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Paper Abstract and Keywords
Presentation 2021-05-20 14:55
A Trial Manufacture of an Area-Efficient Distributed Amplifier Using Pseudo-Fractal Bended Transmission Lines
Keisuke Kawahara, Yohtaro Umeda, Kyoya Takano (TUS), Shinsuke Hara (NICT) MW2021-9
Abstract (in Japanese) (See Japanese page) 
(in English) In recent years, communication traffic has been increasing. Distributed amplifiers have been reported to a bandwidth of over 100 GHz, making them suitable for fiber-optic communications and terahertz-band wireless transceivers. However, distributed amplifiers require a large area because they use many inductors or transmission lines. In this study, we fabricated a distributed amplifier with improved area efficiency by bending the transmission line into a pseudo-fractal shape. The measurement results show that the proposed circuit has a bandwidth of 47 GHz at the maximum gain setting with a core area of 0.12 square millimeter. On the other hand, there was a discrepancy between the measured and simulated frequency responses. In this paper, the causes of the discrepancy are discussed, and countermeasures are investigated.
Keyword (in Japanese) (See Japanese page) 
(in English) Distributed amplifiers / CMOS integrated circuits / Fiber-optic communications / Terahertz transceivers / / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 31, MW2021-9, pp. 22-27, May 2021.
Paper # MW2021-9 
Date of Issue 2021-05-13 (MW) 
ISSN 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 MW2021-9

Conference Information
Committee MW  
Conference Date 2021-05-20 - 2021-05-20 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave, etc. 
Paper Information
Registration To MW 
Conference Code 2021-05-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Trial Manufacture of an Area-Efficient Distributed Amplifier Using Pseudo-Fractal Bended Transmission Lines 
Sub Title (in English)  
Keyword(1) Distributed amplifiers  
Keyword(2) CMOS integrated circuits  
Keyword(3) Fiber-optic communications  
Keyword(4) Terahertz transceivers  
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Keyword(6)  
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1st Author's Name Keisuke Kawahara  
1st Author's Affiliation Tokyo University of Science (TUS)
2nd Author's Name Yohtaro Umeda  
2nd Author's Affiliation Tokyo University of Science (TUS)
3rd Author's Name Kyoya Takano  
3rd Author's Affiliation Tokyo University of Science (TUS)
4th Author's Name Shinsuke Hara  
4th Author's Affiliation National Institute of Information and Communications Technology (NICT)
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Speaker Author-1 
Date Time 2021-05-20 14:55:00 
Presentation Time 25 minutes 
Registration for MW 
Paper # MW2021-9 
Volume (vol) vol.121 
Number (no) no.31 
Page pp.22-27 
#Pages 6 
Date of Issue 2021-05-13 (MW) 

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