Please use this identifier to cite or link to this item: https://doi.org/10.1109/LAWP.2012.2188773
Title: Tunable decoupling and matching network for diversity enhancement of closely spaced antennas
Authors: Tang, X. 
Mouthaan, K. 
Coetzee, J.C.
Keywords: Antenna array
antenna decoupling
antenna diversity
compact array
multiple-input-multiple-output (MIMO)
mutual coupling
Issue Date: 2012
Source: Tang, X., Mouthaan, K., Coetzee, J.C. (2012). Tunable decoupling and matching network for diversity enhancement of closely spaced antennas. IEEE Antennas and Wireless Propagation Letters 11 : 268-271. ScholarBank@NUS Repository. https://doi.org/10.1109/LAWP.2012.2188773
Abstract: A tunable decoupling and matching network (DMN) for a two-element closely spaced 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 antennas is 0.05 λ. When the spacing increases to 0.1 λ, and the antennas are properly matched, the simulated tuning range is more than 60%. © 2006 IEEE.
Source Title: IEEE Antennas and Wireless Propagation Letters
URI: http://scholarbank.nus.edu.sg/handle/10635/57714
ISSN: 15361225
DOI: 10.1109/LAWP.2012.2188773
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