DocumentCode
742445
Title
Optimal Antenna Currents for Q, Superdirectivity, and Radiation Patterns Using Convex Optimization
Author
Gustafsson, Mats ; Nordebo, Sven
Author_Institution
Dept. of Electr. & Inf. Technol., Lund Univ., Lund, Sweden
Volume
61
Issue
3
fYear
2013
fDate
3/1/2013 12:00:00 AM
Firstpage
1109
Lastpage
1118
Abstract
The high Q-factor (low bandwidth) and low efficiency make the design of small antennas challenging. Here, convex optimization is used to determine current distributions that provide upper bounds on the antenna performance. Optimization formulations for maximal gain Q-factor quotient, minimal Q-factor for superdirectivity, and minimum Q for given far-fields are presented. The effects of antennas embedded in structures are also discussed. The results are illustrated for planar geometries.
Keywords
Q-factor; antenna radiation patterns; convex programming; geometry; antenna radiation patterns; convex optimization; current distributions; high Q-factor; optimal antenna currents; planar geometries; superdirectivity; Antenna radiation patterns; Convex functions; Dipole antennas; Optimization; Q factor; Vectors; Antenna Q; antenna theory; convex optimization; physical limitations; small antennas; superdirectivity;
fLanguage
English
Journal_Title
Antennas and Propagation, IEEE Transactions on
Publisher
ieee
ISSN
0018-926X
Type
jour
DOI
10.1109/TAP.2012.2227656
Filename
6353527
Link To Document