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Equivalent circuit based calculation of signal correlation in lossy MIMO antennas

Li, Hui LU ; Lin, Xianqi ; Lau, Buon Kiong LU and He, Sailing (2013) In IEEE Transactions on Antennas and Propagation 61(10). p.5214-5222
Abstract
Correlation coefficient of received signals across a pair of antennas is a key performance indicator for multiple-input multiple-output (MIMO) systems. For multipath environments with uniform 3D angular power spectrum, the signal correlation between two antennas can be exactly calculated from their 3D radiation patterns. When radiation patterns are unavailable, a simplified approach that only requires the antennas’ scattering parameters can be used instead. However, the simpler method assumes lossless antennas and thus only works well for antennas with high radiation efficiencies. To take into account the antenna loss, the idea of equivalent circuit approximation is used in this paper to analytically separate the lossy components... (More)
Correlation coefficient of received signals across a pair of antennas is a key performance indicator for multiple-input multiple-output (MIMO) systems. For multipath environments with uniform 3D angular power spectrum, the signal correlation between two antennas can be exactly calculated from their 3D radiation patterns. When radiation patterns are unavailable, a simplified approach that only requires the antennas’ scattering parameters can be used instead. However, the simpler method assumes lossless antennas and thus only works well for antennas with high radiation efficiencies. To take into account the antenna loss, the idea of equivalent circuit approximation is used in this paper to analytically separate the lossy components (resistance or conductance) from the lossy antenna arrays, using known scattering parameters and radiation efficiencies. The simplified method using S parameters can then be applied to obtain the correlation coefficient of the equivalent lossless antennas. The effectiveness of the method has been verified on antennas operating at a single mode, such as dipole or patch at its lowest resonant frequency. Good results were also obtained for the measured case of a dual-antenna mobile terminal, consisting of a monopole and a PIFA. (Less)
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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
IEEE Transactions on Antennas and Propagation
volume
61
issue
10
pages
5214 - 5222
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • wos:000326831000034
  • scopus:84885633932
ISSN
0018-926X
DOI
10.1109/TAP.2013.2273212
project
EIT_ANTCHN Antenna-Channel Harmonization for Throughput Enhancement in Advanced Mobile Terminals
EIT_Optantsys Novel Antenna System Design Paradigm for High Performance Mobile Communications
language
English
LU publication?
yes
id
e63d8c08-5139-450e-aff8-8c37e7e92ac4 (old id 3915632)
date added to LUP
2016-04-01 14:09:05
date last changed
2022-01-27 23:01:21
@article{e63d8c08-5139-450e-aff8-8c37e7e92ac4,
  abstract     = {{Correlation coefficient of received signals across a pair of antennas is a key performance indicator for multiple-input multiple-output (MIMO) systems. For multipath environments with uniform 3D angular power spectrum, the signal correlation between two antennas can be exactly calculated from their 3D radiation patterns. When radiation patterns are unavailable, a simplified approach that only requires the antennas’ scattering parameters can be used instead. However, the simpler method assumes lossless antennas and thus only works well for antennas with high radiation efficiencies. To take into account the antenna loss, the idea of equivalent circuit approximation is used in this paper to analytically separate the lossy components (resistance or conductance) from the lossy antenna arrays, using known scattering parameters and radiation efficiencies. The simplified method using S parameters can then be applied to obtain the correlation coefficient of the equivalent lossless antennas. The effectiveness of the method has been verified on antennas operating at a single mode, such as dipole or patch at its lowest resonant frequency. Good results were also obtained for the measured case of a dual-antenna mobile terminal, consisting of a monopole and a PIFA.}},
  author       = {{Li, Hui and Lin, Xianqi and Lau, Buon Kiong and He, Sailing}},
  issn         = {{0018-926X}},
  language     = {{eng}},
  number       = {{10}},
  pages        = {{5214--5222}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  series       = {{IEEE Transactions on Antennas and Propagation}},
  title        = {{Equivalent circuit based calculation of signal correlation in lossy MIMO antennas}},
  url          = {{https://lup.lub.lu.se/search/files/42807389/li_tap2013.pdf}},
  doi          = {{10.1109/TAP.2013.2273212}},
  volume       = {{61}},
  year         = {{2013}},
}