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Type: Journal article
Title: Wearable applications of quarter-wave patch and half-mode cavity antennas
Author: Liu, F.
Kaufmann, T.
Xu, Z.
Fumeaux, C.
Citation: IEEE Antennas and Wireless Propagation Letters, 2015; 14:1478-1481
Publisher: IEEE
Issue Date: 2015
ISSN: 1536-1225
Statement of
Feng-Xue Liu, Thomas Kaufmann, Zhao Xu, and Christophe Fumeaux
Abstract: The quarter-wave patch and half-mode cavity antennas are two typical designs of half-size resonator antennas that are suitable for wearable applications. Despite their similar appearance, they have distinctively different properties. In this letter, the quarter-wave patch and rectangular half-mode cavity antennas are first theoretically analysed with a cavity model to allow a direct comparison of size and internal field distribution. On that basis, wearable realizations of those two antennas using embroidered conductive shorting/side walls are investigated. It is demonstrated through full-wave simulations that the designs need to consider the resonance frequency stability against compression at seams, and that design optimization for both antennas will benefit from taking into account all expected bending conditions. With this procedure, the overall operational bandwidth over a range of bending conditions can be markedly improved, and a drift of the resonance frequency with bending can be mitigated. Realizations of the two antennas with conductive textiles and embroidered conductive threads for operation at 2.45 GHz validate the findings.
Keywords: Half-mode cavity; operational bandwidth; quarter-wave patch; seam compression; wearable antennas
Rights: © 2014 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission. See for more information.
DOI: 10.1109/LAWP.2014.2383399
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Appears in Collections:Aurora harvest 3
Electrical and Electronic Engineering publications

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