Antenna currents for optimal Q, superdirectivity, and radiation patterns using convex optimization
Author
Summary, in English
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 give 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-field are presented. The effects of antennas embedded in structures are also discussed. The results are illustrated for planar geometries.
Publishing year
2012
Language
English
Publication/Series
Technical Report LUTEDX/(TEAT-7216)/1-21/(2012)
Full text
Document type
Report
Publisher
[Publisher information missing]
Topic
- Electrical Engineering, Electronic Engineering, Information Engineering
Keywords
- Antenna theory
- Physical limitations
- Antenna Q
- Superdirectivity
- small antennas
- Convex optimization
Status
Published
Report number
TEAT-7216
Research group
- Electromagnetic theory