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Antenna matching for capacity maximization in compact MIMO systems

Lau, Buon Kiong LU ; Bach Andersen, Jørgen; Molisch, Andreas LU and Kristensson, Gerhard LU (2006) 3rd International Symposium on Wireless Communication Systems (ISWCS) In 3rd International Symposium on Wireless Communication Systems p.253-257
Abstract
As MIMO technology slowly matures, it is finding its way into more wireless applications. However, some important applications, including mobile communications, require compact implementations. One important challenge in miniaturizing MIMO systems for compact terminals is to overcome capacity performance degradation resulting from mutual coupling among closely separated antennas. In this contribution, we begin with a review of the state-of-the-art, with particular emphasis on impedance matching and its impact on capacity. Whereas it has been shown that a multiport extension of the conjugate match is optimum in a reference environment with uniform 3D angular power spectrum, its bandwidth is severely reduced by decreasing antenna separation.... (More)
As MIMO technology slowly matures, it is finding its way into more wireless applications. However, some important applications, including mobile communications, require compact implementations. One important challenge in miniaturizing MIMO systems for compact terminals is to overcome capacity performance degradation resulting from mutual coupling among closely separated antennas. In this contribution, we begin with a review of the state-of-the-art, with particular emphasis on impedance matching and its impact on capacity. Whereas it has been shown that a multiport extension of the conjugate match is optimum in a reference environment with uniform 3D angular power spectrum, its bandwidth is severely reduced by decreasing antenna separation. On the other hand, noncoupled, individual port matching is inherently simpler to implement and broader in bandwidth, but offers a smaller capacity. Here, we demonstrate that mean capacity can be easily maximized with respect to individual port matching in a given random field. The extent of capacity gains provided by the optimized matching network over existing individual port matching networks strongly depends on the propagation environment. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
compact MIMO systems, multiport extension, port matching, impedance matching, antenna separation, 3D angular power spectrum, antenna matching, mutual coupling, mobile communications, capacity maximization
in
3rd International Symposium on Wireless Communication Systems
pages
253 - 257
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
conference name
3rd International Symposium on Wireless Communication Systems (ISWCS)
external identifiers
  • WOS:000251016900052
  • Scopus:47249089682
language
English
LU publication?
yes
id
39831e06-dbe6-43fe-9b35-67efd817c275 (old id 643332)
date added to LUP
2007-12-04 14:19:46
date last changed
2016-10-13 04:43:11
@misc{39831e06-dbe6-43fe-9b35-67efd817c275,
  abstract     = {As MIMO technology slowly matures, it is finding its way into more wireless applications. However, some important applications, including mobile communications, require compact implementations. One important challenge in miniaturizing MIMO systems for compact terminals is to overcome capacity performance degradation resulting from mutual coupling among closely separated antennas. In this contribution, we begin with a review of the state-of-the-art, with particular emphasis on impedance matching and its impact on capacity. Whereas it has been shown that a multiport extension of the conjugate match is optimum in a reference environment with uniform 3D angular power spectrum, its bandwidth is severely reduced by decreasing antenna separation. On the other hand, noncoupled, individual port matching is inherently simpler to implement and broader in bandwidth, but offers a smaller capacity. Here, we demonstrate that mean capacity can be easily maximized with respect to individual port matching in a given random field. The extent of capacity gains provided by the optimized matching network over existing individual port matching networks strongly depends on the propagation environment.},
  author       = {Lau, Buon Kiong and Bach Andersen, Jørgen and Molisch, Andreas and Kristensson, Gerhard},
  keyword      = {compact MIMO systems,multiport extension,port matching,impedance matching,antenna separation,3D angular power spectrum,antenna matching,mutual coupling,mobile communications,capacity maximization},
  language     = {eng},
  pages        = {253--257},
  publisher    = {ARRAY(0xc38bf80)},
  series       = {3rd International Symposium on Wireless Communication Systems},
  title        = {Antenna matching for capacity maximization in compact MIMO systems},
  year         = {2006},
}