IEEE Transactions on Electromagnetic Compatibility

Issue 2 • June 1968

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Displaying Results 1 - 25 of 31
  • Table of contents

    Publication Year: 1968, Page(s): c1
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    Freely Available from IEEE
  • IEEE Electromagnetic Compatibility Group

    Publication Year: 1968, Page(s): c2
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  • Survey [special filter issue]

    Publication Year: 1968, Page(s):181 - 186
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1998 KB)

    The special filter issue (consisting of 25 tutorial, state of the art, and summary papers) aims systematically at converting filtering for EMC from an art into a science. In contrast to conventional filtering, operating under well defined simple premises, filtering for EMC often requires a broad perspective for lack of normally occurring constraints. The first part, pertaining to filtering conditi... View full abstract»

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  • Microwave Filters to Combat RF Interference

    Publication Year: 1968, Page(s):187 - 196
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6544 KB)

    Microwave filters are useful to combat radio-frequency interference. A large variety of filter structures and design techniques are now available to the designer. The purpose of this paper is to review these filter types, both for high-power and low-power applications. View full abstract»

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  • The Modern Network Theory Approach to Microwave Filter Design

    Publication Year: 1968, Page(s):196 - 209
    Cited by:  Papers (6)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3880 KB)

    A review of the modern network theory approach to microwave filter design based on Richards' transformation is given. Basic concepts are discussed, including the use of Kuroda's identities and the specialized theory of optimum filter forms. Applications of the theory presented to elliptic-function filters, special rejectiontype filters, and multiplexers are given. Throughout the presentation, emph... View full abstract»

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  • Synthesis of RC Bandpass Filters

    Publication Year: 1968, Page(s): 209
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (147 KB)

    For the first time a method of designing RC bandpass filters is presented. The method consists of two steps. The first step is a scheme to locate the necessary poles and zeros that are RC realizable to produce certain bandpass characteristics. The second step is the synthesis of RC networks to produce these poles and zeros. In the first step, the conformal transformati begin{equation*}s(z) = {left... View full abstract»

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  • Active RC Synthesis for Significant Reduction in Magnitudes of Reactive Elements

    Publication Year: 1968, Page(s): 210
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (199 KB)

    Low impedance levels and/or large system time constants lead to network realizations with large total reactance values in ordinary passive and active RC synthesis. It is shown how active RC networks may, instead, be designed, in which one may freely a priori specify the total capacitance and the input and output resistances. The basic design philosophy is to assign relatively faroff poles to the p... View full abstract»

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  • Introduction to Digital Filters

    Publication Year: 1968, Page(s):210 - 220
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2257 KB)

    The purpose of this paper is to provide an introduction to the use of digital filters. Their capabilities and limitations are discussed, as well as application requirements as direct replacements for conventional active or passive filters in real-time situations. Basic operating principles are described, and amplitude and phase characteristics are illustrated. The technique offers many advantages ... View full abstract»

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  • Design of Wide-Band Sampled-Data Filters

    Publication Year: 1968, Page(s): 221
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (229 KB)

    The frequency domain of wide-band linear sampleddata filters is considered. The sampled-data filter is termed "wideband" when the frequency range of useful approximation to its continuous counterpart approaches half the sampling frequency. Sampled-data filter representations for continuous filters can be obtained using several different design procedures.[1] A particular design method utilizing th... View full abstract»

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  • Digital Filter Design Techniques in the Frequency Domain

    Publication Year: 1968, Page(s): 221
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (229 KB)

    In digital filtering, the spectrum is shaped using digital components as the basic elements. Although the physical realization is different, the aims of digital filtering are, thus, the same as those for continuous filtering. It is likely that digital filtering, already in extensive use for computer simulation of analog filters, will find increasing real-time application. Real-time digital filters... View full abstract»

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  • Curing Interference in Relay Systems

    Publication Year: 1968, Page(s): 222
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (225 KB)

    A review is made of methods for EMI suppression for relay coil transients and switch contact arcing. The mechanism of generation of coil transients and contact arcing is described briefly. A relay solenoid is controlled in actuation by a toggle switch S. In closing, the switch exhibits bounce characteristics which cause momentary deenergizing of the relay solenoid, with the subsequent momentary os... View full abstract»

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  • Compatible EMI Filters

    Publication Year: 1968, Page(s): 223
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (172 KB)

    A vexing problem in electromagnetic compatibility is the effective filtering of conducted interference from power-supply lines. Because of unavoidable and severe mismatch, conventional suppression filters operate only conditionally; such filters are often so large that they are omitted from the system. Three new classes of power-line filters without these limitations are described. They are active... View full abstract»

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  • Absorptive Lines as RFI Filters

    Publication Year: 1968, Page(s): 224
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    A new class of ":distributed constant" filters has been recently developed using the normal propagation path of the electrical current in a wire, a cable, or a line to suppress interference. The three basic characteristics are the following: 1) Instead of using lumped reactive components (inductors, capacitors) connected to the wire, one superposes the suppressive effect to the normal straight and... View full abstract»

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  • Electromagnetic Interference Reduction Filters

    Publication Year: 1968, Page(s):225 - 232
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1443 KB)

    This paper presents the theory and application of lumped-image parameter reactive filter networks, absorptive-type filter networks, and combined absorptive-reactive filter networks as conducted electromagnetic interference reduction circuits. A comparison of the passband characteristics by specific examples is given for filter configurations of the pi, T, absorptive, and absorptive-reactive type u... View full abstract»

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  • The Scaled Shield Low-Pass Filter

    Publication Year: 1968, Page(s):233 - 238
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1081 KB)

    The circuit model recently developed for a shield shows that a typical shield passing signals up to the order of 100 Hz could be scaled to pass frequencies up to 100 MHz. The theory whereby this could be done for transformers from loosely to tightly coupled is developed herein. The theory has been verified for the loosely coupled transformer at frequencies from 100 Hz to 1 MHz, and for a moderatel... View full abstract»

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  • A Survey of Power-Line Filter Measurement Techniques

    Publication Year: 1968, Page(s):238 - 242
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (750 KB)

    Due to the inadequacy of existing standards to yield meaningful filter insertion loss data, a survey of recent developments in measurement techniques is made. Four techniques of filter insertion loss measurements are discussed, and the advantages and disadvantages pointed out with the view of establishing an effective method of filter performance evaluation. View full abstract»

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  • Power Filter Insertion Loss Evaluated in Operational-Type Circuits

    Publication Year: 1968, Page(s):243 - 255
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (7666 KB)

    Insertion losses of several different manufacturers' 100-ampere power filters were measured in the frequency range 100 Hz to 2 MHz and at a range of power current loads utilizing a newly developed current injection probe. The measurements were made using a technique which, in compliance with IEEE measurement standards, provides a constant voltage source in a filter-in filter-out measurement circui... View full abstract»

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  • New Dimensions in Measuring Filter Insertion Loss

    Publication Year: 1968, Page(s): 256
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (89 KB)

    The MIL-STD-220A 50-ohm resistive method of measuring filter insertion loss using buffer networks has successfully masked the deficiencies of filters for many years. The method of measuring filter insertion loss proposed herein overcomes all the shortcomings of previous standards. It can measure insertion loss with full-rated line currents flowing (up to 400 amperes), without being adversely affec... View full abstract»

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  • Correction to "TUSAECOM Contributions to Shielding Theory"

    Publication Year: 1968, Page(s): 256
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  • Two Worst-Case Insertion Loss Test Methods for Passive Power-Line Interference Filters

    Publication Year: 1968, Page(s):257 - 263
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2640 KB)

    The feasibility of two methods for determining the worst-case insertion loss of power-line interference filters is demonstrated. The first method makes use of injection and detection probes (transformers) which introduce an extremely small impedance (L ≈50 nH, R ≈ 3 mΩΩ) into the test circuit. The second method does not use injection and detection probes, thus elimi... View full abstract»

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  • Improving the Specifications for Power-Line Filters

    Publication Year: 1968, Page(s):264 - 268
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2552 KB)

    The most important requirement of a power-line filter is its insertion loss under load. This paper discusses methods of extending and improving the technique of measuring insertion loss as specified in MIL-STD-220A. It discusses present equipment limitations in MIL-STD-220A that restricts full-load tests to frequencies above 100 kHz and limits maximum current to 100 amperes. However, it is realize... View full abstract»

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  • A Low-Frequency Current Probe System for Making Conducted Noise Power Measurements

    Publication Year: 1968, Page(s): 269
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (210 KB)

    The two current probe technique of measuring conducted radio-frequency interference is a radical departure from conventional measurement techniques. The technique evolved from a dissatisfaction with present techniques, due to the lack of sufficient information obtained from measurements concerning the source of the interference. Normally, the wires concerned when testing for conducted interference... View full abstract»

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  • Passive Nonreciprocal HF Helicon Devices

    Publication Year: 1968, Page(s):270 - 272
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1124 KB)

    Ferrite isolators and circulators are well known at microwave frequencies but are low-frequency limited and cannot be used in the HF region (below 100 MHz). A different approach to the basic nonreciprocal mechanism is reported here. This approach makes use of solid-state plasma waves, so-called helicon waves, that are nonreciprocal by their nature. Isolators using these helicon waves have been bui... View full abstract»

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  • Frequency-Selective Limiters and Their Application

    Publication Year: 1968, Page(s):273 - 283
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2208 KB)

    The frequency-selective limiter is presented as an adaptive filter system element. The operating mechanisms of various types of frequency-selective limiters are described and classified. The transient response, small-signal suppression, and intermodulation characteristics are presented for comparison. The application of frequency-selective limiters in particular EMI situations is discussed, and re... View full abstract»

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  • Correlation Entering New Fields with Real-Time Signal Analysis

    Publication Year: 1968, Page(s): 284
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (162 KB)

    Correlation analysis is a convenient technique for deyrtmining the spectral characteristics of a signal or the similarity of two different signals. One point of a correlation function is the long-term average of the product of two functions of time. The complete function is generated when the delay between the two time functions is varied. For example, if one voltage V1(t) and another voltage V2(t... View full abstract»

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Aims & Scope

IEEE Transactions on Electromagnetic Compatibility 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
Prof. Ing. Antonio Orlandi 
University of L'Aquila
Email: antonio.orlandi@univaq.it