Title :
Impedance behaviour of planar UWB antennas in the vicinity of a dispersive tissue model
Author :
Tuovinen, Tommi ; Berg, Markus ; Yazdandoost, Kamya Yekeh ; Salonen, E. ; Iinatti, Jari
Author_Institution :
Centre for Wireless Commun., Univ. of Oulu, Oulu, Finland
Abstract :
In Ultra Wideband (UWB) Wireless Body Area Network (WBAN) systems, the propagation environment is comprising free space and lossy medium (human body tissues), which have a very strong effect on the antenna operation. This paper investigates the UWB antenna-body tissues interaction in terms of the reflection coefficient and input impedance behavior through the range of 0-30 mm away from the body surface. Planar UWB antennas are exploited in the investigations. A layered tissue model based on the Debye´s dispersion model for UWB frequencies is used in simulations. Observations are considered in relation to the antenna near-field regions and the size, i.e., the boundary distance of antenna´s reactive near-field is noticed to be the important factor in the evaluation of the shortest antenna-body operating distance.
Keywords :
biological tissues; body area networks; planar antennas; radiowave propagation; ultra wideband antennas; UWB antenna-body tissues interaction; body surface; dispersive tissue model; distance 0 mm to 30 mm; free space; human body tissue; impedance behaviour; input impedance behavior; lossy media; planar UWB antenna; propagation environment; reflection coefficient; ultrawideband wireless body area network; Antenna radiation patterns; Dipole antennas; Impedance; Ultra wideband antennas; Wireless communication; Ultra Wideband (UWB) antenna; Wireless Body Area Network (WBAN) UWB systems; human body effect; near-field region;
Conference_Titel :
Antennas and Propagation Conference (LAPC), 2012 Loughborough
Conference_Location :
Loughborough
Print_ISBN :
978-1-4673-2218-8
Electronic_ISBN :
978-1-4673-2219-5
DOI :
10.1109/LAPC.2012.6403006
