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Title: Hybrid frequency-selective rasorber with low-frequency diffusion and high-frequency absorption
Authors: Zhou, Lin
Shen, Zhongxiang
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2020
Source: Zhou, L. & Shen, Z. (2020). Hybrid frequency-selective rasorber with low-frequency diffusion and high-frequency absorption. IEEE Transactions On Antennas and Propagation, 69(3), 1469-1476.
Journal: IEEE Transactions on Antennas and Propagation
Abstract: In this article, a novel frequency-selective rasorber (FSR) is proposed, which provides a high-efficiency transmission band and a broadband radar cross section (RCS) reduction by hybridizing low-frequency diffusion and high-frequency absorption. The FSR comprises three layers. A broadband second-order bandpass frequency-selective surface is designed as the bottom layer, which has a reflection-transmission-reflection frequency response, and acts as an equivalent ground plane for the upper layers outside the transmission band. A circuit analog absorber and a coding metasurface are designed as the middle and top layers, respectively. They use absorption and diffusion to reduce the RCS at high- and low-frequency bands. In the coding metasurface, miniaturized and absorptive techniques are utilized to suppress the harmonic resonances. The whole FSR unit cell exhibits a cross-polarized reflection-transmission-absorption frequency response. A co-polarized transmission magnitude larger than -1.5 dB from 7.4 to 12.1 GHz and a co-polarized reflection magnitude less than -10 dB from 3.1 to 20 GHz are observed in the full-wave simulation under the normal incidence. An FSR sample with 20×20 unit cells is designed and measured for verification. The measurement agrees well with the simulation, and it shows a significant monostatic RCS reduction from 3.3 to 20 GHz in comparison with a metallic plane of the same size.
ISSN: 0018-926X
DOI: 10.1109/TAP.2020.3018537
Schools: School of Electrical and Electronic Engineering 
Rights: © 2020 IEEE. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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