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Paper Abstract and Keywords
Presentation 2007-12-10 10:20
Advanced Low Power Long Distance RF-Tag Systems by Using Modulated Subcarrier Wave
Hitoshi Kitayoshi, Kunio Sawaya (Tohoku Univ.) SIS2007-47
Abstract (in Japanese) (See Japanese page) 
(in English) Novel semi-passive sensor RF-tags for a low power consumption and a long reading range are proposed. Tags are composed of a sensor, a wearable cavity-backed slot antenna, a resonant short stub circuit for boosting the rectified DC voltage and a pulse key detector for the wake up operation. Subcarrier multilevel phase shift keying (MPSK) is employed for continuous data communications and distance measurement, is proposed. Experimental study of fabricated semi-passive RF-tags, i.e., tags for distance measurement, tri-axial acceleration sensor and electrocardiographic monitor, is presented, in which 35 m range response can be achieved in the 3mW/MHz ARIB STD-T81 reader at 2.45 GHz band. Current requirements of battery in these tags are 10uA (20sps), 633uA (350sps) and 583uA (350sps), respectively, which are much smaller than conventional active RF-tags.
Keyword (in Japanese) (See Japanese page) 
(in English) RF-tag / low power consumption / wearable antenna / subcarrier MPSK / voltage step up circuit by resonant stub / pulse key detector / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 373, SIS2007-47, pp. 13-18, Dec. 2007.
Paper # SIS2007-47 
Date of Issue 2007-12-03 (SIS) 
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 SIS  
Conference Date 2007-12-10 - 2007-12-11 
Place (in Japanese) (See Japanese page) 
Place (in English)  
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Paper Information
Registration To SIS 
Conference Code 2007-12-SIS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Advanced Low Power Long Distance RF-Tag Systems by Using Modulated Subcarrier Wave 
Sub Title (in English)  
Keyword(1) RF-tag  
Keyword(2) low power consumption  
Keyword(3) wearable antenna  
Keyword(4) subcarrier MPSK  
Keyword(5) voltage step up circuit by resonant stub  
Keyword(6) pulse key detector  
1st Author's Name Hitoshi Kitayoshi  
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2nd Author's Name Kunio Sawaya  
2nd Author's Affiliation Tohoku University (Tohoku Univ.)
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Date Time 2007-12-10 10:20:00 
Presentation Time 40 
Registration for SIS 
Paper # IEICE-SIS2007-47 
Volume (vol) IEICE-107 
Number (no) no.373 
Page pp.13-18 
#Pages IEICE-6 
Date of Issue IEICE-SIS-2007-12-03 

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