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Paper Abstract and Keywords
Presentation 2008-12-11 13:30
[Poster Presentation] On-Chip S-Shaped Rat-Race Balun for Millimeter-Wave Band Using W-CSP Process
Yasuo Manzawa, Chiaki Inui, Minoru Fujishima (Tokyo Univ) ICD2008-106
Abstract (in Japanese) (See Japanese page) 
(in English) In millimeter-wave CMOS circuits, a balun is useful for connecting off-chip single-end devices and on-chip differential circuits to improve noise immunity. However, an on-chip balun occupies large chip area. To reduce the chip area required for the on-chip balun, a new rat-race balun using rewiring technology with a wafer-level chip-size package (W-CSP) is proposed. The W-CSP balun occupies no area in a die because it is placed over integrated circuits. In the proposed balun, an S-shaped structure is adopted in order to directly connect the balun to differential GSGSG pads on a chip with small area. The S-shaped W-CSP balun was fabricated on a silicon-on-insulator (SOI) substrate. The core area of the S-shaped rat-race balun is 480µm × 735µm, which is 22.4% that of a square rat-race balun. As a result of measurement, we found that the minimum insertion loss is 1.7dB and the operating frequency range is 40 to 61GHz.
Keyword (in Japanese) (See Japanese page) 
(in English) W-CSP / balun / millimeter-wave / rat-race / CMOS / / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 347, ICD2008-106, pp. 31-35, Dec. 2008.
Paper # ICD2008-106 
Date of Issue 2008-12-04 (ICD) 
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 ICD  
Conference Date 2008-12-11 - 2008-12-12 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokyo Inst. Tech., Ohokayama Campus, Kokusa-Kouryu-Kaikan 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Workshop for Graduate Student and Young Researchers 
Paper Information
Registration To ICD 
Conference Code 2008-12-ICD 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) On-Chip S-Shaped Rat-Race Balun for Millimeter-Wave Band Using W-CSP Process 
Sub Title (in English)  
Keyword(1) W-CSP  
Keyword(2) balun  
Keyword(3) millimeter-wave  
Keyword(4) rat-race  
Keyword(5) CMOS  
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Keyword(8)  
1st Author's Name Yasuo Manzawa  
1st Author's Affiliation University of Tokyo (Tokyo Univ)
2nd Author's Name Chiaki Inui  
2nd Author's Affiliation University of Tokyo (Tokyo Univ)
3rd Author's Name Minoru Fujishima  
3rd Author's Affiliation University of Tokyo (Tokyo Univ)
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Speaker Author-1 
Date Time 2008-12-11 13:30:00 
Presentation Time 165 minutes 
Registration for ICD 
Paper # ICD2008-106 
Volume (vol) vol.108 
Number (no) no.347 
Page pp.31-35 
#Pages 5 
Date of Issue 2008-12-04 (ICD) 

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