Broadband-Transmissive, Frequency-Selective Rasorber Design Using Characteristic Mode Analysis

This article designs a frequency-selective rasorber (FSR) with a broadband transmission window. It is synthesized by a broadband absorber and a frequency-selective surface (FSS). The resistive layer achieves broadband absorption by introducing a tortuous Jerusalem cross load with lumped resistors, a...

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Bibliographic Details
Published inElectronics (Basel) Vol. 11; no. 9; p. 1418
Main Authors Xiong, Jie, Yang, Baoping, Wu, Yanjie, Zeng, Xiongwei, Li, Qiuyu, Tang, Rongxin, Lin, Hai
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.05.2022
Subjects
Absorption spectra
Antennas
Bandwidths
Broadband
Current distribution
Design
Eigenvalues
Electric fields
Frequency selective surfaces
Optimization
Radar cross sections
Radiation
Resistors
Stealth technology
Jerusalem Israel
Israel
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Summary:This article designs a frequency-selective rasorber (FSR) with a broadband transmission window. It is synthesized by a broadband absorber and a frequency-selective surface (FSS). The resistive layer achieves broadband absorption by introducing a tortuous Jerusalem cross load with lumped resistors, and the lossless FSS adopts a three-layer metal structure to realize the broadband transmission window. The absorption mechanism of the resistive layer is analyzed using the theory of characteristic mode. The position of the resistor is determined according to the analysis of mode current distribution and parameter optimization. Prototypes of the structure were fabricated and measured, and the simulation results show that the 1 dB transmission window and the absorption band with |S11|< −1 dB are 36.4% and 97%, respectively. Therefore, the designed FSR has potential application prospects in electromagnetic stealth technology and radar cross-section reduction.
ISSN:2079-9292
2079-9292
DOI:10.3390/electronics11091418