Table of Contents
International Journal of Microwave Science and Technology
Volume 2009 (2009), Article ID 681252, 7 pages
http://dx.doi.org/10.1155/2009/681252
Review Article

W-Band Characterization of Grounded Frequency Selective Surface Arrays Composed of Nonequal Slot Length Subarrays

1Laboratory for Micro- and Photonelectronics, Department of Electronics and Informatics, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
2Department INTEGSYS, IMEC, Kapeldreef 75, 3001 Heverlee, Belgium

Received 18 March 2009; Revised 20 November 2009; Accepted 23 December 2009

Academic Editor: Jan-Erik Mueller

Copyright © 2009 S. Islam et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We present the design and construction of Frequency Selective Surface arrays composed of two subarrays of different slot lengths. We investigated their response variations with the variation of slot length differences of the elementary sub-arrays. Such nonhomogeneous arrays cannot be simulated with Computer Aided Design (CAD) programs because the boundary conditions are not fulfilled by the simulator. In infinite array simulation, the periodic boundary conditions are prescribed on the walls of the unit cell, whereas in the case of sub-arrays of unequal slot length such boundary conditions are not applicable. The CAD simulation of such combined array gives incorrect values of amplitude and phase responses. In this work, we investigate the characteristics of such complex arrays by using heuristic experimental approach. The results of the experimental approach demonstrate that the resultant reflection amplitude and phase of such complex array depend on the difference of slot lengths of the two sub-arrays.