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Paper Abstract and Keywords
Presentation 2016-11-24 11:10
Radiation Characteristics of Embroidered Wideband Wearable Antennas Using Different Sewing Patterns
Takayuki Yoshikawa, Tadahiko Maeda (Ritsumeikan Univ.) AP2016-109
Abstract (in Japanese) (See Japanese page) 
(in English) When textile antennas are embedded into the clothes, the sewing pattern of radiating elements affects the plasticity, flexibility and texture of the embroidered antenna as well as the radiation characteristics of the antenna. Embroidered antennas are commonly fabricated by using flexible conductive yarns whose conductivities are
smaller than that of copper wires. In assessing the radiation efficiency of embroidered conductive yarn wearable
antennas, which are commonly used in the vicinity of a human body, it is important to assess the following two
types of loss: 1) The loss caused by a human body, and 2) The loss caused by a conductive yarn. Previous studies
show that the simplest modification using lower conductivity for the radiating element during the FDTD simulation
cannot explain the measurement results. This paper proposes a modified simulation method for the embroidered wideband oval slot antennas in order to predict the radiation efficiencies of the antennas with the FDTD simulation.The measured results for the radiation efficiencies of several wideband oval slot antennas, which have different sewing patterns, agree well with the simulated results by using two different conductivities for the radiating element based on the sewing direction in the embroidered structures.
Keyword (in Japanese) (See Japanese page) 
(in English) Wideband wearable antenna / Conductive yarn / Radiation efficiency / Conductivity / Sewing structure / FDTD / /  
Reference Info. IEICE Tech. Rep., vol. 116, no. 317, AP2016-109, pp. 11-16, Nov. 2016.
Paper # AP2016-109 
Date of Issue 2016-11-17 (AP) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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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 AP2016-109

Conference Information
Committee RCS AP  
Conference Date 2016-11-24 - 2016-11-25 
Place (in Japanese) (See Japanese page) 
Place (in English) Kyoto International Community House 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Adaptive Antenna, Equalization, Interference Canceler, MIMO, Wireless Communications, etc. 
Paper Information
Registration To AP 
Conference Code 2016-11-RCS-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Radiation Characteristics of Embroidered Wideband Wearable Antennas Using Different Sewing Patterns 
Sub Title (in English)  
Keyword(1) Wideband wearable antenna  
Keyword(2) Conductive yarn  
Keyword(3) Radiation efficiency  
Keyword(4) Conductivity  
Keyword(5) Sewing structure  
Keyword(6) FDTD  
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Keyword(8)  
1st Author's Name Takayuki Yoshikawa  
1st Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
2nd Author's Name Tadahiko Maeda  
2nd Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
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Date Time 2016-11-24 11:10:00 
Presentation Time 25 minutes 
Registration for AP 
Paper # AP2016-109 
Volume (vol) vol.116 
Number (no) no.317 
Page pp.11-16 
#Pages
Date of Issue 2016-11-17 (AP) 


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