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.