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International Journal of Antennas and Propagation
Volume 2012 (2012), Article ID 491242, 7 pages
http://dx.doi.org/10.1155/2012/491242
Research Article

Efficient Evaluation of the External Mutual Coupling in Dielectric-Covered Waveguide Slot Arrays

1College of Electronics Science and Engineering, National University of Defense Technology, Changsha 410073, China
2Dipartimento di Ingegneria Elettrica ed Elettronica, Università di Cagliari, Piazza D'Armi, 09123 Cagliari, Italy

Received 16 January 2012; Revised 14 April 2012; Accepted 2 May 2012

Academic Editor: Tayeb A. Denidni

Copyright © 2012 Zusheng Jin 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

An accurate and efficient procedure is devised to evaluate the mutual coupling in dielectric-covered planar arrays of longitudinal slots. This approach takes full advantage of the discrete complex image method to cast the spatial-domain Green's functions into closed forms, and hence a direct calculation of mutual coupling in the spatial-domain is available. The computation time reduces significantly compared to the previous spectral-domain procedure, without any loss in the accuracy, rendering this approach very attractive for the design of large dielectric-covered planar arrays.