Pixelated bicontrollable metasurface absorber tunable in complete X band

Govindam Sharma, Pankaj Kumar, Akhlesh Lakhtakia and Pradip Kumar Jain

Journal of Electromagnetic Waves and Applications, 2022, vol. 36, issue 17, 2505-2518

Abstract: A pixelated bicontrollable metasurface tunable in the complete X band was designed with its meta-atoms comprising yttrium iron garnet (YIG)-patched pixels and conductive rubber (CR)-patched pixels on a metal-backed silicon substrate. Maximum absorptance of a normally incident plane wave greater than 0.99 is achievable and tunability with absorptance exceeding 0.9 is realizable, with the help of an external magnetostatic field and temperature. The YIG-patched pixels provide magnetostatic control modality with sensitivity of $ 0.04\,{\rm MHz}\,{\rm A}^{-1}\,{\rm m} $ 0.04MHzA−1m and the CR-patched pixels provide thermal control modality with sensitivity of $ 1\,{\rm MHz}\,{\rm K}^{-1} $ 1MHzK−1. The proposed metasurface absorber can be used to improve the performance of weather radar, police speed radar, and direct broadcast television.

Date: 2022
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DOI: 10.1080/09205071.2022.2092037

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