51. A periodic moment method solution for TM scattering from lossy dielectric bodies with application to wedge absorber
- Author
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Chang-Fa Yang, Walter D. Burnside, and R. Rudduck
- Subjects
Physics ,Optics ,Anechoic chamber ,Scattering ,business.industry ,Reflection (physics) ,Plane wave ,Transverse wave ,Dielectric ,Electrical and Electronic Engineering ,Method of moments (statistics) ,business ,Wedge (geometry) - Abstract
The periodic moment method (PMM) solution for the scattering from two-dimensional lossy dielectric bodies is developed. The purpose is to design a microwave wedge absorber for low reflectivity so that one can improve the performance of anechoic chamber measurements. With PMM, the reflection and transmission coefficients of periodically distributed bodies illuminated by a plane wave have been accurately calculated using a Cray Y-MP supercomputer. Through these studies, some wedge absorber configurations have been designed, fabricated, and then tested in the OSU/ESL compact range measurement facility. Two 8-in commercial wedges, a curved wedge, and a four-layer wedge, were studied. In all cases, good agreement between calculations and measurements was obtained. >
- Published
- 1992
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