Periodic Reactance Time Functions for 2-Element ESPAR Antennas Applied to 2-Output SIMO/MIMO Receivers

Kosei KAWANO  Masato SAITO  

Publication
IEICE TRANSACTIONS on Communications   Vol.E102-B   No.4   pp.930-939
Publication Date: 2019/04/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2018EBP3097
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
Keyword: 
SIMO receiver,  MIMO receiver,  receive diversity,  ESPAR antenna,  reactance time function,  antenna pattern,  

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Summary: 
In this paper, we propose a periodic reactance time function for 2-element electronically steerable passive array radiator (ESPAR) antennas applicable to the receivers of both single-input multiple-output (SIMO) and multiple-input multiple-output (MIMO) systems with 2 outputs. Based on the proposed function, we evaluate the power patterns of the antenna for various distances between two antenna elements. Moreover, for the distances, we discuss the correlation properties and the strength of the two outputs to find the appropriate distance for the receiver. From the discussions, we can conclude that distances from 0.1 to 0.35 times the wavelength are effective in terms of receive diversity.