Title :
A periodic moment method solution for TM scattering from lossy dielectric bodies with application to wedge absorber
Author :
Yang, Chang-Fa ; Burnside, Walter D. ; Rudduck, Roger C.
Author_Institution :
Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA
fDate :
6/1/1992 12:00:00 AM
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
Keywords :
electromagnetic wave scattering; numerical methods; 2-D problems; Cray Y-MP supercomputer; OSU/ESL compact range; PMM; TM scattering; anechoic chamber measurements; curved wedge; electromagnetic scattering; four-layer wedge; lossy dielectric bodies; microwave wedge absorber; periodic moment method solution; periodically distributed bodies; plane wave illumination; reflection coefficients; transmission coefficients; Anechoic chambers; Dielectric losses; Dielectric measurements; Microwave measurements; Moment methods; Reflection; Reflectivity; Scattering; Supercomputers; Testing;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
