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Multi-band circularly polarized antenna for WLAN and WiMAX applications based on characteristic mode theory

Published online by Cambridge University Press:  01 February 2024

Yutong Yang ,
Zihang Qi Open the ORCID record for Zihang Qi [Opens in a new window] ,
Yongxin Chen  and
Xiuping Li
Yutong Yang
Affiliation:
State Key Laboratory of Information Photonics and Optical Communications, The Key Laboratory of Universal Wireless Communications of Ministry of Education, Beijing Key Laboratory of Work Safety Intelligent Monitoring, The School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing, China
Zihang Qi*
Affiliation:
State Key Laboratory of Information Photonics and Optical Communications, The Key Laboratory of Universal Wireless Communications of Ministry of Education, Beijing Key Laboratory of Work Safety Intelligent Monitoring, The School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing, China
Yongxin Chen
Affiliation:
State Key Laboratory of Information Photonics and Optical Communications, The Key Laboratory of Universal Wireless Communications of Ministry of Education, Beijing Key Laboratory of Work Safety Intelligent Monitoring, The School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing, China
Xiuping Li
Affiliation:
State Key Laboratory of Information Photonics and Optical Communications, The Key Laboratory of Universal Wireless Communications of Ministry of Education, Beijing Key Laboratory of Work Safety Intelligent Monitoring, The School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing, China
*
Corresponding author: Zihang Qi; Email: qizihang@bupt.edu.cn
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Abstract

A multi-band circularly polarized antenna is proposed for WLAN (2.4/5.3/5.8 GHz) and WiMAX (3.5 GHz) applications. The proposed antenna is constructed of a radiation patch and a reflecting metal ground. Characteristic mode theory is utilized to analyze the modes of the patch and based on these results the antenna is optimized. The −10 dB impedance bandwidths of the proposed antenna are 53.53% (2.4–4.15 GHz) and 47.28% (5.25–8.5 GHz), respectively. The antenna radiates left-handed circular polarization in the lower band and right-handed circular polarization in the upper band. A maximum gain of 10 dBic is achieved for the proposed antenna.

Keywords

broadbandcharacteristic mode theorycircular polarizationmulti-band antenna
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , First View , pp. 1 - 9
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Copyright
© The Author(s), 2024. Published by Cambridge University Press in association with the European Microwave Association

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