Wave Propagation in a Vegetated Residential Area Using the Distorted Born Approximation and the Fresnel-Kirchhoff Approximation
Konferenz: EuCAP 2009 - 3rd European Conference on Antennas and Propagation
23.03.2009 - 27.03.2009 in Berlin, Germany
Tagungsband: EuCAP 2009
Seiten: 4Sprache: EnglischTyp: PDFPersönliche VDE-Mitglieder erhalten auf diesen Artikel 10% Rabatt
Torrico, Saúl A. (Comsearch, 19700 Janelia Farm Boulevard, Ashburn, Virginia 20147 USA)
Lang, Roger H. (Department of Electrical and Computer Engineering, The George Washington University, Washington, DC 20052, USA)
A theoretical model is proposed to include the incoherent fields along with the coherent fields to compute the excess loss in a vegetated residential environment, with particular application to mobile radio systems. Physical optics is used to evaluate the diffracting fields at the receiver level by using multiple Kirchhoff-Huygens integration for each half-screen combination. The fields at the aperture of each half-screen depend on the mean field passing through a tree and the incoherent fields produced by the tree canopy. The mean field in the tree canopy is found by using the multiple scattering theory of Foldy-Lax. The incoherent field produced by the tree canopy is found by using the distorted Born approximation.