Electromagnetic wave diffraction by array of complex-shaped metal elements placed on ferromagnetic substrate

¹ Head of Theoretical Radio Physics Department, Institute of Radio Astronomy of National Academy of Sciences of Ukraine, 4 Chervonopraporna St., Kharkiv, 61002, Ukraine
² Federal University of Para, P.O. Box 8619, Agencia UFPA, CEP 66075-900 Belem, PA, Brazil

Corresponding author: victor@ufpa.br

Received: 8 April 2009
Accepted: 8 December 2009
Published online: 3 February 2010

Abstract

Full wave numerical study of electromagnetic wave reflection from and transmission through an array of thin, perfect conducting, planar strip complex-shaped elements placed on a magnetized ferrite substrate is carried out. Our results show, that the absorption level and the frequency band of the structure, when the ferromagnetic resonance and a metal element resonance are close in frequency, are larger than the corresponding characteristics of the ferrite layer without metal elements. A significant enhancement of the Faraday rotation has frequency shift with respect to the main resonance. Both right-handed and left-handed circular polarized incident waves interact effectively with a metal array placed on ferrite substrate unlike the known resonant interaction when only one kind (right- or left-handed) of circular polarized waves interacts with the ferrite slab without metal elements.