Title :
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
fDate :
7/1/2013 12:00:00 AM
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;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2013.2255094
