A Low-RCS, High-Gain and Polarization-Insensitive FP Antenna Combing Frequency Selective Rasorber and Metasurface

A novel method to engineer high-gain and polarization-insensitive Fabry-Perot (FP) antenna with low scattering is presented by combining a polarization-insensitive broadband frequency selective rasorber with partially reflective surface (FSRP) and a reflective metasurface. The FSRP element consists...

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Bibliographic Details
Published in:IEEE Open Journal of Antennas and Propagation 2024-12, Vol.5 (6), p.1623-1628
Main Authors: Wang, Shaojie, Xu, He-Xiu, Wang, Mingzhao, Tang, Shiwei
Format: Article
Language:English
Subjects:
Absorption
Antenna measurements
Antennas
FP antenna
frequency selective rasorber
high-gain
Indium tin oxide
Metasurfaces
Radar cross section
Reflection
Reflector antennas
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Summary:A novel method to engineer high-gain and polarization-insensitive Fabry-Perot (FP) antenna with low scattering is presented by combining a polarization-insensitive broadband frequency selective rasorber with partially reflective surface (FSRP) and a reflective metasurface. The FSRP element consists of an upper indium tin oxide layer printed on polyethylene glycol terephthalate substrate, a metallic loop, and a metallic patch in the middle and bottom layer, respectively, which is designed to absorb most of out-of-band incidence while achieving in-band reflection. The bottom metallic patch is a partially reflected surface which is utilized to construct an FP resonant cavity with the reflective metasurface to ensure in-band radiation. The excellent performance of proposed FP antenna is demonstrated by simulations and measurements, revealing that the antenna exhibits an in-band peak measured gain of 21.8 dBiC at 12 GHz. Besides, a significant out-of-band scattering reduction is achieved within 9.9-11.3 GHz and 13.3-20 GHz under normal detection. Our paradigm setups a new avenue for low radar cross section of a high-gain antenna, promising great potential in practical applications.
ISSN:2637-6431
2637-6431
DOI:10.1109/OJAP.2024.3426624