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International Journal of Antennas and Propagation
Volume 2013 (2013), Article ID 348123, 23 pages
http://dx.doi.org/10.1155/2013/348123
Review Article

Mutual Coupling in Phased Arrays: A Review

Centre of Electromagnetics, CSIR-National Aerospace Laboratories, Bangalore 560 017, India

Received 18 February 2013; Accepted 20 March 2013

Academic Editor: Ahmed A. Kishk

Copyright © 2013 Hema Singh 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

The mutual coupling between antenna elements affects the antenna parameters like terminal impedances, reflection coefficients and hence the antenna array performance in terms of radiation characteristics, output signal-to-interference noise ratio (SINR), and radar cross section (RCS). This coupling effect is also known to directly or indirectly influence the steady state and transient response, the resolution capability, interference rejection, and direction-of-arrival (DOA) estimation competence of the array. Researchers have proposed several techniques and designs for optimal performance of phased array in a given signal environment, counteracting the coupling effect. This paper presents a comprehensive review of the methods that model and mitigate the mutual coupling effect for different types of arrays. The parameters that get affected due to the presence of coupling thereby degrading the array performance are discussed. The techniques for optimization of the antenna characteristics in the presence of coupling are also included.