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Paper Abstract and Keywords
Presentation 2020-03-05 10:55
Inductor-less Active Directional Coupler
Takanobu Fujiwara, Tatsuya Hagiwara, Masaomi Tsuru (MELCO) MW2019-141
Abstract (in Japanese) (See Japanese page) 
(in English) In order to miniturize the directional coupler, one of the best option is to use inductors and capacitors instead of coupling quater length transmission line. Nethertheless when the target frequency of directioal coupler gets lower, required inductance and/or capacitance become too large where it makes impossible to integrate all the components into small die area. This report proposes design and evaluation results of Inductor-less active directional coupler composed of resistor and voltage-mode amplifier instead of quater wave-length transmission line or inductors and capacitors. An active directional coupler was fabricated using 3.3V bulk-CMOS process. Its operating frequency ranges from DC to 100MHz. The fabricated chip size is small as 120um x 80um, and measured directivity was more than 61 dB at the frequency range from DC to 1MHz.
Keyword (in Japanese) (See Japanese page) 
(in English) Directional Coupler / Miniturization / / / / / /  
Reference Info. IEICE Tech. Rep., vol. 119, no. 459, MW2019-141, pp. 5-9, March 2020.
Paper # MW2019-141 
Date of Issue 2020-02-27 (MW) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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 2020-03-05 - 2020-03-06 
Place (in Japanese) (See Japanese page) 
Place (in English) Kochi City Culture-Plaza CUL=PORT 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave Technologies 
Paper Information
Registration To MW 
Conference Code 2020-03-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Inductor-less Active Directional Coupler 
Sub Title (in English)  
Keyword(1) Directional Coupler  
Keyword(2) Miniturization  
1st Author's Name Takanobu Fujiwara  
1st Author's Affiliation Mitsubishi Electric Corporation (MELCO)
2nd Author's Name Tatsuya Hagiwara  
2nd Author's Affiliation Mitsubishi Electric Corporation (MELCO)
3rd Author's Name Masaomi Tsuru  
3rd Author's Affiliation Mitsubishi Electric Corporation (MELCO)
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Date Time 2020-03-05 10:55:00 
Presentation Time 25 
Registration for MW 
Paper # IEICE-MW2019-141 
Volume (vol) IEICE-119 
Number (no) no.459 
Page pp.5-9 
#Pages IEICE-5 
Date of Issue IEICE-MW-2020-02-27 

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