3D Band-Absorptive Frequency Selective Rasorber: Concept and Analysis

被引:26
作者
Yu, Yufeng [1 ]
Luo, Guo Qing [1 ]
Liu, Qi [2 ]
Yu, Weiliang [1 ]
Jin, Huayan [1 ]
Liao, Zhen [1 ]
Shen, Zhongxiang [3 ]
机构
[1] Hangzhou Dianzi Univ, Inst Antennas & Microwave Technol, Minist Educ, Key Lab RF Circuits & Syst, Hangzhou 310018, Zhejiang, Peoples R China
[2] Hangzhou Dianzi Univ, Smart City Res Ctr Zhejiang Prov, Hangzhou 310018, Zhejiang, Peoples R China
[3] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore
基金
中国国家自然科学基金;
关键词
Frequency selective rasorber (FSR); absorptive frequency selective structure; band-absorptive; SQUARE-LOOP; DESIGN; FSS;
D O I
10.1109/ACCESS.2018.2886967
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
This paper presents a 3D band-absorptive frequency selective rasorber (FSR). Such an FSR is absorptive within a specific band and almost transparent below the absorption band. The definition and evaluation of the band-absorptive FSR is initially provided and followed by the design concept of 3D FSR. An example is then proposed, whose unit cell is composed of 3D absorber and 3D band-stop FSS. An equivalent circuit model is established for understanding its operating principle. A prototype of the proposed 3D band-absorptive FSR is fabricated. The measured results show that it has an absorption band (vertical bar S-11 vertical bar <= -10 dB and vertical bar S-21 vertical bar <= -10 dB) from 4.21 to 6.51 GHz, with a thickness of 0.17 wavelength at 4.21 GHz. Moreover, vertical bar S-21 vertical bar is higher than -1 dB at the frequencies below 1.28 GHz. The proposed band absorptive FSR can be used as radomes for low-frequency antennas in military communications or spectrum monitoring systems.
引用
收藏
页码:2520 / 2528
页数:9
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