Title :
The minimum value for the quality factor of an electrically small antenna in spheroidal coordinates – TM case
Author :
Hansen, Peder M. ; Adams, Richard
Author_Institution :
Electromagn. & Adv. Technol. Div., SPAWAR Syst. Center Pacific, San Diego, CA, USA
Abstract :
This paper presents results for the minimum possible radiation Q of an antenna contained within a spheroidal volume (oblate or prolate) as a function of the spheroid aspect ratio, and size with respect to a wavelength. The variation with aspect ratio gives additional information on the effect of antenna shape. The results in this paper are limited to the case of omni-directional TM modes with no energy stored within the spheroid.
Keywords :
Q-factor; antenna radiation patterns; antenna shape; electrically small antenna; minimum quality factor value; omnidirectional TM modes; spheroid aspect ratio; spheroidal coordinates; Dipole antennas; Eigenvalues and eigenfunctions; Q factor; Shape; Web sites;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2010 IEEE
Conference_Location :
Toronto, ON
Print_ISBN :
978-1-4244-4967-5
DOI :
10.1109/APS.2010.5562012
