Low-Frequency Electromagnetic Backscattering from Tunnels.

Casey, K. ; Pao, H. Y.

Technical Information Center Oak Ridge Tennessee

关键词: Backscattering;    Tunnels;    Electromagnetic scattering;    Dielectrics;    Electromagnetic field;   

RP-ID  :  DE2007912936

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

Low-frequency electromagnetic scattering from one or more tunnels in a lossy dielectric half-space is considered. The tunnel radii are assumed small compared to the wavelength of the electromagnetic field in the surrounding medium; a tunnel can thus be modeled as a thin scatterer, described by an equivalent impedance per unit length. We examine the normalized backscattering width for cases in which the air-ground interface is either smooth or rough.