Table of Contents
International Journal of Microwave Science and Technology
Volume 2011, Article ID 368080, 6 pages
Research Article

Trapped-Mode Resonance Regime of Thin Microwave Electromagnetic Arrays with Two Concentric Rings in Unit Cell

Department of Electrical Engineering, Federal University of Para, 66075-900 Belem, PA, Brazil

Received 30 September 2010; Accepted 8 April 2011

Academic Editor: Ning Hua Zhu

Copyright © 2011 M. N. Kawakatsu and V. A. Dmitriev. 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.


We present a theoretical study of reflection and transmission characteristics of a microwave planar array on a thin dielectric substrate with unit cell made of two concentric rings. This array possesses high quality factor transmission resonance with polarization insensitivity for normally incident plane wave. This resonance is defined by the trapped-mode regime. We show that for oblique incidence, there are some differences in characteristics of the array and a small change in quality factor of the trapped-mode resonance.