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Development and modeling of 2D periodic structures for narrowband filtering of signals

Keywords:

V.P. Meshchanov – Dr. Sc. (Eng.), Director of NIKA-Microwave, Ltd. E-mail: nika373@bk.ru
S.А. Alaverdyan – Ph.D. (Eng.), Head of Department, Central Institute of Measuring Equipment. E-mail: asinok@gmail.com
I.N. Kabanov – Ph.D. (Eng.), Head of Department, Mytishchinskiy Scientific-Research Institute of Radio Measuring Instruments. Е- mail: mr.kin63@mail.ru
V.V. Komarov – Dr. Sc. (Eng.), Professor, Saratov State Technical University named after Gagarin Yu.A. E mail: vyacheslav.komarov@gmail.com


Today two-dimensional periodic structures, called frequency-selective surfaces (FSS), find wide spread in different microwave and terahertz systems of electromagnetic signals parameters control. One of such structures, made by using the jet etching technology, which is the thin metallic screen with cross-shaped periodic holes, is considered in the present paper. The three-dimensional numerical model based on the finite-difference time-domain (FDTD) method allowing carrying out not only the analysis but the optimization of FSS parameters has been built to investigate its electrodynamic characteristics. Two most important parameters: transmission coefficient and band pass were calculated in W-range. Polynomial expressions for approximate estimation of the resonant wave lengths of the FSS under study have been obtained with the help of another model based on the finite element method (FEM). The influence of aperture elements sizes and electro-physical properties on FSS transmission characteristics is found. Obtained data have been utilized for development of ultra-narrowband filters with the central frequency of 90 GHz.
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