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Simulation of HF propagation through a grid of conducting rods with application to forest modeling

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2 Author(s)
Buhl, D.P. ; Appl. Res. Labs., Univ. of Texas at Austin, Austin, TX, USA ; Rogers, R.L.

Designing HF communication systems to work in forested environments motivates a desire to understand the forest as a medium for radio wave propagation. At HF frequencies the forest is highly anisotropic because the most significant scatterers are vertical tree trunks. So, a reasonable first-order model of the forest is a grid of vertical scatterers. Using the Numerical Electromagnetic Code (NEC), a moment-method-based program, a grid of long vertical wires was simulated. Antennas inserted in the grid allow a relative permittivity of the grid as a composite medium to be determined. The length and distribution of the rods and the presence of a realistic ground plane are shown to influence dispersion in the simulated grid.

Published in:

Antennas and Propagation Society International Symposium, 2009. APSURSI '09. IEEE

Date of Conference:

1-5 June 2009

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