Volume 64, Issue 11 pp. 1911-1916
RESEARCH ARTICLE

An ultra-wide passband frequency-selective rasorber with high transmission

Kun Liao

Kun Liao

College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China

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Shaobin Liu

Corresponding Author

Shaobin Liu

College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China

Correspondence Shaobin Liu, College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.

Email: [email protected]

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Xinyuan Zheng

Xinyuan Zheng

College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China

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Xuewei Zhang

Xuewei Zhang

College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China

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Xianxian Shao

Xianxian Shao

Pingxiang Health Vocational College, Pingxiang, China

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Xiangkun Kong

Xiangkun Kong

College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China

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First published: 27 July 2022

Abstract

 A frequency-selective rasorber (FSR) with an ultra-wide transmission band and low-insertion loss based on compound spiral resonator is presented. The structure consists of the top lossy layer and bottom lossless layer. The frequency-selective surface is adopted as the lossless layer to obtain an ultra-wide transmission window. The top lossy layer is made up of the compound spiral resonator and I-shaped metallic strips with four lumped resistors in this design. The equivalent circuit model is constructed to expound the operating mechanism of this FSR. The 1 dB transmission bandwidth is achieved from 6.98 to 12.21 GHz (54.5%) with the minimum insertion loss of 0.13 dB at 10.40 GHz. Moreover, the bandwidth of S11 < −10 dB is obtained in 4.64–12.21 GHz with a fractional bandwidth of 89.8%. Furthermore, the designed FSR has a good oblique incident angle of 30° and polarization stability. Finally, the simulation results are proved by the experimental results, which confirm the feasibility of the design.

DATA AVAILABILITY STATEMENT

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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