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Electromagnetic Compatibility, IEEE Transactions on

Issue 4 • Date Nov. 1973

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Displaying Results 1 - 25 of 26
  • Table of contents

    Publication Year: 1973 , Page(s): c1
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  • IEEE Electromagnetic Compatibility Group

    Publication Year: 1973 , Page(s): c2
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  • Editorial

    Publication Year: 1973 , Page(s): 157
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  • Image Theory Results for the Mutual Impedance of Crossing Earth Return Circuits

    Publication Year: 1973 , Page(s): 158 - 160
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (545 KB)  

    Suitable engineering expressions for the mutual impedance of crossing earth return circuits are derived by employing finitely conducting earth image theory techniques. It is shown that the image theory and previously derived analytical results, which are rather complicated, are in excellent agreement. View full abstract»

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  • ELF Earth Return Coupling Into Power Systems

    Publication Year: 1973 , Page(s): 160 - 165
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1273 KB)  

    With the advent of the U.S. Navy's proposed ELF Communications System (Sanguine System), which would use an earth-return circuit to excite the earth-ionosphere cavity, earth-return current coupling into power systems has become important. The theoretical basis for coupling into power distribution systems is developed. A comparison is made between measured and predicted values of the induced voltage. Techniques which are useful in eliminating the effects of the induced voltage are described. The effectiveness of these interference mitigation techniques is demonstrated by comparing measurements on actual systems. Finally, data on power system interference are developed for use in communication system design tradeoff studies. View full abstract»

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  • Mitigation of ELF Interference on Telephone Lines

    Publication Year: 1973 , Page(s): 166 - 171
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2084 KB)  

    To mitigate the inductive interference on telephone lines exposed to the electromagnetic environment generated by the SANGUINE System, the commercial telephone plant located in the vicinity of an experimental ELF antenna system in Wisconsin was modified by using neutralizing transformers. Compatible operation of telephone system during SANGUINE operation is assured by this technique as evidenced by the continuing virtually interference-free performance of the modified plant. View full abstract»

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  • ELF Earth Return Current Coupling

    Publication Year: 1973 , Page(s): 172 - 176
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (707 KB)  

    The theory for predicting the coupling between long line earth-return circuits and extremely low-frequency earth-return sources is reviewed. This theory is based on a uniform earth model. The electric fields predicted by this theory are then compared to a sampling of experimental data derived from long probe wire measurements. View full abstract»

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  • Walsh Function Generators for Minimum Orthogonality Error

    Publication Year: 1973 , Page(s): 177 - 180
    Cited by:  Papers (7)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2943 KB)  

    The design procedure of a new synchronous counter type of Walsh function generator for the generation of a set of Walsh functions with the least possible error in orthogonality is developed. Each flip-flop of the counter generates synchronously one particular Walsh function in the interval 1 of normalized time during one cycle of counting. The usual design procedures for synchronous counters are not applicable because of the large number of logic variables. Using a two-dimensional plot of the enabling inputs, it turns out that the T flip-flop is the most suitable type. It is shown that by using the symmetry properties of the enabling input patterns for a generator consisting of n T flip-flops, only (log2 n)- 1 standard time sequences, from which the remaining could be derived, need be generated. These time sequences can be easily obtained by decoding the outputs of those flip-flops generating the subset of Rademacher functions. The procedure is illustrated by taking an example of the generation of the first 16 Walsh functions. View full abstract»

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  • Cable Shielding Performance and CW Response

    Publication Year: 1973 , Page(s): 180 - 187
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1458 KB)  

    We show that the reference for the measurement of the shielding performance of a cable sheath should be the sheath current. However, unless the phase length of the cable is short, the response at the ends of the line will be sensitive to frequency even if the sheath current is uniform, and the coaxial line formed by the core wires and the sheath is matched at both ends. This is because the driving field in the coaxial line and the waves that it generates have different phase speeds and directions. We present supporting experimental data. Because of this effect it is not meaningful simply to state that a cable provides a specifled attenuation, except for a cable that is short at the highest frequency of interest. We discuss the effects of connectors and of cracks or holes in the sheath. Because the total leakage is proportional to the sum of leakages through the sheath (the connectors and the cracks) and not to their product, it is necessary to assign these contributions with some arbitrariness in order to compare them in decibels. We give an example that shows the importance of RF-tight connectors. View full abstract»

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  • Surface Transfer Impedance Measurements on Subminiature Coaxial Cables

    Publication Year: 1973 , Page(s): 188 - 190
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (643 KB)  

    The surface transfer impedances (STI) of several flexible subminiature coaxial cables, such as RG-174/U and RG-188/U, plus smaller coaxial shielded wires, were measured to determine EM shielding characteristics. The results cover the frequency range 0.1-50 MHz and correlate well with previous theoretical models and with experimental values for larger cables, such as RG-58. Copperbraided subminiature cables had STI values 2-5 times larger than those for RG-58 View full abstract»

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  • Frequency Assignment Games and Strategies

    Publication Year: 1973 , Page(s): 191 - 196
    Cited by:  Papers (17)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1229 KB)  

    The way the spectrum is committed through the processes of allocation and assignment has a definite bearing on spectrum utilization. Both processes are stochastic in nature and nearly irreversible. Decisions are made with respect to each applicant as time progresses without knowing the requirements of future applicants, and it is difficult, if not impossible, to revoke or change an assignment once given. This paper examines the frequency assignment game to determine the effect of assignment strategy on spectrum utilization, and to define the principle underlying the development of optimum strategies. The results of this investigation show that there is an effect of strategy, that the effect bears on spectrum utilization, that there is an optimum strategy, and that there are some very useful near-optimum ones as well. Finally, there is evidence that we may not be doing things quite the right way, and some recommendations are offered. View full abstract»

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  • The 1973 CISPR Plenary Assembly at Monmouth College, New Jersey

    Publication Year: 1973 , Page(s): 197 - 199
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    First Page of the Article
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  • Comments on "RF Impedance of Power Lines and Line Impedance Stabilization Networks in Conducted Interference Measurements"

    Publication Year: 1973 , Page(s): 199
    Cited by:  Papers (3)
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  • Effect of Receiver Bandwidth on Waveforms and Time Characteristics of Atmospheric Radio Noise Bursts

    Publication Year: 1973 , Page(s): 199 - 200
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (521 KB)  

    Several investigators have presented the results of their experimental investigations and theoretical expectations on the effect of receiver bandwidth on the time characteristics and waveforms of atmospheric radio noise bursts. The experimental and theoretical findings do not appear to agree with each other. This communication offers a possible explanation for this "discrepancy" with support from experimental evidence, drawn from a large number of references included in this communication. View full abstract»

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  • Maximum Ez-Field of a Dipole and Monopole

    Publication Year: 1973 , Page(s): 200 - 201
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    For the two-set comprising a dipole and a monopole where the monopole is exactly half of the dipole, the monopole produces the same maximum Ez field as that produced by the empty space dipole, for one-half the input and radiated power. View full abstract»

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  • Test Fixtures for RF Susceptibility Testing

    Publication Year: 1973 , Page(s): 201
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    The most likely standard test fixture for RF susceptibility testing is the twin-strip transmission line, or its half-space counterpart. Its capacitance per meter (length) is 2¿ or 4¿; characteristic impedance Zc= Z0/2 or Z0/4; voltage gradient Ez = V/w or 2 V/w; magnetic field Hy = V/w Z0 or 2 V/w Z0, respectively. View full abstract»

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  • Correction to "Multiconductor Antenna Transmission Lines with Arbitrarily Positioned Load Impedances in an Incident Field"

    Publication Year: 1973 , Page(s): 202
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  • Correction to "The Use of the Lorentz Reciprocity Theorem to Prove Equality of the Open-Circuit Voltages of a Receiving Dipole and a Monopole"

    Publication Year: 1973 , Page(s): 202
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  • Contributors

    Publication Year: 1973 , Page(s): 203 - 204
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  • 1973 Technical Reviewers

    Publication Year: 1973 , Page(s): 205 - 206
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  • Announcement Compilation of a Directory of EMC Computer Programs

    Publication Year: 1973 , Page(s): 206
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  • 1973 Index IEEE Transactions on Electromagnetic Compatibility Vol. EMC-15

    Publication Year: 1973 , Page(s): 206a - 206d
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  • IEEE Standard Dictionary of Electrical and Electronics Terms [advertisement]

    Publication Year: 1973 , Page(s): 206-e
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  • Membership Application Electromagnetic Compatibility Group

    Publication Year: 1973 , Page(s): 206-f
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  • G-EMC Policy

    Publication Year: 1973 , Page(s): 206-g
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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