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Paper Abstract and Keywords
Presentation 2016-12-15 16:40
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) MW2016-150 Link to ES Tech. Rep. Archives: MW2016-150
Abstract (in Japanese) (See Japanese page) 
(in English) It has been reported that the composite made of sendust (Fe-Si-Al) particles dispersed in polystyrene resin can be used as an broadband electromagnetic absorber in the frequency range above several GHz. In order to broaden the absorption frequency bandwidth, it is important that the non- reflective condition is satisfied in the desired frequency range in designing an absorber. The maximum normalized −20 dB absorption bandwidth for the composite containing the spherical sendust particles with average particle size of 3.5 μm was approximately 29 % for the volume ratio of sendust particle of ≈ 20 vol%, which was much larger than that of commercially available absorbers (less than approximately 10 %). In order to commercialize the composites absorbers made of sendust particle dispersed in polystyrene resin, it is necessary to improved absorption bandwidth furthermore. In this study, in order to improve the absorption frequency bandwidth, the double-layered electromagnetic wave absorbers,which operate in the frequency range between 2.5‒18 GHz. The frequency dependence of return loss was calculated using the values of the complex relative permeability and the complex relative permittivity. Measured values of return loss agreed with the calculated value.
Keyword (in Japanese) (See Japanese page) 
(in English) Double Layered Electromagnetic Wave Absorbers / Wide band Absorption / Sendust Particles / polystyrene resin / Return Loss / / /  
Reference Info. IEICE Tech. Rep., vol. 116, no. 363, MW2016-150, pp. 101-106, Dec. 2016.
Paper # MW2016-150 
Date of Issue 2016-12-08 (MW) 
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 MW2016-150 Link to ES Tech. Rep. Archives: MW2016-150

Conference Information
Committee MW  
Conference Date 2016-12-15 - 2016-12-16 
Place (in Japanese) (See Japanese page) 
Place (in English) National Defense Academy 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Students Session / Microwave Technologies 
Paper Information
Registration To MW 
Conference Code 2016-12-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) Double Layered Electromagnetic Wave Absorbers  
Keyword(2) Wide band Absorption  
Keyword(3) Sendust Particles  
Keyword(4) polystyrene resin  
Keyword(5) Return Loss  
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Keyword(8)  
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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Speaker
Date Time 2016-12-15 16:40:00 
Presentation Time 20 
Registration for MW 
Paper # IEICE-MW2016-150 
Volume (vol) IEICE-116 
Number (no) no.363 
Page pp.101-106 
#Pages IEICE-6 
Date of Issue IEICE-MW-2016-12-08 


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