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A continuous frequency tuning Fabry–Perot Cavity antenna with stable radiation performance

Published online by Cambridge University Press:  02 February 2023

Lu-Yang Ji Open the ORCID record for Lu-Yang Ji [Opens in a new window]  and
Shuai Fu
Lu-Yang Ji*
Affiliation:
Northwestern Polytechnical University, No.129, Dongxiang Road, Chang'an District, Xi'an, Shaanxi Province 710129, China
Shuai Fu
Affiliation:
Northwest Regional Air Traffic Management Bureau of CAAC, Fengqing Road, Lianhu District, Xi'an, Shaanxi Province 710082, China
*
Author for correspondence: Lu-yang Ji, E-mail: luyangji@nwpu.edu.cn
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Abstract

This paper presents a continuous frequency tuning Fabry–Perot Cavity (FPC) antenna of which the operating frequency can be varied from 4.87 to 5.84 GHz (18.1%). The cavity of the proposed antenna is excited by a double-layer antenna structure, which is made up of a main square patch and a parasitic one. The superstrate is a frequency-selective surface, consisting of 6 × 6 square-patch-type unit cells. The frequency tuning property is realized by employing 48 phase-changing elements placed around the main patch, which forms a reconfigurable high impedance surface (HIS). By controlling the biasing voltages of the varactors inserted in the HIS element, its capacitances and reflection phases can be varied continuously, which leads to a variation of the operating frequency. An antenna prototype has been fabricated and measured for validation. The measured results are in good agreement with the simulated ones. In the frequency tuning range, the measured realized gains have a smaller variation from 10.2 to 14.1 dBi compared with other reported frequency tuning FPC antennas.

Keywords

Continuous frequency tuningreconfigurable FPC antennastable radiation performance
Type
Metamaterials and Photonic Bandagap Structures
Information
International Journal of Microwave and Wireless Technologies , Volume 15 , Issue 7 , September 2023 , pp. 1165 - 1171
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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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