DocumentCode :
1483763
Title :
Numerical analysis of bodyworn UHF antenna systems
Author :
Scanlon, W.G. ; Evans, N.E.
Author_Institution :
Centre for Commun. Eng., Ulster Univ., Newtownabbey, UK
Volume :
13
Issue :
2
fYear :
2001
fDate :
4/1/2001 12:00:00 AM
Firstpage :
53
Lastpage :
64
Abstract :
Bodyworn antennas are found in a wide range of medical, military and personal communication applications, yet reliable communication from the surface of the human body still presents a range of engineering challenges. At UHF and microwave frequencies, bodyworn antennas can suffer from reduced efficiency due to electromagnetic absorption in tissue, radiation pattern fragmentation and variations in feed-point impedance. The significance and nature of these effects are system specific and depend on the operating frequency, propagation environment and physical constraints on the antenna itself. This paper describes how numerical electromagnetic modelling techniques such as FDTD (finite-difference time-domain) can be used in the design of bodyworn antennas. Examples are presented for 418 MHz, 916·5 MHz and 2·45 GHz, in the context of both biomedical signalling and wireless personal-area networking applications such as the BluetoothTM wireless technology
Keywords :
UHF antennas; antenna radiation patterns; biological effects of fields; biological tissues; biomedical communication; electric impedance; electromagnetic wave absorption; finite difference time-domain analysis; military communication; mobile antennas; personal communication networks; 2.45 GHz; 418 MHz; 916.5 MHz; Bluetooth wireless technology; FDTD; biomedical signalling; bodyworn UHF antenna systems; electromagnetic absorption; feed-point impedance variations; finite-difference time-domain; medical applications; microwave frequencies; military communication applications; numerical analysis; numerical electromagnetic modelling; operating frequency; personal communication applications; propagation environment; radiation pattern fragmentation; tissue; wireless personal-area networking;
fLanguage :
English
Journal_Title :
Electronics & Communication Engineering Journal
Publisher :
iet
ISSN :
0954-0695
Type :
jour
DOI :
10.1049/ecej:20010203
Filename :
920677
Link To Document :
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