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Title: Design of a liquid crystal beam-steerable antenna with characteristic mode analysis
Authors: Shu, Jun
Zhang, Yueping
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2022
Source: Shu, J. & Zhang, Y. (2022). Design of a liquid crystal beam-steerable antenna with characteristic mode analysis. IET Microwaves, Antennas and Propagation, 16(1), 29-36.
Journal: IET Microwaves, Antennas and Propagation
Abstract: A novel liquid crystal beam-steerable antenna is presented. It is a conventional liquid crystal microstrip patch antenna with a bending slot in the middle of the H-plane. Owing to the introduction of the bending slot, this antenna can work at even mode and odd mode within a frequency band. To obtain the resonant frequencies and radiation characteristics of the two modes, the method of characteristic mode analysis is utilised. It indicates that the resonant frequency of even mode is lower than that of odd mode. Therefore, by choosing liquid crystal as its substrate, this antenna can alter its operating modes by varying the permittivity of liquid crystal. Furthermore, beam steering can be realised since the radiation patterns of the two modes are divergent. An antenna prototype at Ka-band has been designed, fabricated and measured. The measured results show that the maximum radiation direction can scan from −30° to −2° continuously at 26.5 GHz in the H-plane.
ISSN: 1751-8725
DOI: 10.1049/mia2.12217
Schools: School of Electrical and Electronic Engineering 
Research Centres: Integrated Systems Research Lab
Rights: © 2021 The Authors. IET Microwaves, Antennas & Propagation published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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