"JOURNAL OF RADIO ELECTRONICS"  N 4, 2015

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NUMERICAL MODELLING AND OPTIMIZATION OF THE ABSORBING PROPERTIES OF SOME RADIO ABSORBING MATERIALS

 

A. V. Nikitenko 1,2, A. S. Zubov 2, A. N. Bogolyubov 1

1 Lomonosov Moscow State University, faculty of physics, Moscow

2 Institute of Theoretical and Applied Electrodynamics of RAS

 

The paper is received on April 20, 2015

 

Abstract.    Numerical modeling of radio-absorbing materials commonly used in anechoic chambers is presented in this work. The method of optimization of radio-absorbing properties of such materials in case of normal incidence is suggested. Better properties are obtained by lowering reflection levels of diffraction orders. The main idea of optimization is to coat material with one or more matching layers. Pyramidal and wedge shaped materials are considered. RCWA-algorithm based program was used for numerical experiments. The relation between layer width and best-matching frequency is experimentally obtained. Materials with double coating are also considered. Reflection characteristics in relation to frequency are presented.

Key words: RCWA, radio-absorbing materials, anechoic chamber.