Please use this identifier to cite or link to this item:
Title: Dominant lateral waves in the canopy layer of a four-layered forest
Authors: Koh, J.H.
Li, L.W. 
Kooi, P.S. 
Yeo, T.S. 
Leong, M.S. 
Issue Date: May-1999
Citation: Koh, J.H., Li, L.W., Kooi, P.S., Yeo, T.S., Leong, M.S. (1999-05). Dominant lateral waves in the canopy layer of a four-layered forest. Radio Science 34 (3) : 681-691. ScholarBank@NUS Repository.
Abstract: In this paper a forest model of four-layered geometry is utilized for the theoretical analysis of radio wave propagation characteristics in the forest environment. Differing from those reported in previous publications, the current paper considers a receiving antenna that is located in the forest canopy layer instead of the trunk layer, and hence the results presented are not available elsewhere. Dyadic Green's functions in their eigenfunction expansion forms for the four-layered geometry are used at first to obtain an exact integral representation of the radiated electric field in the canopy layer. The radiated electric field components due to an arbitrarily oriented, small dipole in the trunk layer are then evaluated using the saddle point technique and the branch cut integrations, leading to closed-form expressions for the field. The total field is found to consist of the direct, the reflected, and the lateral waves. Although both the lateral waves propagating along the air-canopy and the trunk-ground interfaces play an important role in the propagation mechanism, only the lateral wave along the air-canopy upper interface dominates the total field in the far zone. Path loss of the radio waves in the forest is computed numerically for both the vertically and the horizontally oriented dipoles.
Source Title: Radio Science
ISSN: 00486604
DOI: 10.1029/1999RS900007
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Dec 1, 2022


checked on Oct 1, 2021

Page view(s)

checked on Nov 24, 2022

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.