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Proceedings Paper

Wave propagation through complex wall structures
Author(s): Blake Anderton; Ryan White; Eric Williams; Jonathan Hess; Steve Manson; Glafkos Stratis
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Paper Abstract

Analytical expressions for Fresnel reflection and transmission coefficients have been extensively used in ray-tracing simulation. Although these tools accurately predict the field for simple homogeneous wall structures, it is difficult, if not impossible, to extend such an analysis to find reflection and transmission coefficients for walls composed of dielectric and imperfectly conducting materials or complex, inhomogeneous structures. In principle, Fresnel theory is considered a high-frequency method, but in practical problems (such as walls with metallic rebars and similar applications), transmission does not monotonically decrease with incidence angle, and Fresnel theory does not apply. In this paper, we use the FDTD method to extend the theoretical Fresnel formulation to certain types of problems where Fresnel theory does not apply. We find that the presence of rebar affects transmission characteristics much more significantly than permittivity or wall depth. We initially verify the FDTD method with simple theoretical applications, and then we go further in more complicated cases; we furthermore extend our analysis to polarization effects that occur from such inhomogeneities.

Paper Details

Date Published: 21 June 2011
PDF: 11 pages
Proc. SPIE 8021, Radar Sensor Technology XV, 80210M (21 June 2011); doi: 10.1117/12.885146
Show Author Affiliations
Blake Anderton, Raytheon Missile Systems (United States)
Ryan White, Raytheon Missile Systems (United States)
Eric Williams, Raytheon Missile Systems (United States)
Jonathan Hess, Raytheon Missile Systems (United States)
Steve Manson, Raytheon Missile Systems (United States)
Glafkos Stratis, Raytheon Missile Systems (United States)

Published in SPIE Proceedings Vol. 8021:
Radar Sensor Technology XV
Kenneth I. Ranney; Armin W. Doerry, Editor(s)

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