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Paper Abstract and Keywords
Presentation 2025-12-04 15:10
[Poster Presentation] Fundamental Study on Backscatter Human Body Communication in Implantable Environment -- Evaluation of Impedance Modulation Using Abdominal Implantable Tag --
Miyu Kodama, Dairoku Muramatsu (UEC) MICT2025-33 MI2025-41
Abstract (in Japanese) (See Japanese page) 
(in English) In implantable healthcare systems, sensors are implanted in the human body to collect data and transmit it to external devices. Therefore, continuous operation and reduced charging frequency are directly linked to system reliability. However, implantable sensors must be small and lightweight, which limits battery capacity. To address this issue, we have proposed a backscatter human body communication technique that combines human body communication with the backscatter method used in passive RFID systems. This approach enables battery-free data transmission by modulating and reflecting radio waves radiated by a reader. In this study, we focus on backscatter human body communication between an implantable tag embedded in the abdomen and an external reader. We evaluated whether impedance switching in the implanted tag can enable impedance modulation. The results of electromagnetic field analysis using a numerical human body model indicated that the reader was able to reliably detect impedance variations of the tag even through biological tissues. This finding confirms the feasibility of realizing backscatter communication between implanted and external devices based on impedance modulation.
Keyword (in Japanese) (See Japanese page) 
(in English) Implantable sensor / Backscatter communication / Human body communication / Impedance modulation / Electromagnetic field analysis / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 269, MICT2025-33, pp. 12-12, Dec. 2025.
Paper # MICT2025-33 
Date of Issue 2025-11-27 (MICT, MI) 
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 MICT2025-33 MI2025-41

Conference Information
Committee MICT MI  
Conference Date 2025-12-04 - 2025-12-05 
Place (in Japanese) (See Japanese page) 
Place (in English) Okayama Convention Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Medical imaging technology, healthcare and medical information communication technology, etc. 
Paper Information
Registration To MICT 
Conference Code 2025-12-MICT-MI 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Fundamental Study on Backscatter Human Body Communication in Implantable Environment 
Sub Title (in English) Evaluation of Impedance Modulation Using Abdominal Implantable Tag 
Keyword(1) Implantable sensor  
Keyword(2) Backscatter communication  
Keyword(3) Human body communication  
Keyword(4) Impedance modulation  
Keyword(5) Electromagnetic field analysis  
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1st Author's Name Miyu Kodama  
1st Author's Affiliation The University of Electro-Communications (UEC)
2nd Author's Name Dairoku Muramatsu  
2nd Author's Affiliation The University of Electro-Communications (UEC)
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Speaker Author-1 
Date Time 2025-12-04 15:10:00 
Presentation Time 80 minutes 
Registration for MICT 
Paper # MICT2025-33, MI2025-41 
Volume (vol) vol.125 
Number (no) no.269(MICT), no.270(MI) 
Page p.12 
#Pages 1 
Date of Issue 2025-11-27 (MICT, MI) 

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