By Topic

Electromagnetic Compatibility, IEEE Transactions on

Issue 6 • Date Dec. 2012

Filter Results

Displaying Results 1 - 24 of 24
  • Table of Contents

    Page(s): C1 - 1193
    Save to Project icon | Request Permissions | PDF file iconPDF (74 KB)  
    Freely Available from IEEE
  • IEEE Transactions on Electromagnetic Compatibility publication information

    Page(s): C2
    Save to Project icon | Request Permissions | PDF file iconPDF (134 KB)  
    Freely Available from IEEE
  • From the Outgoing Editor-in-Chief

    Page(s): 1194
    Save to Project icon | Request Permissions | PDF file iconPDF (84 KB)  
    Freely Available from IEEE
  • The Effect of Diode Response of Electromagnetic Field Probes for the Measurements of Complex Signals

    Page(s): 1195 - 1204
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (5045 KB) |  | HTML iconHTML  

    Diode detectors present inside electromagnetic field probes are typically calibrated for linearity using continuous sinusoidal waveforms (CW). In this paper, it is shown that CW linearization is not adequate for the measurement of complex wireless communication signals with high peak-to-average power ratios. While previous analog and digital communication signals (1G and 2G) can be more easily corrected for linearity, newer 3G and 4G communication protocols employ complex modulations with stochastic signal envelopes. As a result, proper linearization depends on the diode response and signal characteristics, and large errors results if CW linearization is used. The errors introduced when measuring such signals with probes employing CW linearization are quantified in this paper. A numerical model of the diode response is provided and validated against measurements. Errors due to CW linearization can exceed 2 dB, whereas linearity errors within 0.4 dB are attainable using the proposed calibration procedures for even increased dynamic ranges. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Novel Method of Ambient Interferences Suppressing for In Situ Electromagnetic Radiated Emission Test

    Page(s): 1205 - 1215
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3070 KB) |  | HTML iconHTML  

    A measurement method for adaptive interference suppression in in situ radiated emission test is proposed. First, the method obtained multichannel data to achieve the signal directions of arrival from equipment under test (EUT) and interference sources by the spatial spectrum estimation technique based on the multiple signal classification algorithm. Second, broadband minimum variance distortionless response (MVDR) beamforming algorithm combined with short time Fourier transform (STFT) was taken to form the beam pattern null traps in the directions of interferences, thus realizing the suppression on interferences. The factors affecting the accuracy of spatial spectrum estimation and the angular resolution of beamforming were discussed, and the suppression effects on different kinds of interferences were simulated. The simulation results show that the method can suppress multiple interferences, which are either narrowband or broadband, continuous or transient, and avoid little distortion to the time-frequency characteristics of EUT signal simultaneously. The method performance was evaluated by experiments. The results show that sine wave and pulse modulation interferences can both be suppressed remarkably, which proves the effectiveness and advantage of this new method for electromagnetic compatibility in situ test. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • EMC Protection of SCB Explosive Devices by Using SMD-Based NTC Thermistors

    Page(s): 1216 - 1221
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (637 KB) |  | HTML iconHTML  

    This paper proposes a surface mount device-based negative temperature coefficient thermistor as an electromagnetic compatibility protection element for semiconductor bridge (SCB) explosive devices. Because of the small size, it can be integrated into the ceramic housing of the SCB without increasing packaging size and affecting normal firing conditions of SCB. This paper demonstrates the usefulness of the protective method by firing experiments, temperature measurements, and RF sensitivity tests. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Modeling Methodology of Automotive Electronic Equipment Assessed on a Realistic Subsystem

    Page(s): 1222 - 1233
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1313 KB) |  | HTML iconHTML  

    Conducted disturbances induced into automotive electronic equipment can be predicted in the early design phase by numerical simulation. This supposes a realistic modeling of the cable harness, as well as the electronic equipment. This paper evaluates a modeling method by the results obtained on a realistic automotive subsystem. The latter is composed of two pieces of electronic equipment connected to each other by a cable harness. This test case was performed on printed circuit boards (PCBs) with full or partial ground planes and using a representative sample of harnesses. Simulation results are compared with measurement results using multiple cable harness samples. A good agreement between measurement and simulation can be obtained for PCBs with full ground plane, provided that fringing effects of the electronic components are taken into account in the equipment model. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • FDTD Simulation of Lightning Surges on Overhead Wires in the Presence of Corona Discharge

    Page(s): 1234 - 1243
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1155 KB) |  | HTML iconHTML  

    A simplified model of corona discharge for finite-difference time-domain (FDTD) computations has been applied to analyzing lightning surges propagating along overhead wires with corona discharge. The FDTD computations simulate the experiments of Inoue and Wagner . In Inoue's experiment, a 12.65-mm radius, 1.4-km-long overhead wire was employed, and in Wagner 's experiment, a 21- or 25-mm radius, 2.2-km-long overhead horizontal wire was employed. The critical electric field on the surface of the 12.65-mm-radius wire for corona initiation is set to E0 = 1.4, 2.4, or 2.9 MV/m, and those for 21- and 25-mm-radius wires are set to E0 = 2.2 and 2.1 MV/m, respectively. The critical background electric field for streamer propagation is set to Ecp = 0.5 MV/m for positive voltage application and Ecn = 1.5 MV/m for negative voltage application. The FDTD-computed waveforms (including wavefront distortion and attenuation at later times) of surge voltages at three different distances from the energized end of the wire agree reasonably well with the corresponding measured waveforms. Also, the FDTD-computed waveforms of surge voltages induced on a nearby parallel bundled conductor agree fairly well with the corresponding measured waveforms. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fast Numerical Evaluation of the Horizontal Electric Field Radiated by a Lightning Channel Using the Moment Technique

    Page(s): 1244 - 1251
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (455 KB) |  | HTML iconHTML  

    The evaluation of the electromagnetic field radiated by a lightning stroke channel is a necessary step for the analysis of many electromagnetic compatibility problems. An efficient algorithm for calculating the electromagnetic field of a lightning stroke channel is presented in this paper. The electromagnetic field of a lightning stroke channel, expressed by the generalized Sommerfeld integral, is decomposed into two parts. One is a definite integral, which can be evaluated using the proposed moment technique to avoid the troublesome oscillatory integral; the other is an improper integral with an infinite upper limit, which is calculated with the newly developed asymptotic expression to reach convergence quickly. The proposed approach turns out to be very efficient. The numerical examples validate the proposed approach in both frequency and time domain. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Transient Excitation of Rectangular Resonators Through Electrically Small Circular Holes

    Page(s): 1252 - 1259
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (614 KB) |  | HTML iconHTML  

    In this paper, analytical solutions of response functions for rectangular resonators are investigated in time domain. Emphasis is placed on the study of electromagnetic field coupling to a 3-D cavity through a small circular aperture. The time-dependent parts of the resulting modal Green's functions exhibit typical behavior that is inherent in all resonating/oscillating linear physical systems: namely, they fulfill oscillating ordinary differential equations at any point of the considered resonator. Their solutions contain transient and steady-state parts. The transient parts of the response functions will become important for electromagnetic compatibility tests in particular of modern digital high-speed electronics. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Time-Domain Electric Current Formulation for the Analysis of Arbitrarily Shaped Dielectric Bodies

    Page(s): 1260 - 1268
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (889 KB) |  | HTML iconHTML  

    In this paper, we present a novel stable time-domain procedure to analyze the transient electromagnetic response from 3-D dielectric bodies. The principal method is based on the application of electric- and magnetic-field boundary conditions on the surfaces of homogeneous structures while considering the electric currents as unknowns. Triangular patches as well as quadrangular patches model the surface of the composite body. The method of moments is implemented to solve the resultant integral equations. The scattered electromagnetic fields that are dependent only on the electric surface currents are computed with less effort compared with other methods, which use both equivalent electric and magnetic surface currents. Comparing these methods, also our innovative method reduces the number of the submatrix elements by considering them as zero, when dealing with more than one homogeneous body, or combined PEC and body structures. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Numerical Procedure for the Analysis of EMC/EMI Problems in Radio Communication Systems Operating in Complex Environments

    Page(s): 1269 - 1280
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2893 KB) |  | HTML iconHTML  

    An efficient combined full-wave/high-frequency procedure useful to evaluate the spatial distribution of the electromagnetic field excited by radio sources operating in complex environments is presented. The procedure is based on a full-wave technique for the evaluation of the field distribution excited within a volume surrounding the radiating sources, and a dedicated high-frequency technique useful to model the propagation and interaction of the electromagnetic field with electrically penetrable objects forming the operative environment. In this way, it is possible to determine, with a reduced computational burden, the field distribution from the source location to the far-field region while keeping a high numerical accuracy. Using the proposed procedure, it is possible to evaluate the performance of mobile radio communication systems taking into account the impact of the operative environment, which is in turn essential to identify safety areas in compliance with the electromagnetic compatibility (EMC) regulations. Numerical examples aimed to predict potential EMC/EMI issues which could be caused by a mobile communication system operating in a complex scenario modeling a crisis area are also reported. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Analysis of Excited Multiconductor Transmission Lines Based on the Passive Method of Characteristics Macromodel

    Page(s): 1281 - 1288
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1170 KB) |  | HTML iconHTML  

    This paper presents a time-domain macromodel for lossy multiconductor transmission lines exposed to electromagnetic interference. The proposed algorithm is based on the recently developed passive method of characteristics, which provides an efficient mechanism to ensure the passivity of the macromodel for different line lengths. Numerical examples illustrate that when compared to other passive incident field coupling algorithms, the proposed method is efficient in modeling electrically long interconnects since delay extraction without segmentation is used to capture the frequency response. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An Effective Approach for High-Frequency Electromagnetic Field-to-Line Coupling Analysis Based on Regularization Techniques

    Page(s): 1289 - 1297
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (965 KB) |  | HTML iconHTML  

    An effective method based on the regularization technique to solve the problem of the high-frequency electromagnetic field coupling to an overhead transmission line is presented. The integral-differential equation describing the field-induced current into a line of finite length, is solved by expressing the unknown by means of the Fourier series. The Landweber iterative method is then used to determine the series coefficients. The proposed method is tested taking as reference numerical results obtained using the numerical electromagnetics code (NEC). The obtained results using the proposed approach are found to be in excellent agreement with those obtained using NEC. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Application of Reproducible Measurements of Complex Permittivities to Crystalline Lens From 500 MHz to 50 GHz

    Page(s): 1298 - 1301
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (590 KB) |  | HTML iconHTML  

    Most of fundamental biological tissues and organs, such as skin, muscle, and brain, are wet and solid. Water evaporation on the sample surfaces generally deteriorates the measurement of complex permittivities, especially in quasi-millimeter wave and millimeter wave bands. This letter, therefore, introduces a new sample preparation procedure for avoiding the water-evaporation effect. This method is first validated with liquid biological tissue, i.e., whole blood, and then applied to a wet and solid biological tissue, i.e., crystalline lenses. The results show that the new method enables reproducible measurements of the complex permittivities of wet and solid biological samples. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Quasi-Static Inductance of Vertical Interconnections in Parallel-Plane Structures

    Page(s): 1302 - 1305
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (345 KB) |  | HTML iconHTML  

    Vertical interconnections between parallel planes often determine the signal- and power-integrity performance on printed-circuit-boards (PCBs). The quasi-static inductance of the port is an important parameter of the port RF impedance. In contrast to recent approaches based on a low-frequency approximation of the exact impedance solution, this letter presents a straightforward quasi-static approach. Besides the physical insight and interpretation, it establishes a general solution method, in terms of a magnetostatic boundary value problem for the quasi-static vector potential. It is found that a unique definition of the port inductance is provided by the vector potential and its average value. The result for a circular model as well as for the rectangular structure is in full agreement with the corresponding low-frequency approximations of the exact modal solution. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On Independent Platform Sample Number for Reverberation Chamber Measurements

    Page(s): 1306 - 1309
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (467 KB) |  | HTML iconHTML  

    The turn-table platform stirring technique is used to improve the measurement accuracy of a reverberation chamber (RC). It is usually assumed that the half-wavelength platform spatial sampling results in independent samples, which can be used to approximate the independent platform sample number. But the approximation is rather coarse. This paper presents a measurement-based method to determine the independent platform sample number. This method is simple and accurate. In contrast to the half-wavelength coarse approximation that depends only on frequency, this method in addition illustrates the dependence of the independent platform sample number on RC loading and mode stirring. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An Iterative FDTD/MoM Technique for Assessing Coupling Effects in Front of Base-Station Antennas

    Page(s): 1310 - 1313
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (518 KB) |  | HTML iconHTML  

    In this study, we used an iterative numerical technique, which combines the finite-difference time-domain (FDTD) method with the method of moments (MoM), to investigate the coupling effect between a base-station antenna operating at 900 MHz and a worker in front of it. The numerical model of the antenna was a realistic representation of a commercially available array of dipoles, whereas for the worker a numerical phantom at 5 mm resolution, created from medical imaging of an adult male, was used. Rao-Wilton-Glisson (RWG) triangular elements were employed in the implementation of the MoM used to solve for the surface currents on the antenna structure. The total-field scattered-field formulation of FDTD was used in the computational domain, which contained the numerical phantom of the worker. An intermediate Huygens surface was introduced to establish an iterative procedure, which allowed us to calculate the influence of the human body on the radiating dipoles. It was found that using this iterative approach the whole body absorption near the antenna varied from the case when no coupling was considered. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Why a Reverberation Chamber Works at Low Modal Overlap

    Page(s): 1314 - 1317
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (383 KB) |  | HTML iconHTML  

    The physical parameter well adapted to assess the degree of overmodedness of a reverberation chamber (RC) is the number MM of modes overlapping in a mode bandwidth. The lowest usable frequency of an RC often corresponds to a low modal overlap of one or two modes. Notwithstanding, in spite of this poor number of modes the RC still works. We show, using Monte Carlo simulation, that the number of modes must, in fact, not be restrained to MM and that the number of modes contributing to the field statistics can be, even at low modal overlap, somewhat larger than expected. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Concerning Channel Base Current Functions for Lightning Studies

    Page(s): 1318 - 1320
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (541 KB) |  | HTML iconHTML  

    Analysis of channel base current functions with specific reference to new channel base current (NCBC) function is reported. The main concern has been of adjusting the maximum time rate of change of lightning current (di/dt)max along with time to crest tm. A new ratio (maximum time rate of change of lightning current (di/dt)max by average time rate of change of lightning current (di/dt)avg) has been defined. The critical numerical value for this ratio is identified as 1.7 for NCBC function. The performance of NCBC function is compared with Heidler's function in the wave front region. View full abstract»

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

    Page(s): 1321 - 1322
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (52 KB)  

    Lists the reviewers who contributed to IEEE Transactions on Electromagnetic Compatibility. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 2012 Index IEEE Transactions on Electromagnetic Compatibility Vol. 54

    Page(s): 1323 - 1344
    Save to Project icon | Request Permissions | PDF file iconPDF (444 KB)  
    Freely Available from IEEE
  • IEEE Transactions on Electromagnetic Compatibility information for authors

    Page(s): C3
    Save to Project icon | Request Permissions | PDF file iconPDF (29 KB)  
    Freely Available from IEEE
  • IEEE Transactions on Electromagnetic Compatibility institutional listings

    Page(s): C4
    Save to Project icon | Request Permissions | PDF file iconPDF (19 KB)  
    Freely Available from IEEE

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