DocumentCode
761225
Title
Physical limitations of antenna
Author
Geyi, Wen
Author_Institution
Research In Motion, Waterloo, Ont., Canada
Volume
51
Issue
8
fYear
2003
Firstpage
2116
Lastpage
2123
Abstract
A discussion of minimum possible antenna quality factor (Q) is first presented . Based on the spherical wave function theory, the maximum possible ratios of gain to Q for both directional antenna and omnidirectional antenna are examined and new upper limits for both cases have been obtained. Universally applicable numerical results and some related discussions are also included.
Keywords
Q-factor; directive antennas; modal analysis; antenna physical limitations; antenna quality factor; directional antenna; maximum gain to Q ratio; omnidirectional antenna; radiated power; small antennas; spherical mode theory; spherical wave function; time averaged stored energy; upper limits; Antenna theory; Bandwidth; Directional antennas; Directive antennas; Electromagnetic fields; Helium; Polarization; Polynomials; Q factor; Wave functions;
fLanguage
English
Journal_Title
Antennas and Propagation, IEEE Transactions on
Publisher
ieee
ISSN
0018-926X
Type
jour
DOI
10.1109/TAP.2003.814754
Filename
1219625
Link To Document