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Paper Abstract and Keywords
Presentation 2014-10-17 09:45
A Consideration on Simple Decoupling Circuit without Three-dimensional Structure for MIMO Antennas
Masahiro Mori, Nobuyoshi Kikuma, Hiroshi Hirayama, Kunio Sakakibara (NIT) AP2014-120
Abstract (in Japanese) (See Japanese page) 
(in English) Recently, the MIMO (Multiple-Input Multiple-Output) technology has been introduced into the portable terminals corresponding to the increase of the demand for the high-speed communications.
On the other hand, it is difficult to arrange the antenna elements separating enough in a small equipment such as portable terminals.
Since the element spacing of the MIMO antennas is very narrow in that case, the performance of MIMO is degraded due to the increase of mutual coupling between antenna signals in the terminal.
For removing the strong mutual coupling, decoupling circuits have been proposed, and it has been shown that it is possible to achieve high radiation efficiency of the MIMO antennas.
However, the structures of the decoupling circuits are complicated and hence simplification of the circuits is required in order to implement MIMO antennas in the mobile terminals.
In this paper, we design and discuss the simple decoupling circuit without three-dimensional structures in a two-element array antenna.
In addition, we propose a simplified decoupling method for the three-element array antenna.
By computer simulation, we show that high channel capacity can be obtained by the array antenna with a narrow element spacing.
Keyword (in Japanese) (See Japanese page) 
(in English) MIMO / mutual coupling / decoupling / correlation coefficient / capacity / / /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 245, AP2014-120, pp. 67-72, Oct. 2014.
Paper # AP2014-120 
Date of Issue 2014-10-08 (AP) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
Download PDF AP2014-120

Conference Information
Committee AP WPT  
Conference Date 2014-10-15 - 2014-10-17 
Place (in Japanese) (See Japanese page) 
Place (in English) Hokkaido University, Clark Memorial Student Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Wireless Power Transfer, Antennas and Propagation 
Paper Information
Registration To AP 
Conference Code 2014-10-AP-WPT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Consideration on Simple Decoupling Circuit without Three-dimensional Structure for MIMO Antennas 
Sub Title (in English)  
Keyword(1) MIMO  
Keyword(2) mutual coupling  
Keyword(3) decoupling  
Keyword(4) correlation coefficient  
Keyword(5) capacity  
1st Author's Name Masahiro Mori  
1st Author's Affiliation Nagoya Institute of Technology (NIT)
2nd Author's Name Nobuyoshi Kikuma  
2nd Author's Affiliation Nagoya Institute of Technology (NIT)
3rd Author's Name Hiroshi Hirayama  
3rd Author's Affiliation Nagoya Institute of Technology (NIT)
4th Author's Name Kunio Sakakibara  
4th Author's Affiliation Nagoya Institute of Technology (NIT)
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Date Time 2014-10-17 09:45:00 
Presentation Time 25 
Registration for AP 
Paper # IEICE-AP2014-120 
Volume (vol) IEICE-114 
Number (no) no.245 
Page pp.67-72 
#Pages IEICE-6 
Date of Issue IEICE-AP-2014-10-08 

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