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Mutual coupling analysis of a dual circularly polarised contrawound quadrifilar helix antenna (CQHA) in land mobile satellite (LMS) MIMO systems

Mansor, MF, Brown, TWC and Evans, BG (2009) Mutual coupling analysis of a dual circularly polarised contrawound quadrifilar helix antenna (CQHA) in land mobile satellite (LMS) MIMO systems In: 27th IET and AIAA International Communications Satellite Systems Conference (ICSSC 2009), 2009-06-01 - 2009-06-04, Edinburgh.

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Abstract

Analysis of the mutual coupling and its effect on the CQHA performance in LMS MIMO system are investigated and presented in this paper. Due to the complexity of the CQHA structure, the mutual coupling effects were mainly studied using electromagnetic simulation. The effect of the separation spacing between inner and outer QHA on the mutual coupling was investigated by comparing the element isolation of CQHAs with varying outer QHA radius and fixed inner QHA radius. It can be concluded that a minimum separation of 0.1 is required for the isolation to be better than 15dB. The distortion of the co-polar and cross-polar radiation patterns of the CQHA due to the mutual coupling are also studied in this paper. Finally, the effect of the mutual coupling on the mean effective gain and polarisation correlation of CQHAs with varying separation spacing between inner and outer QHA were examined and its results showed that the MEG values are very much affected by mutual coupling while the polarisation and angular correlation are largely unaffected.

Item Type: Conference or Workshop Item (Paper)
Additional Information: This paper is a postprint of a paper submitted to and accepted for publication in IET Conference Publications and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at IET Digital Library.
Divisions: Faculty of Engineering and Physical Sciences > Electronic Engineering > Centre for Communication Systems Research
Depositing User: Symplectic Elements
Date Deposited: 01 May 2012 13:22
Last Modified: 23 Sep 2013 19:22
URI: http://epubs.surrey.ac.uk/id/eprint/427914

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