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| Presentation | 2011-12-15 14:45 An Experimental Study on Multi-layered Wave Absorber Using Short Carbon Fibers Having Wideband Absorption Characteristics Shunki Kato, Takenori Yasuzumi, Osamu Hashimoto (Aoyama Gakuin Univ.), Toshiaki Tanaka (Matsuyama Keori CO., LTD.)  MW2011-128 Link to ES Tech. Rep. Archives: MW2011-128 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | In this paper, an experimental study on bandwidth expansion of multi-layered wave absorber using short carbon fiber is proposed. The absorber is composed of conductive short carbon fibers placed on a coplanar of the spacer and metal plate placed in the back. This could be analyzed as a $\lambda/4$ type equivalent circuit, consists of surface impedance having frequency characteristics. From the results, one-layer type could adjust the matching frequency and strength by the length of short carbon fibers and the thickness of the spacer. The optimized absorber had two matching frequencies and fractional bandwidth (FB) was 96.6%. Then measured and calculated absorption characteristics were compared by using the two-layered equivalent circuit. This circuit is composed of cascade connection of proposed circuit. The matching frequencies showed good agreement with measured result, but its FB was very narrow due to the perfect reflection point and this may be the effect of coupling. Then, the three-layered absorber was fabricated to improve the FB. As a result, the wave absorber having wide band characteristics was achieved, which had 164.7% of FB and increased absorption. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Short carbon fibers / multi-layered wave absorber / thin-type / wide band / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 111, no. 351, MW2011-128, pp. 15-20, Dec. 2011. | |
| Paper # | MW2011-128 | |
| Date of Issue | 2011-12-08 (MW) | |
| ISSN | Print edition: ISSN 0913-5685 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 | MW2011-128 Link to ES Tech. Rep. Archives: MW2011-128 |
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| Conference Information | |
| Committee | MW |
| Conference Date | 2011-12-15 - 2011-12-16 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Yamaguchi University |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Microwave Technologies |
| Paper Information | |
| Registration To | MW |
| Conference Code | 2011-12-MW |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | An Experimental Study on Multi-layered Wave Absorber Using Short Carbon Fibers Having Wideband Absorption Characteristics |
| Sub Title (in English) | |
| Keyword(1) | Short carbon fibers |
| Keyword(2) | multi-layered wave absorber |
| Keyword(3) | thin-type |
| Keyword(4) | wide band |
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| 1st Author's Name | Shunki Kato |
| 1st Author's Affiliation | Aoyama Gakuin University (Aoyama Gakuin Univ.) |
| 2nd Author's Name | Takenori Yasuzumi |
| 2nd Author's Affiliation | Aoyama Gakuin University (Aoyama Gakuin Univ.) |
| 3rd Author's Name | Osamu Hashimoto |
| 3rd Author's Affiliation | Aoyama Gakuin University (Aoyama Gakuin Univ.) |
| 4th Author's Name | Toshiaki Tanaka |
| 4th Author's Affiliation | Matsuyama Keori Company Limited (Matsuyama Keori CO., LTD.) |
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| Speaker | Author-1 |
| Date Time | 2011-12-15 14:45:00 |
| Presentation Time | 30 minutes |
| Registration for | MW |
| Paper # | MW2011-128 |
| Volume (vol) | vol.111 |
| Number (no) | no.351 |
| Page | pp.15-20 |
| #Pages | 6 |
| Date of Issue | 2011-12-08 (MW) |
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