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Title: Radio wave propagation along earth-space paths in the presence of a multilayered anisotropic forest
Authors: Li, L.-W. 
Lee, C.-K.
Yeo, T.-S. 
Leong, M.-S. 
Keywords: Anisotropic media
Closed form solution
Lateral waves
Wave propagation
Issue Date: Apr-2002
Citation: Li, L.-W., Lee, C.-K., Yeo, T.-S., Leong, M.-S. (2002-04). Radio wave propagation along earth-space paths in the presence of a multilayered anisotropic forest. Electromagnetics 22 (3) : 235-260. ScholarBank@NUS Repository.
Abstract: Propagation of electromagnetic waves along earth-space paths in forest environments is analyzed in this paper, where the transmitter is placed in the air region above the vegetation, while the receiver may be in the air region or within the vegetation. This propagation model considers the forest as a horizontally stratified, anisotropic medium of canopy and trunk, bounded by ground below and air above. Dyadic Green's functions in their eigenfunction expansion forms for planarly layered anisotropic media are applied to analyze this problem. The analytical close forms of these electric fields are then obtained by using the saddle point techniques and branch cut integrations in the complex plane and, hence, expressed in terms of direct wave, multiply reflected waves, and lateral waves. Propagation mechanisms of these waves are studied and radio losses in a typical forest are calculated numerically.
Source Title: Electromagnetics
ISSN: 02726343
DOI: 10.1080/02726340252886483
Appears in Collections:Staff Publications

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