Title :
Effect of canopy-air interface roughness on HF-VHF wave propagation in forest
Author :
Sarabandi, K. ; Il-Suek Koh
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA
Abstract :
The problem of wave propagation in forest is revisited in particular, the effect of the non-planar interface between the air and the canopy on lateral waves is examined. An analytical formulation is obtained for the mean field when both the transmitter and receiver are within the foliage. This formulation is based on the distorted Born approximation and is shown that compared to a planar interface, the field of a dipole in a canopy with rough interface is significantly reduced.
Keywords :
HF radio propagation; VHF radio propagation; approximation theory; dipole antennas; interface roughness; HF-VHF wave propagation; analytical formulation; canopy-air interface roughness; dipole field; distorted Born approximation; foliage; forest; lateral waves; mean field; nonplanar interface; planar interface; receiver; transmitter; Approximation methods; Dielectrics; Fresnel reflection; Geometry; Hafnium; Integral equations; Laboratories; Polarization; Scattering; Transmitters;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1999. IEEE
Conference_Location :
Orlando, FL, USA
Print_ISBN :
0-7803-5639-x
DOI :
10.1109/APS.1999.788223
