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Fundamental bounds on MIMO antennas

Ehrenborg, Casimir LU and Gustafsson, Mats LU (2017) In IEEE Antennas and Wireless Propagation Letters
Abstract

Antenna current optimization is often used to analyze the optimal performance of antennas. Antenna performance can be quantified in <i>e.g.</i>, minimum Q-factor and radiation efficiency. The performance of MIMO antennas is more involved and, in general, a single parameter is not sufficient to quantify it. Here, the capacity of an idealized channel is used as the main performance quantity. An optimization problem in the current distribution for optimal capacity, measured in spectral efficiency, given a fixed Q-factor and radiation efficiency is formulated as a semi-definite optimization problem. A model order reduction based on characteristic and energy modes is employed to improve the computational... (More)

Antenna current optimization is often used to analyze the optimal performance of antennas. Antenna performance can be quantified in <i>e.g.</i>, minimum Q-factor and radiation efficiency. The performance of MIMO antennas is more involved and, in general, a single parameter is not sufficient to quantify it. Here, the capacity of an idealized channel is used as the main performance quantity. An optimization problem in the current distribution for optimal capacity, measured in spectral efficiency, given a fixed Q-factor and radiation efficiency is formulated as a semi-definite optimization problem. A model order reduction based on characteristic and energy modes is employed to improve the computational efficiency. The performance bound is illustrated by solving the optimization problem numerically for rectangular plates and spherical shells.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
epub
subject
keywords
Convex optimization, MIMO, Physical bounds, Q-factor, Semidefinite programming
in
IEEE Antennas and Wireless Propagation Letters
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • scopus:85034224913
ISSN
1536-1225
DOI
10.1109/LAWP.2017.2772032
language
English
LU publication?
yes
id
a437c53a-f01f-41b0-a1d0-93cf4f091cd2
date added to LUP
2017-12-08 09:37:52
date last changed
2018-01-07 12:27:47
@article{a437c53a-f01f-41b0-a1d0-93cf4f091cd2,
  abstract     = {<p>Antenna current optimization is often used to analyze the optimal performance of antennas. Antenna performance can be quantified in &amp;lt;i&amp;#x003E;e.g.&amp;lt;/i&amp;#x003E;, minimum Q-factor and radiation efficiency. The performance of MIMO antennas is more involved and, in general, a single parameter is not sufficient to quantify it. Here, the capacity of an idealized channel is used as the main performance quantity. An optimization problem in the current distribution for optimal capacity, measured in spectral efficiency, given a fixed Q-factor and radiation efficiency is formulated as a semi-definite optimization problem. A model order reduction based on characteristic and energy modes is employed to improve the computational efficiency. The performance bound is illustrated by solving the optimization problem numerically for rectangular plates and spherical shells.</p>},
  author       = {Ehrenborg, Casimir and Gustafsson, Mats},
  issn         = {1536-1225},
  keyword      = {Convex optimization,MIMO,Physical bounds,Q-factor,Semidefinite programming},
  language     = {eng},
  month        = {11},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  series       = {IEEE Antennas and Wireless Propagation Letters},
  title        = {Fundamental bounds on MIMO antennas},
  url          = {http://dx.doi.org/10.1109/LAWP.2017.2772032},
  year         = {2017},
}