A determination of transient antenna impedance via a numerical solution of the electric-field integral equation
作者:
S.M. Booker,
A.P. Lambert,
P.D. Smith,
期刊:
Journal of Electromagnetic Waves and Applications
(Taylor Available online 1994)
卷期:
Volume 8,
issue 12
页码: 1669-1693
ISSN:0920-5071
年代: 1994
DOI:10.1163/156939394X00452
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
A numerical method for determining the broadband characteristic impedance of an antenna is described. The method is based on a solution of the electric field integral equation for the antenna surface subject to a strongly localized incident field, representative of a desired transient source voltage. A method is outlined for calculating, from the numerically simulated feed current, the frequency-dependent impedance spectrum of a finite antenna, subject to a sharp pulse. It is shown that this may be used to determine reliably the characteristic impedance of TEM antennas. Particular attention is paid to the problem of effectively modeling the feed region of the transient antenna. A general approach which ensures the stability and accuracy (to within a few percent) of solutions is described. It uses surface patches to model the antenna and obviates potential difficulties associated with thin wire models of the feed region.
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