DocumentCode :
1393036
Title :
Lower Bound for the Radiation 
of Electrically Small Magnetic Dipole Antennas With Solid Magnetodielectric Core
Author :
Kim, Oleksiy S. ; Breinbjerg, Olav
Author_Institution :
Dept. of Electr. Eng., Tech. Univ. of Denmark, Lyngby, Denmark
Volume :
59
Issue :
2
fYear :
2011
Firstpage :
679
Lastpage :
681
Abstract :
A new lower bound for the radiation Q of electrically small spherical magnetic dipole antennas with solid magnetodielectric core is derived in closed form using the exact theory. The new bound approaches the Chu lower bound from above as the antenna electrical size decreases. For ka <; 0.863, the new bound is lower than the bounds for spherical magnetic as well as electric dipole antennas composed of impressed electric currents in free space.
Keywords :
antenna radiation patterns; dipole antennas; Chu lower bound; electric currents; electrically small spherical magnetic dipole antennas; exact theory; solid magnetodielectric core; Chu lower bound; electrically small antennas; fundamental limitations; magnetic dipole; quality factor;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.2010.2096394
Filename :
5654643
Link To Document :
