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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)

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