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Fundamental bounds on MIMO antennas

Ehrenborg, Casimir LU and Gustafsson, Mats LU (2017) In Technical Report LUTEDX/(TEAT-7247)/1-11/(2017)
Abstract
Antenna current optimization is often used to analyze the optimal perfor-
mance of antennas. Antenna performance can be quantied in e.g., minimum
Q-factor and maximal gain over Q-factor ratio. The performance of MIMO
antennas is more involved and a single parameter is, in general, not sucient
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 eciency, given a xed Q-factor
and eciency is formulated as a semi-denite optimization problem. A model
order reduction based on characteristic and energy modes is employed to im-
prove the computational eciency. The bound... (More)
Antenna current optimization is often used to analyze the optimal perfor-
mance of antennas. Antenna performance can be quantied in e.g., minimum
Q-factor and maximal gain over Q-factor ratio. The performance of MIMO
antennas is more involved and a single parameter is, in general, not sucient
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 eciency, given a xed Q-factor
and eciency is formulated as a semi-denite optimization problem. A model
order reduction based on characteristic and energy modes is employed to im-
prove the computational eciency. The bound is illustrated by solving the
optimization problem numerically for a rectangular plate. (Less)
Please use this url to cite or link to this publication:
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organization
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Book/Report
publication status
published
subject
in
Technical Report LUTEDX/(TEAT-7247)/1-11/(2017)
pages
11 pages
publisher
Electromagnetic Theory Department of Electrical and Information Technology Lund University Sweden
language
English
LU publication?
yes
id
3a5b0e57-3c33-418f-a284-7778a38dfa29
date added to LUP
2017-04-13 15:25:06
date last changed
2017-08-02 09:21:40
@techreport{3a5b0e57-3c33-418f-a284-7778a38dfa29,
  abstract     = {Antenna current optimization is often used to analyze the optimal perfor-<br/>mance of antennas. Antenna performance can be quantied in e.g., minimum<br/>Q-factor and maximal gain over Q-factor ratio. The performance of MIMO<br/>antennas is more involved and a single parameter is, in general, not sucient<br/>to quantify it. Here, the capacity of an idealized channel is used as the main<br/>performance quantity. An optimization problem in the current distribution<br/>for optimal capacity, measured in spectral eciency, given a xed Q-factor<br/>and eciency is formulated as a semi-denite optimization problem. A model<br/>order reduction based on characteristic and energy modes is employed to im-<br/>prove the computational eciency. The bound is illustrated by solving the<br/>optimization problem numerically for a rectangular plate.},
  author       = {Ehrenborg, Casimir and Gustafsson, Mats},
  institution  = {Electromagnetic Theory Department of Electrical and Information Technology Lund University Sweden},
  language     = {eng},
  month        = {04},
  pages        = {11},
  series       = {Technical Report LUTEDX/(TEAT-7247)/1-11/(2017)},
  title        = {Fundamental bounds on MIMO antennas},
  year         = {2017},
}