DocumentCode :
258202
Title :
On-body antenna with reconfigurable radiation pattern
Author :
Dumanli, Sema
Author_Institution :
Telecommun. Res. Lab., Toshiba Res. Eur. Ltd., Bristol, UK
fYear :
2014
fDate :
8-10 Dec. 2014
Firstpage :
1
Lastpage :
3
Abstract :
On body antenna design is a challenging task due to the body being in the near-field of the antenna and the interaction between the two. The antenna should be designed to have a more application dependent gain pattern and to be less sensitive to near field effects of the body. For the case of on-body links, the antenna radiation should be directed along the body with an omni-directional pattern in horizontal plane of the antenna. It should preferably have vertical polarization. For the case of off-body links, the antenna radiation should be directed away from the body while the polarisation is not as critical as the on-body case. This paper presents a novel antenna design tackling the aforementioned challenges by exciting TM00 mode of a shorted rectangular patch antenna for the on-body link and exciting the TM01 mode for the off-body links. By means of a switching mechanism, either the on-body operation or the off-body operation is activated at 2.45 GHz with 64% and 75% efficiency respectively.
Keywords :
antenna radiation patterns; biomedical telemetry; body area networks; body sensor networks; microstrip antennas; polarisation; telemedicine; TM00 mode excitation; TM01 mode excitation; antenna application dependent gain pattern; antenna horizontal plane; antenna near-field; antenna radiation direction; body-antenna interaction; frequency 2.45 GHz; near field effect sensitivity; off-body link; off-body operation activation; omni-directional pattern; on-body antenna design; on-body link; on-body operation activation; polarisation; reconfigurable radiation pattern; shorted rectangular patch antenna; switching mechanism; vertical polarization; Antenna measurements; Antenna radiation patterns; Patch antennas; Resonant frequency; Switches; Antenna radiation patterns; Body sensor networks; Patch antennas;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
RF and Wireless Technologies for Biomedical and Healthcare Applications (IMWS-Bio), 2014 IEEE MTT-S International Microwave Workshop Series on
Conference_Location :
London
Print_ISBN :
978-1-4799-5445-2
Type :
conf
DOI :
10.1109/IMWS-BIO.2014.7032385
Filename :
7032385
Link To Document :
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