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Paper Abstract and Keywords
Presentation 2016-05-19 15:25
A Directivity Enhancement for Directional Couplers Using Three-Conductor Coupled Lines
Hidehar Yoshioka, Akimichi Hirota, Hidenori Ishibashi, Naofumi Yoneda, Moriyasu Miyazaki (Mitsubishi) MW2016-10
Abstract (in Japanese) (See Japanese page) 
(in English) In a coupled-line directional coupler formed on thin multi-layered substrates, it is difficult to match coupled-line characteristic impedance (ZC) with load impedance (ZL). This impedance mismatching causes a forward coupling in the directional coupler, which results in degradation of the directivity.
In this study, we have proposed a new method for improving the directivity of the coupled-line directional couplers with the impedance mismatching. The method utilizes a reverse-phase forward coupling by an additional coupled line that is configured as part of three-conductor coupled lines to cancel the undesired forward coupling. It has been experimentally verified that the proposed directional coupler has directivity enhancement of 8.2 dB at 0.84 GHz compared with the conventional directional coupler.
Keyword (in Japanese) (See Japanese page) 
(in English) Directional coupler / Directivity / Forward coupling / Multi-layered substrate / / / /  
Reference Info. IEICE Tech. Rep., vol. 116, no. 51, MW2016-10, pp. 7-10, May 2016.
Paper # MW2016-10 
Date of Issue 2016-05-12 (MW) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF MW2016-10

Conference Information
Committee MW  
Conference Date 2016-05-19 - 2016-05-20 
Place (in Japanese) (See Japanese page) 
Place (in English) Kyoto Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave Technologies 
Paper Information
Registration To MW 
Conference Code 2016-05-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Directivity Enhancement for Directional Couplers Using Three-Conductor Coupled Lines 
Sub Title (in English)  
Keyword(1) Directional coupler  
Keyword(2) Directivity  
Keyword(3) Forward coupling  
Keyword(4) Multi-layered substrate  
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Keyword(6)  
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1st Author's Name Hidehar Yoshioka  
1st Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi)
2nd Author's Name Akimichi Hirota  
2nd Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi)
3rd Author's Name Hidenori Ishibashi  
3rd Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi)
4th Author's Name Naofumi Yoneda  
4th Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi)
5th Author's Name Moriyasu Miyazaki  
5th Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi)
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Speaker Author-1 
Date Time 2016-05-19 15:25:00 
Presentation Time 25 minutes 
Registration for MW 
Paper # MW2016-10 
Volume (vol) vol.116 
Number (no) no.51 
Page pp.7-10 
#Pages 4 
Date of Issue 2016-05-12 (MW) 

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