Time domain analysis of thin-wire antennas over lossy ground using the reflection-coefficient approximation

Time domain analysis of thin-wire antennas over lossy ground using the reflection-coefficient approximation

Fernández Pantoja, M.
Yarovoy, A.G.
Rubio Bretones, A.
González García, S.

Electrical Engineering, Mathematics and Computer Science

Telecommunications

2009-12-23

This paper presents a procedure to extend the methods of moments in time domain for the transient analysis of thin-wire antennas to include those cases where the antennas are located over a lossy half-space. This extended technique is based on the reflection coefficient (RC) approach, which approximates the fields incident on the ground interface as plane waves and calculates the time domain RC using the inverse Fourier transform of Fresnel equations. The implementation presented in this paper uses general expressions for the RC which extend its range of applicability to lossy grounds, and is proven to be accurate and fast for antennas located not too near to the ground. The resulting general purpose procedure, able to treat arbitrarily oriented thin-wire antennas, is appropriate for all kind of half-spaces, including lossy cases, and it has turned out to be as computationally fast solving the problem of an arbitrary ground as dealing with a perfect electric conductor ground plane. Results show a numerical validation of the method for different half-spaces, paying special attention to the influence of the antenna to ground distance in the accuracy of the results.

thin-wire antennas
time domain methods
method of moments

http://resolver.tudelft.nl/uuid:e582bc51-9861-40a0-b3c8-843c2a8be2b4

https://doi.org/10.1029/2009RS004152

American Geophysical Union

0048-6604

http://europa.agu.org/?view=article&uri=/journals/rs/rs0906/2009RS004152/2009RS004152.xml

Radio Science, 44, 2009

Institutional Repository

journal article

(c) 2009 The Author(s); American Geophysical Union