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Dual-Band Composite Wideband Absorbing Material for Broadband Antenna in-Band Radar Cross Section Reduction

By Mao Long, Wen Jiang, and Shu-Xi Gong
Progress In Electromagnetics Research M, Vol. 56, 71-79, 2017


A composite wideband absorbing material (WAM) covering dual bands is designed, to reduce the in-band radar cross section (RCS) for broadband antenna in this paper. The upper layer is a traditional absorber while the lower one is a dual-band frequency selective surface (FSS), which is formed by a square ring and an improved Jerusalem cross structure. The absorbing band has been broadened to 112% compared with the magnetic sheet without FSS. Over C and X bands, the absorption rate is over 90%. By using the FSS-based WAM as the ground plane of a Vivaldi antenna, substantial RCS reduction is obtained from 2-18 GHz. Moreover, the RCS is reduced remarkably over -80°-80° incident angles except for minority angles, with the radiation performance preserved at the same time. The experimental results are in good agreement with the simulated ones.


Mao Long, Wen Jiang, and Shu-Xi Gong, "Dual-Band Composite Wideband Absorbing Material for Broadband Antenna in-Band Radar Cross Section Reduction," Progress In Electromagnetics Research M, Vol. 56, 71-79, 2017.


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