AUTHOR=Zhou Hongkun , Wang Yuchao , Liu Chengguo , Zhang Cheng 

TITLE=A Broadband Low-RCS Circularly Polarized Meta-Antenna

JOURNAL=Frontiers in Physics

VOLUME=Volume 10 - 2022

YEAR=2022

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2022.857960

DOI=10.3389/fphy.2022.857960

ISSN=2296-424X

ABSTRACT=A low-profile circularly polarized (CP) meta-antenna with broadband low-RCS feature is proposed in this paper. Our design is the combination of a CP antenna with a chessboard polarization conversion metasurface (CPCM) for balancing the radiation property and stealth feature. To relieve the adverse effect of the CPCM on the entire radiation performance, several redundant meta-atoms with the opposite phase state are removed to enhance the realized gain during the operation bandwidth (8.0 GHz to 9.0 GHz). The proposed meta-antenna shows excellent radiation performance: −10 dB impedance relative bandwidth is 26.48% (6.78-8.85 GHz), and 3-dB axial ratio relative bandwidth is 22.03% (7.27-9.07 GHz). In addition, RCS reduction over 5 dB is achieved via our design from 8.5 GHz to 21.5 GHz (86.67%) with the help of the deliberately designed CPCM. The final measured results demonstrate great consistent with the simulated ones.