Title :
An analysis of the normal mode helical antenna close to the human abdomen in the VHF-band
Author :
Koyanagi, Yoshio ; Ogawa, Koichi ; Asahina, Toshihiro ; Ito, Kei
Author_Institution :
Personal Commun. Div., Matsushita Commun. Ind. Co. Ltd., Yokohama, Japan
Abstract :
An analysis of the performance of the normal mode helical antenna for portable radio terminals, close to the human abdomen has been performed. In the VHF-band it is shown that the impedance mismatch loss is the major contributory factor to the total power loss and it must be taken into account when calculating the radiation efficiency of the antennas.
Keywords :
VHF antennas; antenna radiation patterns; electric impedance; helical antennas; mobile antennas; 150 MHz; VHF-band; human abdomen; impedance mismatch loss; normal mode helical antenna; portable radio terminals; radiation efficiency; total power loss; Abdomen; Biological system modeling; Biological tissues; Circuits; Communication industry; Dipole antennas; Helical antennas; Humans; Impedance matching; Surface impedance;
Conference_Titel :
Antennas, Propagation and EM Theory, 2000. Proceedings. ISAPE 2000. 5th International Symposium on
Conference_Location :
Beijing, China
Print_ISBN :
0-7803-6377-9
DOI :
10.1109/ISAPE.2000.894797
