Title :
Method for measuring user-induced load on mobile terminal antenna
Author :
Myllymaki, S. ; Huttunen, Arttu ; Berg, Markus ; Komulainen, M. ; Jantunen, H.
Author_Institution :
Microelectron. & Mater. Phys. Labs., Univ. of Oulu, Oulu, Finland
Abstract :
A method for measuring user-induced load on a triple-band GSM PIFA antenna is presented. The capacitance, total efficiency and matching of the antenna were measured in terms of the increased load of a phantom hand. Up to 10% tuning of the centre frequency occurred, with from 52 to 15% decreased total efficiency owing to the undesired hand grip. The comparable capacitance increased proportionally from 3.83 to 4.45 pF, allowing evaluation of the magnitude of the load.
Keywords :
cellular radio; impedance matching; mobile antennas; multifrequency antennas; planar inverted-F antennas; capacitance 3.83 pF to 4.45 pF; centre frequency tuning; impedance matching; mobile terminal antenna; phantom hand; triple-band GSM PIFA antenna; user-induced load measurement;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2009.1728
