Low-frequency reflectivity approximation for two- and three-dimensional EM absorbers
| Autor: | F. Olyslager, D. De Zutter, B. Baekelandt |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Physics
Approximation theory Anechoic chamber Wave propagation business.industry Electromagnetic compatibility Boundary (topology) Low frequency Condensed Matter Physics Integral equation Atomic and Molecular Physics and Optics Optics Electrical and Electronic Engineering business Electromagnetic absorbers |
| Zdroj: | IEEE Transactions on Electromagnetic Compatibility. 41:354-360 |
| ISSN: | 0018-9375 |
| DOI: | 10.1109/15.809815 |
| Popis: | Large-size electromagnetic absorbers are mainly used in anechoic and semi-anechoic chambers for electromagnetic compatibility testing. Therefore, the determination of the reflectivities in the low-frequency range (30-300 MHz) are of paramount importance in the performance evaluation of the absorber and, finally, in a "dark room" design. We here present a low-frequency approximation of the reflectivity based on a boundary and surface integral equation technique. This approach makes it possible to compare the approximation to the rigorous integral equation approach and to other approximations in the literature. The validity of the new low-frequency approximation is discussed based on reflectivity calculations of representative two- (2-D) and three-dimensional (3-D) absorber structures. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|