Vol. 38

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2014-08-16

Simulations and Effects of Natural Environments on Low Frequency Antennas with Three-Dimensional FDTD Method

By Julien Vincent, Pierre Borderies, Jean-René Poirier, and Vincent Gobin
Progress In Electromagnetics Research M, Vol. 38, 45-52, 2014
doi:10.2528/PIERM14050701

Abstract

Three-dimensional Finite-Difference in Time-Domain method is applied to simulate Low Frequency antennas in the presence of natural environments. All antennas are made up of wires set down on a square shaped ground plane and their dimensions depend on the wavelength of the source. Both monopole and inverted L antennas are considered in this paper. The antenna systems are computed in the presence of two examples of natural elements: a large forest and then on the top of a hill. The main aim of this paper is to show the effects of these environments on the properties of the antennas and on the efficiency of the ground wave excitation. The outcome of these investigations shows a power ratio enhancement of several decibels when the two kinds of antenna described in this paper are located on the top of a hill. On the other hand, the effects of a large forest depend on the geometry of the antenna. It doesn't affect the radiation of a quarter-wave monopole antenna, on the contrary losses disrupt radiation when an inverted L antenna is built in the middle of a large forest.

Citation


Julien Vincent, Pierre Borderies, Jean-René Poirier, and Vincent Gobin, "Simulations and Effects of Natural Environments on Low Frequency Antennas with Three-Dimensional FDTD Method," Progress In Electromagnetics Research M, Vol. 38, 45-52, 2014.
doi:10.2528/PIERM14050701
http://test.jpier.org/PIERM/pier.php?paper=14050701

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