Ultrawideband Dual-Polarized Frequency-Selective Absorber With Tunable Reflective Notch

被引：32

作者：

Fan, Yudi ^{[1
]}

Li, Da ^{[1
]}

Ma, Hanzhi ^{[1
]}

Xing, Jiaqi ^{[1
]}

Gu, Yijie ^{[1
]}

Ang, Lay Kee ^{[2
]}

Li, Er-Ping ^{[1
]}

机构：

[1] Zhejiang Univ, ZJU UIUC Inst, Key Lab Adv Micronano Elect Devices & Smart Syst &, Hangzhou 310027, Peoples R China

[2] Singapore Univ Technol & Design, Sci & Math Pillar, Singapore 487372, Singapore

来源：

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2023年 / 71卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Dual-polarized; equivalent circuit model (ECM); frequency-selective absorber (FSA); frequency-selective surface (FSS); tunable notch; RASORBER; SURFACE; DESIGN;

D O I：

10.1109/TAP.2023.3239161

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

An ultrawideband dual-polarized frequency-selective absorber (FSA) with a tunable reflective notch is proposed in this communication. The structure is constructed by combining a broadband FSA as well as a tunable lossless frequency-selective surface (FSS). The FSA consists of a lossy layer and an air spacer, which is backed with a metal plane. Varactors are employed in the lossless FSS and a dc bias is applied to adjust the frequency of the reflective notch. An equivalent circuit model (ECM) of the notch-tunable FSA is established to explain the operating principle, and the impedance condition of the ultrawide absorptive band is discussed. The ECM results agree well with the frequency-domain simulation results. The absorption band with a reflection coefficient below -10 dB extends from 2 to 8 GHz. It is worth mentioning that the reflective notch with nearly perfect reflection is demonstrated to be tuned from 2.24 to 4.56 GHz. A prototype of the structure is fabricated and measured to validate the design concept. Its measured absorption band from 2.5 to 8 GHz is in favorable agreement with the simulated results. These findings will be useful for designing intelligent antenna reflector systems with out-of-band radar cross section (RCS) reduction.

引用

页码：2855 / 2860

页数：6

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