter measurements have been performed in an ordinary room environment on metal plates as well as samples of pyramidal absorbing material. The backscattering performance of pyramidal absorbers is evaluated in the 50- to 1000-MHz frequency range with a varying incident field angle of incidence. In the case of rectangular metal plates, numerically generated results are compared with measured data in order to gauge the accuracy of the system View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Preforming an electromagnetic field of the axis of a conducting cylinder

    Publication Year: 1993 , Page(s): 479 - 480
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (156 KB)  

    An analytical method is described for producing a given spatial form of the electric field along the axis of a conducting homogeneous cylinder. The required excitation on the surface of the cylinder is determined. A confirming forward calculation is also shown using a discrete array of circumferential slots cut in an encasing cylindrical metal sheath View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • UTD propagation model in an urban street scene for microcellular communications

    Publication Year: 1993 , Page(s): 423 - 428
    Cited by:  Papers (45)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (436 KB)  

    A three-dimensional propagation model for microcellular communications in an urban street scene is presented. The model is based on the uniform theory of diffraction (UTD) and takes into account multiple wall-to-wall, wall-to-ground, and ground-to-wall reflections, the diffraction from corners of buildings, and subsequent reflections from such diffracted signals. The ray geometry is made extremely complex by the presence of ground reflections and the many combinations of sequences of reflections or diffractions from walls, edges, and ground. At each reflection or diffraction point, the local ray-fixed coordinate system or edge-fixed coordinate system is used together with appropriate dyadic reflection or diffraction coefficient matrices. The theoretical results for the signal path loss along the streets are compared with measurements done in New York and Tokyo for various values of the propagation parameters. Agreement with these measurements indicates that the UTD formulation is a good model for such urban communication applications View full abstract»

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

Aims & Scope

IEEE Transactions on Electromagnetic Capability publishes original and significant contributions related to all disciplines of electromagnetic compatibility (EMC) and relevant methods to predict, assess and prevent electromagnetic interference (EMI) and increase device/product immunity.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Professor Farhad Rachidi
Swiss Federal Institute of Technology (EPFL)
EMC Laboratory
CH-1015 Lausanne
Switzerland
Phone: +41 (0) 21 693 26 20 (direct)
+41 (0) 21 693 26 61 (secretariat)
Fax: +41 (0) 21 693 46 62
Email: Farhad.Rachidi@epfl.ch
url: http://emc.epfl.ch