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.
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.
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|Item Type:||Conference Paper|
|Keywords:||adaptive beamforming, smart antennas, mutual coupling|
|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:||05 Mar 2012 08:41|
|Last Modified:||05 Mar 2012 14:21|
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