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Tunable decoupling and matching network for diversity enhancement of closely spaced antennas

Tang, Xinyi, Mouthaan, Koenraad, & Coetzee, Jacob (2012) Tunable decoupling and matching network for diversity enhancement of closely spaced antennas. IEEE Antennas and Wireless Propagation Letters, 11, pp. 268-271.

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Abstract

A tunable decoupling and matching network (DMN) for a closely spaced two-element antenna array is presented. The DMN achieves perfect matching for the eigenmodes of the array and thus simultaneously isolates and matches the system ports while keeping the circuit small. Arrays of closely spaced wire and microstrip monopole pairs are used to demonstrate the proposed DMN. It is found that monopoles with different lengths can be used for the design frequency by using this DMN, which increases the design flexibility. This property also enables frequency tuning using the DMN only without having to change the length of the antennas. The proposed DMN uses only one varactor to achieve a tuning range of 18.8% with both return loss and isolation better than 10-dB when the spacing between the antenna is 0.05λ. When the spacing increases to 0.1λ, the simulated tuning range is more than 60%.

Impact and interest:

7 citations in Scopus
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6 citations in Web of Science®

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190 since deposited on 09 Feb 2012
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ID Code: 48528
Item Type: Journal Article
Keywords: antenna arrays, compact arrays, mutual coupling, antenna decoupling, antenna diversity, MIMO
DOI: 10.1109/LAWP.2012.2188773
ISSN: 1536-1225
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 2012 IEEE
Deposited On: 10 Feb 2012 08:36
Last Modified: 10 Jan 2013 00:06

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