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Paper Abstract and Keywords
Presentation 2016-05-20 13:50
Study on Evaluation of Composite Electromagnetic Wave Absorbers with Two-layers Structure made of Sendust Partcle Dispersed in Polystyrene Resin
Seiki Umemoto, Takumi Kubota, Takahiko Yoshida, Yuki Satou, Shinzo Yoshikado (Doshisha Univ.) MW2016-23 Link to ES Tech. Rep. Archives: MW2016-23
Abstract (in Japanese) (See Japanese page) 
(in English) The development of an electromagnetic wave absorber suitable for these new devices is required, especially at frequencies above several GHz. In the previous study, we have reported that the composite made of sendust (Fe-Si-Al) and polystyrene resin can be used as an broadband absorber at frequencies above several GHz. To broaden the absorption frequency bandwidth, it is important to ascertain that the non- reflective condition is satisfied in the desired frequency range when designing an absorber. The maximum normalized −20 dB absorption bandwidth for the composite containing the spherical sendust particles with average 3.5-μm particle size was approximately 29% for V ≈ 20 vol%, which is much larger than that of a commercially available absorber (less than approximately 10%)..In order to commercialize the composites made of sendust particle dispersed in polystyrene resin, it is necessary to improved absorption bandwidth. In this study, to improve the absorption frequency bandwidth, the two-layered electromagnetic wave absorber is designed in the frequency range up to 2.5-18GHz. Frequency characteristics of the return loss were calculated from the value of the complex relative permeability μr * and the complex relative permittivity εr *.A comparison was made of the actual measured value and the calculated value . As a result , consistent trend was confirmed .
Keyword (in Japanese) (See Japanese page) 
(in English) Electromagnetic Wave Absorber / Sendust particle / Return Loss / / / / /  
Reference Info. IEICE Tech. Rep., vol. 116, no. 51, MW2016-23, pp. 67-71, May 2016.
Paper # MW2016-23 
Date of Issue 2016-05-12 (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)
Download PDF MW2016-23 Link to ES Tech. Rep. Archives: MW2016-23

Conference Information
Committee MW  
Conference Date 2016-05-19 - 2016-05-20 
Place (in Japanese) (See Japanese page) 
Place (in English) Kyoto Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave Technologies 
Paper Information
Registration To MW 
Conference Code 2016-05-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Study on Evaluation of Composite Electromagnetic Wave Absorbers with Two-layers Structure made of Sendust Partcle Dispersed in Polystyrene Resin 
Sub Title (in English)  
Keyword(1) Electromagnetic Wave Absorber  
Keyword(2) Sendust particle  
Keyword(3) Return Loss  
1st Author's Name Seiki Umemoto  
1st Author's Affiliation Doshisha University (Doshisha Univ.)
2nd Author's Name Takumi Kubota  
2nd Author's Affiliation Doshisha University (Doshisha Univ.)
3rd Author's Name Takahiko Yoshida  
3rd Author's Affiliation Doshisha University (Doshisha Univ.)
4th Author's Name Yuki Satou  
4th Author's Affiliation Doshisha University (Doshisha Univ.)
5th Author's Name Shinzo Yoshikado  
5th Author's Affiliation Doshisha University (Doshisha Univ.)
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Date Time 2016-05-20 13:50:00 
Presentation Time 25 
Registration for MW 
Paper # IEICE-MW2016-23 
Volume (vol) IEICE-116 
Number (no) no.51 
Page pp.67-71 
#Pages IEICE-5 
Date of Issue IEICE-MW-2016-05-12 

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