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International Journal of Antennas and Propagation
Volume 2017 (2017), Article ID 1260973, 11 pages
https://doi.org/10.1155/2017/1260973
Research Article

Wideband RCS Reduction of Microstrip Array Antenna Based on Absorptive Frequency Selective Surface and Microstrip Resonators

National Laboratory of Antennas and Microwave Technology, Xidian University, Xi’an, Shaanxi 710071, China

Correspondence should be addressed to Wen Jiang; moc.qq.piv@31wj

Received 21 January 2017; Revised 29 March 2017; Accepted 2 April 2017; Published 2 May 2017

Academic Editor: N. Nasimuddin

Copyright © 2017 Jingjing Xue 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 approach for wideband radar cross section (RCS) reduction of a microstrip array antenna is presented and discussed. The scheme is based on the microstrip resonators and absorptive frequency selective surface (AFSS) with a wideband absorptive property over the low band 1.9–7.5 GHz and a transmission characteristic at high frequency 11.05 GHz. The AFSS is designed to realize the out-of-band RCS reduction and preserve the radiation performance simultaneously, and it is placed above the antenna with the operating frequency of 11.05 GHz. Moreover, the microstrip resonators are loaded to obtain the in-band RCS reduction. As a result, a significant RCS reduction from 1.5 GHz to 13 GHz for both types of polarization has been accomplished. Compared with the reference antenna, the simulated results exhibit that the monostatic RCS of the proposed array antenna in - and -polarization can be reduced as much as 17.6 dB and 21.5 dB, respectively. And the measured results agree well with the simulated ones.