Performance enhancement of smart antennas with reduced element spacing

Chaloupka, Heinz J, Wang, Xin, & Coetzee, Jacob (2003) Performance enhancement of smart antennas with reduced element spacing. In IEEE Wireless Communications and Networking Conference Proceedings, IEEE, New Orleans, LA, pp. 425-430.

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This paper addresses the problem of degradations in adaptive digital beam-forming (DBF) systems caused by mutual coupling between array elements. The focus is on compact arrays with reduced element spacing and, hence, strongly coupled elements. Deviations in the radiation patterns of coupled and (theoretically) uncoupled elements can be compensated for by weight-adjustments in DBF, but SNR degradation due to impedance mismatches cannot be compensated for via signal processing techniques. It is shown that this problem can be overcome via the implementation of a RF-decoupling-network. SNR enhancement is achieved at the cost of a reduced frequency bandwidth and an increased sensitivity to dissipative losses in the antenna and matching network structure.

Impact and interest:

32 citations in Scopus
10 citations in Web of Science®
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ID Code: 48966
Item Type: Conference Paper
Refereed: Yes
Keywords: adaptive beamforming, smart antennas, mutual coupling
DOI: 10.1109/WCNC.2003.1200387
ISBN: 0780377001
ISSN: 1525-3511
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ELECTRICAL AND ELECTRONIC ENGINEERING (090600) > Electrical and Electronic Engineering not elsewhere classified (090699)
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2003 IEEE
Copyright Statement: This work has been submitted to the IEEE for possible publication. Copyright may be transferred without notice, after which this version may no longer be accessible
Deposited On: 04 Mar 2012 22:41
Last Modified: 05 Mar 2012 04:21

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