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International Journal of Antennas and Propagation
Volume 2013, Article ID 298538, 8 pages
http://dx.doi.org/10.1155/2013/298538
Research Article

Full-Wave Analysis of Microstrip Antennas in Three-Layered Spherical Media

Department of Radar Engineering, Hefei Electronic Engineering Institute, 460 Huangshan Road, Hefei, Anhui 230037, China

Received 31 December 2012; Revised 29 June 2013; Accepted 16 July 2013

Academic Editor: Mugen Peng

Copyright © 2013 Tao Yu and Chengyou Yin. 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

A model of three-layered spherical microstrip antenna has been analyzed based on Rao-Wilton-Glisson (RWG) triangular basis functions using mixed potential integral equation (MPIE). Firstly, the model of antenna and the dyadic Green’s function in spherical microstrip antennas are given at the beginning of this paper. Then, due to the infinite series convergence problem, asymptotic extraction approach is presented to accelerate the Green’s functions convergence speed when source and field points are located in the same layer and different layers. The convergence speed can be accelerated observably by using this method. Finally, in order to simplify impedance matrix elements calculation at the junction of the probe and patch, a novel division fashion of pair of triangles is adopted in this paper. The input impedance result obtained shows the validity and effectiveness of the analysis method comparing with published data.