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On impedance matching and bandwidth of compact antenna arrays

Lau, Buon Kiong LU ; Bach Andersen, Jørgen ; Kristensson, Gerhard LU and Molisch, Andreas LU (2005) COST273 Post Project Meeting
Abstract
We analyze the impact of the matching network on compact MIMO systems. Existing studies have found that the matching network has a significant influence on the performance of multiple antenna systems when the antennas

are in close proximity. However, none has examined the wideband case. In this paper, we investigate the wideband performance of four different matching networks for multiple dipole antennas. The performance of the matching networks is given in terms of the bandwidths of correlation and matching efficiency, which are extensions of the single-antenna concept of

bandwidth to multiple antenna systems. For a uniform 2D angular power spectrum, we find that while individual-port matching can achieve a large... (More)
We analyze the impact of the matching network on compact MIMO systems. Existing studies have found that the matching network has a significant influence on the performance of multiple antenna systems when the antennas

are in close proximity. However, none has examined the wideband case. In this paper, we investigate the wideband performance of four different matching networks for multiple dipole antennas. The performance of the matching networks is given in terms of the bandwidths of correlation and matching efficiency, which are extensions of the single-antenna concept of

bandwidth to multiple antenna systems. For a uniform 2D angular power spectrum, we find that while individual-port matching can achieve a large correlation bandwidth for envelope correlation of 0.5 at a small antenna separation of 0.01l, multiport matching is required for efficiency bandwidth to be defined for a return loss of −6dB. Moreover, even with

multiport matching, both correlation and efficiency bandwidths decrease drastically at small antenna separations. (Less)
Please use this url to cite or link to this publication:
author
; ; and
organization
publishing date
type
Contribution to conference
publication status
published
subject
pages
10 pages
conference name
COST273 Post Project Meeting
conference location
Lisbon, Portugal
conference dates
2005-11-10 - 2005-11-11
language
English
LU publication?
yes
id
8f90699d-de86-49f9-a022-842143041044 (old id 1269058)
date added to LUP
2016-04-04 13:53:53
date last changed
2018-11-21 21:17:02
@misc{8f90699d-de86-49f9-a022-842143041044,
  abstract     = {We analyze the impact of the matching network on compact MIMO systems. Existing studies have found that the matching network has a significant influence on the performance of multiple antenna systems when the antennas<br/><br>
are in close proximity. However, none has examined the wideband case. In this paper, we investigate the wideband performance of four different matching networks for multiple dipole antennas. The performance of the matching networks is given in terms of the bandwidths of correlation and matching efficiency, which are extensions of the single-antenna concept of<br/><br>
bandwidth to multiple antenna systems. For a uniform 2D angular power spectrum, we find that while individual-port matching can achieve a large correlation bandwidth for envelope correlation of 0.5 at a small antenna separation of 0.01l, multiport matching is required for efficiency bandwidth to be defined for a return loss of −6dB. Moreover, even with<br/><br>
multiport matching, both correlation and efficiency bandwidths decrease drastically at small antenna separations.},
  author       = {Lau, Buon Kiong and Bach Andersen, Jørgen and Kristensson, Gerhard and Molisch, Andreas},
  language     = {eng},
  title        = {On impedance matching and bandwidth of compact antenna arrays},
  year         = {2005},
}