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Paper Abstract and Keywords
Presentation 2021-02-19 11:35
The Effects of the FDTD Modeling Structure on the Simulated Radiation Characteristics of Electromagnetically Coupled Embroidered Patch Antennas
Daiki Ichikawa, Hiroki Fujiyama, Tadahiko Maeda (Ritsumeikan Univ.) AP2020-124
Abstract (in Japanese) (See Japanese page) 
(in English) Embroidered wearable antennas composed of conductive yarns are inherently conformal, light-weight, and flexible and therefore easy to incorporate into conventional apparel using standard fabrication techniques with a computerized sewing machine. The high reproducibility of the electromagnetically coupled patch antennas embroidered with a conventional computerized sewing machine has been reported experimentally in terms of the resonance frequency, bandwidth, and gain. It is necessary to optimize the embroidery antenna structure that maintains the required radiation characteristics and mechanical flexibility of embroidery antennas with less conductive yarns. In the simulation of embroidered antennas composed of conductive yarns, the electrical connection characteristics between adjacent conductive yarns are unclear depending upon the embroidery density. In short, it is difficult to accurately model the adjacent-connection structure of embroidered antennas in the FDTD simulation. In this paper, a simulation method focusing on the embroidery density is proposed and assessed to simulate the electromagnetically coupled wearable patch antennas fabricated with conductive yarns. In Simulating embroidered antennas with high stitch density, the modeling method with changing the conductivity was introduced, and for those with low stitch density, the modeling method of simulating the 3D-embroidery structure. Finally, we have confirmed that by changing the modeling method to match the stitch density, the simulated results showed the same trend as the actual measured results.
Keyword (in Japanese) (See Japanese page) 
(in English) Conductive yarn / Electromagnetically coupled patch antennas / Embroidery structure / Embroidery density / FDTD method / / /  
Reference Info. IEICE Tech. Rep., vol. 120, no. 373, AP2020-124, pp. 46-49, Feb. 2021.
Paper # AP2020-124 
Date of Issue 2021-02-11 (AP) 
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 AP2020-124

Conference Information
Committee AP  
Conference Date 2021-02-18 - 2021-02-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Industrial Session, Antennas and Propagation 
Paper Information
Registration To AP 
Conference Code 2021-02-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) The Effects of the FDTD Modeling Structure on the Simulated Radiation Characteristics of Electromagnetically Coupled Embroidered Patch Antennas 
Sub Title (in English)  
Keyword(1) Conductive yarn  
Keyword(2) Electromagnetically coupled patch antennas  
Keyword(3) Embroidery structure  
Keyword(4) Embroidery density  
Keyword(5) FDTD method  
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Keyword(7)  
Keyword(8)  
1st Author's Name Daiki Ichikawa  
1st Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
2nd Author's Name Hiroki Fujiyama  
2nd Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
3rd Author's Name Tadahiko Maeda  
3rd Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
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Speaker Author-1 
Date Time 2021-02-19 11:35:00 
Presentation Time 25 minutes 
Registration for AP 
Paper # AP2020-124 
Volume (vol) vol.120 
Number (no) no.373 
Page pp.46-49 
#Pages 4 
Date of Issue 2021-02-11 (AP) 

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