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Paper Abstract and Keywords
Presentation 2007-04-27 15:20
A 5 GHz High-Temperature Superconducting reaction-type transmitting filter to suppress adjacent channel noises
Shunichi Futatsumori, Takashi Hikage, Toshio Nojima (Hokkaido Univ.), Akihiko Akasegawa, Teru Nakanishi, Kazunori Yamanaka (Fujitsu Ltd.) SCE2007-10 MW2007-10
Abstract (in Japanese) (See Japanese page) 
(in English) A 5 GHz High-Temperature Superconducting reaction-type transmitting filter (HTS-RTF) to suppress adjacent channel noise is newly proposed. Since reaction-type resonators do not resonate with high-power fundamental signals, an HTS-RTF enables both high-power handling capability and sharp cutoff characteristics compared to existing planar-type HTS transmitting filters. For practical applications in a 5 GHz band, however, it is required for resonators to achieve high-unloaded Q-factors and low radiations as well as low surface current densities in passband. Firstly, novel split open-ring resonators, which reduce maximum current densities while maintaining high-unloaded Q-factors, are proposed. The measured resonator shows unloaded Q-factor of 68,000 at 5 GHz and third intermodulation-distortion (IMD3) of –82 dBc at 30 dBm input power. Secondly, to investigate the feasibility of an HTS-RTF, a 5 GHz three-pole HTS-RTF with a fractional bandwidth of 0.03 % is designed.
Keyword (in Japanese) (See Japanese page) 
(in English) Reaction-type filter / High-Temperature Superconductor / Power-handling capability / Split open-ring resonator / / / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 28, MW2007-10, pp. 49-54, April 2007.
Paper # MW2007-10 
Date of Issue 2007-04-20 (SCE, 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 SCE2007-10 MW2007-10

Conference Information
Committee MW SCE  
Conference Date 2007-04-27 - 2007-04-27 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave Superconductivity, etc. 
Paper Information
Registration To MW 
Conference Code 2007-04-MW-SCE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A 5 GHz High-Temperature Superconducting reaction-type transmitting filter to suppress adjacent channel noises 
Sub Title (in English)  
Keyword(1) Reaction-type filter  
Keyword(2) High-Temperature Superconductor  
Keyword(3) Power-handling capability  
Keyword(4) Split open-ring resonator  
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1st Author's Name Shunichi Futatsumori  
1st Author's Affiliation Hokkaido University (Hokkaido Univ.)
2nd Author's Name Takashi Hikage  
2nd Author's Affiliation Hokkaido University (Hokkaido Univ.)
3rd Author's Name Toshio Nojima  
3rd Author's Affiliation Hokkaido University (Hokkaido Univ.)
4th Author's Name Akihiko Akasegawa  
4th Author's Affiliation Fujitsu Limited (Fujitsu Ltd.)
5th Author's Name Teru Nakanishi  
5th Author's Affiliation Fujitsu Limited (Fujitsu Ltd.)
6th Author's Name Kazunori Yamanaka  
6th Author's Affiliation Fujitsu Limited (Fujitsu Ltd.)
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Speaker Author-1 
Date Time 2007-04-27 15:20:00 
Presentation Time 25 minutes 
Registration for MW 
Paper # SCE2007-10, MW2007-10 
Volume (vol) vol.107 
Number (no) no.27(SCE), no.28(MW) 
Page pp.49-54 
#Pages 6 
Date of Issue 2007-04-20 (SCE, MW) 

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