Dual-Band Dual-Mode Button Antenna for On-Body and Off-Body Communications

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Article number7933232
Pages (from-to)933-941
Number of pages9
Journal / PublicationIEEE Transactions on Biomedical Circuits and Systems
Volume11
Issue number4
Online published24 May 2017
Publication statusPublished - Aug 2017

Abstract

A dual-band dual-mode button antenna for body centric communications is presented. At the lower band, a spiral inverted-F antenna is designed with omnidirectional radiation pattern for on-body communication. At the upper band, the high-order mode of the inverted-F antenna is utilized together with a metal reflector to realize broadside radiation for off-body communication. For demonstration, a prototype is implemented. The measured peak gains on the phantom at the lower and upper bands are −0.6 and 4.3 dBi, respectively. The antenna operating on the phantom has measured efficiencies of 46.3% at the lower band and 69.3% at the upper band. The issue of specific absorption rate (SAR) is studied. The maximum transmitted power under the SAR regulation of 1.6 W/kg is found to be 26.4 dB·m, which is high enough for body centric communications. In addition, the transmission performance between two proposed antennas mounted on the body is investigated by measuring the transmission loss. With an overall miniaturized size, the robust button antenna could be integrated in clothes and be a potential candidate for wireless body area network applications.

Citation Format(s)

Dual-Band Dual-Mode Button Antenna for On-Body and Off-Body Communications. / Zhang, Xiu Yin; Wong, Hang; Mo, Te et al.

In: IEEE Transactions on Biomedical Circuits and Systems, Vol. 11, No. 4, 7933232, 08.2017, p. 933-941.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review