A Wearable Wideband Circularly Polarized Textile Antenna for Effective Power Transmission on a Wirelessly-Powered Sensor Platform

Author

Lui, K.W. ; Murphy, O.H. ; Toumazou, Christofer

Author_Institution

Dept. of Electr. & Electron. Eng, Imperial Coll. London, London, UK

Volume

61

Issue

7

fYear

2013

fDate

7/1/2013 12:00:00 AM

Firstpage

3873

Lastpage

3876

Abstract

In this communication, the simulation and experimental results of a novel wideband wearable circularly polarized textile antenna for low-power transmission in the 2.45 GHz ISM band are presented. The wide impedance and axial ratio bandwidths make it perfect for low microwave power transmission to a wearable sensor system. The antenna is flexible, robust and light weight so that it can be easily integrated into clothes. It is shown that the circularly polarized textile antenna has a 3-dB axial ratio bandwidth of 564 MHz (23%) and a -10dB impedance bandwidth of 1086 MHz (44%) on a human body with the maximum gain of 4.9 dBic. Lastly, the textile antenna is employed on the battery-less temperature sensor system on a human arm to demonstrate the effective power transmission over a metre distance.

Keywords

UHF antennas; broadband antennas; flexible electronics; microwave power transmission; temperature sensors; wearable antennas; wireless sensor networks; ISM band; axial ratio bandwidths; bandwidth 1086 MHz; batteryless temperature sensor system; frequency 2.45 GHz; gain -10 dB; gain 3 dB; human arm; low microwave power transmission; low-power transmission; wearable sensor system; wearable wideband circularly polarized textile antenna; wide impedance; wirelessly-powered sensor platform; Broadband antenna; ISM band; circular polarization; energy harvesting; textile antennas; wireless temperature sensor;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2013.2255094

Filename

6488737