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Optimal antenna currents for Q, superdirectivity, and radiation patterns using convex optimization

Gustafsson, Mats LU orcid and Nordebo, Sven LU (2013) In IEEE Transactions on Antennas and Propagation 61(3). p.1109-1118
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.
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author
and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
small antennas, convex optimization, Q-factor
in
IEEE Transactions on Antennas and Propagation
volume
61
issue
3
pages
1109 - 1118
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • wos:000315958300012
  • scopus:84874852140
ISSN
0018-926X
DOI
10.1109/TAP.2012.2227656
language
English
LU publication?
yes
id
bd95199d-faed-4a92-81bd-7c4a0143a5a9 (old id 3132025)
date added to LUP
2016-04-01 13:58:58
date last changed
2022-04-14 07:24:51
@article{bd95199d-faed-4a92-81bd-7c4a0143a5a9,
  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.}},
  author       = {{Gustafsson, Mats and Nordebo, Sven}},
  issn         = {{0018-926X}},
  keywords     = {{small antennas; convex optimization; Q-factor}},
  language     = {{eng}},
  number       = {{3}},
  pages        = {{1109--1118}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  series       = {{IEEE Transactions on Antennas and Propagation}},
  title        = {{Optimal antenna currents for Q, superdirectivity, and radiation patterns using convex optimization}},
  url          = {{http://dx.doi.org/10.1109/TAP.2012.2227656}},
  doi          = {{10.1109/TAP.2012.2227656}},
  volume       = {{61}},
  year         = {{2013}},
}