Dual-Mode Patch Antenna With Capacitive Coupling Structure for On-/Off-Body Applications

A dual-band dual-mode antenna for on-/off-body centric communications is proposed for 2.4 and 5.8 GHz industrial scientific medical bands. Using polydimethylsiloxane as substrate, the proposed antenna has a compact structure and is easy to wear. The on-body mode is realized by a circular patch loade...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2022-08, Vol.21 (8), p.1512-1516
Main Authors: Gao, Guo-Ping, Dou, Zhi-Heng, Yu, Zhuo-Qi, Zhang, Ben-Kai, Dong, Jing-Hang, Hu, Bin
Format: Article
Language:English
Subjects:
and Medical (ISM) bands
Antenna measurements
Antenna radiation patterns
Antennas
Banded structure
Capacitive coupling
dual-band dual-mode antenna
Human performance
Human tissues
Industrial
Microstrip antennas
on-/off-body
Patch antennas
Pins
Polydimethylsiloxane
Resonant frequency
Scientific
Substrates
wide bandwidth
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Summary:A dual-band dual-mode antenna for on-/off-body centric communications is proposed for 2.4 and 5.8 GHz industrial scientific medical bands. Using polydimethylsiloxane as substrate, the proposed antenna has a compact structure and is easy to wear. The on-body mode is realized by a circular patch loaded with four symmetrically distributed metallic vias to generate TM_{\mathbf{01}} mode located on the lower substrate. The off-body mode is achieved by a smaller circular patch on the top of the upper substrate, which generates a directional radiation pattern by exciting its TM_{\mathbf{11}} mode. The measured operating bandwidths of the proposed antenna in two bands are 90 MHz (2.40-2.49 GHz) and 330 MHz (5.63-5.96 GHz), respectively. Average gain for the on-body mode is -2.38 dBi and for the off-body mode is 6.67 dBi. In addition, the antenna exhibits a robust performance near human tissue and low specific absorption rate values.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2022.3170555