NDLI: Electromagnetic Resonances of a Straight Wire on an Earth-Air Interface

Content Provider	IEEE Xplore Digital Library
Author	Myers, J.M. Sandler, S.S. Tai Tsun Wu
Copyright Year	1963
Abstract	Using a variational method, we recently determined an electromagnetic “signature” for characterizing a straight wire in free space. The signature consists of the first five resonant frequencies and their widths, more compactly expressed as the first five complex-valued resonant frequencies. Here we apply the variational method to the much more complicated case of determining the same signature for a straight wire or wire pair on a flat interface between a homogeneous earth and air. To calculate the resonances we obtain an integral equation for the current on a wire on the interface between two dielectric media. Complex-valued resonant frequencies are defined as those for which the homogeneous integral equation for the current in an equivalent thin strip on the interface has non-zero solutions. The variational method extracts good approximations to these complex-valued resonant frequencies, without having to solve the integral equation. A table of resonances is given for the case of a relative dielectric constant of the earth equal to 4 and for three values of the ratio of wire radius to wire half-length.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	3154
Ending Page	3163
Page Count	10
File Size	546068
File Format	PDF
ISSN	0018926X
Volume Number	59
Issue Number	9
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wires Approximation methods Integral equations Resonant frequency Strips Kernel Earth variational methods Antenna theory earth integral equation interface phenomena resonance
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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