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Paper Abstract and Keywords
Presentation 2012-12-13 16:15
Parallel-Ring-Type Rat-Race Circuit for Loose Coupling Utilizing Composite Right/Left-Handed Transmission Lines
Yuma Simitomo, Tadashi Kawai, Akira Enokihara, Isao Ohta (Univ. of Hyogo), Kei Satoh, Yasunori Suzuki, Hiroshi Okazaki, Shoichi Narahashi (NTT DOCOMO) MW2012-132
Abstract (in Japanese) (See Japanese page) 
(in English) This paper treats a parallel-ring-type rat-race circuit for loose coupling utilizing composite right-/left-handed transmission lines(CRLH-TLs). For conventional rat-race circuits maximum of unbalanced power ratio from two output ports is limited by characteristic impedance of one pair of ring-lines that can be manufactured. We have already proposed a parallel-ring-type rat-race circuit for loose coupling utilizing only RH-TLs and realized the rat-race circuit with a large unbalance power ratio. In this research, the proposed parallel-ring-type rat-race circuit utilizing CRLH-TLs can achieve broadband characteristics and compact circuit size with a coupling factor of -20dB. Furthermore, the validity of this design procedure has been demonstrated by em-simulations and experiments at 4GHz band.
Keyword (in Japanese) (See Japanese page) 
(in English) Microwave passive components / CRLH-TL / rat-race circuit / loose coupling / broadband / compact / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 355, MW2012-132, pp. 31-36, Dec. 2012.
Paper # MW2012-132 
Date of Issue 2012-12-06 (MW) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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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)
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Conference Information
Committee MW  
Conference Date 2012-12-13 - 2012-12-14 
Place (in Japanese) (See Japanese page) 
Place (in English) Univ. of Yamanashi 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave Technologies 
Paper Information
Registration To MW 
Conference Code 2012-12-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Parallel-Ring-Type Rat-Race Circuit for Loose Coupling Utilizing Composite Right/Left-Handed Transmission Lines 
Sub Title (in English)  
Keyword(1) Microwave passive components  
Keyword(2) CRLH-TL  
Keyword(3) rat-race circuit  
Keyword(4) loose coupling  
Keyword(5) broadband  
Keyword(6) compact  
Keyword(7)  
Keyword(8)  
1st Author's Name Yuma Simitomo  
1st Author's Affiliation University of Hyogo (Univ. of Hyogo)
2nd Author's Name Tadashi Kawai  
2nd Author's Affiliation University of Hyogo (Univ. of Hyogo)
3rd Author's Name Akira Enokihara  
3rd Author's Affiliation University of Hyogo (Univ. of Hyogo)
4th Author's Name Isao Ohta  
4th Author's Affiliation University of Hyogo (Univ. of Hyogo)
5th Author's Name Kei Satoh  
5th Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
6th Author's Name Yasunori Suzuki  
6th Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
7th Author's Name Hiroshi Okazaki  
7th Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
8th Author's Name Shoichi Narahashi  
8th Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
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Speaker Author-1 
Date Time 2012-12-13 16:15:00 
Presentation Time 30 minutes 
Registration for MW 
Paper # MW2012-132 
Volume (vol) vol.112 
Number (no) no.355 
Page pp.31-36 
#Pages 6 
Date of Issue 2012-12-06 (MW) 

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