Title :
A geometrical optics model for skywave radiation from antennas in irregular terrain
Author_Institution :
Lawrence Livermore Nat. Lab., CA, USA
Abstract :
A GO (geometrical optics) model for scattering by irregular terrain is described. GO is limited to propagation paths that do not graze the terrain surface since diffraction or surface waves are neglected: however, it represents a relatively simple approach and can be applied to three-dimensional terrain models. The GO model was tested for scattering from a two-dimensional Gaussian ridge to compare with results published by L.A. Berry (1967), who solved a Volterra integral equation for the field over the surface and then integrated to get the field above the ridge.<>
Keywords :
antennas; geometrical optics; ionospheric electromagnetic wave propagation; radiowave propagation; EM wave scattering; HF communication link; Volterra integral equation; antennas; field; geometrical optics model; irregular terrain; propagation paths; radiowave propagation; skywave radiation; three-dimensional terrain models; two-dimensional Gaussian ridge; Antennas and propagation; Geometrical optics; Integral equations; Optical diffraction; Optical propagation; Optical scattering; Optical surface waves; Solid modeling; Surface waves; Testing;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1991. AP-S. Digest
Conference_Location :
London, Ontario, Canada
Print_ISBN :
0-7803-0144-7
DOI :
10.1109/APS.1991.175109
