Broadband polarization insensitive wide angular stable dual‐split square ring circuit analog absorber for radar cross section and electromagnetic interference shielding applications

Mohammad Abdul Shukoor; Sukomal Dey; Shiban K. Koul

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Broadband polarization insensitive wide angular stable dual‐split square ring circuit analog absorber for radar cross section and electromagnetic interference shielding applications

机译：Broadband polarization insensitive wide angular stable dual‐split square ring circuit analog absorber for radar cross section and electromagnetic interference shielding applications

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摘要

This work presents a simple broadband polarization‐insensitive circuit analog absorber (CAA) with wide angular stability. It comprises of dual‐cut square loop resonator loaded with eight lumped resistors as top patch and an inductive grid. The normal incidence reveals a 90% absorption bandwidth of 20.51 GHz (110% fractional bandwidth) covering the entire X to K‐band with a minimum flat absorption rate of 92.82%. Equivalent circuit analysis is carried out, and responses are validated with full‐wave simulations. The proposed prototype is insensitive to different polarization angles under normal incidence and stable with 45° in transverse electric (TE) and transverse magnetic (TM) incidences. The design's novelty lies in using two resistors on each side of the square ring, which improves the absorptivity performance. The inductive grid enhances TM mode's angular stability. The proposed absorber is fabricated, and the measured results are in good agreement. In‐band bistatic radar cross section reduction of 12.97 dBsm is obtained with the absorber using an X‐band antenna. The temperature profile of the prototype is illustrated using near‐in‐lock infrared thermography, and 2.1°F of temperature rise is noticed in the absorption band. The proposed structure possesses a low profile, broad bandwidth, polarization insensitivity, and wide angular stability to the best of the author's knowledge.

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来源
《International journal of RF and microwave computer-aided engineering》 |2022年第5期|23085-n/a|共15页
作者
Mohammad Abdul Shukoor; Sukomal Dey; Shiban K. Koul;
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作者单位

Indian Institute of Technology Palakkad;

Indian Institute of Technology Delhi;

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原文格式 PDF
正文语种英语
中图分类微波电子管;计算技术、计算机技术;
关键词
absorber; broadband; IR imaging; lumped resistor; radar cross section;

Broadband polarization insensitive wide angular stable dual‐split square ring circuit analog absorber for radar cross section and electromagnetic interference shielding applications

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