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A low-profile wideband circularly polarized metasurface antenna based on characteristic mode analysis

Published online by Cambridge University Press:  07 December 2023

Kun Chai ,
Zhi Li ,
Yajuan Zhao ,
Liping Han Open the ORCID record for Liping Han [Opens in a new window] ,
Guorui Han Open the ORCID record for Guorui Han [Opens in a new window]  and
Yufeng Liu Open the ORCID record for Yufeng Liu [Opens in a new window]
Kun Chai
Affiliation:
School of Physics and Electronic Engineering, Shanxi University, Shanxi, China
Zhi Li
Affiliation:
School of Physics and Electronic Engineering, Shanxi University, Shanxi, China
Yajuan Zhao
Affiliation:
China-Belarus Belt and Road Joint Laboratory on Electromagnetic Environment Effect, No. 33 Research Institute of China Electronics Technology Group Corporation, Taiyuan, China
Liping Han*
Affiliation:
School of Physics and Electronic Engineering, Shanxi University, Shanxi, China
Guorui Han
Affiliation:
School of Physics and Electronic Engineering, Shanxi University, Shanxi, China
Yufeng Liu
Affiliation:
School of Physics and Electronic Engineering, Shanxi University, Shanxi, China
*
Corresponding author: Liping Han; Email: hlp@sxu.edu.cn
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Abstract

A low-profile wideband circularly polarized (CP) metasurface antenna is demonstrated for C-band applications. The metasurface consists of 4 × 4 square patches with Z-shaped slots. Characteristic mode analysis is used to investigate the modal behavior of the metasurface, and a pair of degenerate modes is chosen as the operating modes. The CP radiation is realized by exciting a pair of degenerate modes of the metasurface through a slot antenna, which is used as a feed structure with a 90° phase difference. The CP bandwidth is further widened by combining the resonance modes of the metasurface and slot antenna. The measured results show that the −10 dB impedance bandwidth of the antenna is 3.47–4.76 GHz, and the 3 dB axial ratio bandwidth is 3.5–4.9 GHz with a peak gain of 6.9 dBic. Moreover, the antenna exhibits well left-hand CP radiation performances with a low profile of 0.046λ0.

Keywords

characteristic mode analysiscircularly polarizedlow profilemetasurfacewideband
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , First View , pp. 1 - 8
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Copyright
© The Author(s), 2023. Published by Cambridge University Press in association with the European Microwave Association

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