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Paper Abstract and Keywords
Presentation 2022-11-15 14:30
Development of superconducting quad-band bandpass filter for a wideband receiver used in radio astronomy
Sota Rachi, Keita Sakuma (Yamanashi Univ.), Takuya Akahori (NAOJ), Naoto Sekiya (Yamanashi Univ.) MW2022-114
Abstract (in Japanese) (See Japanese page) 
(in English) Mizusawa VLBI Observatory of the National Astronomical Observatory of Japan are promoting the development of broadband receivers in the ultra-high frequency (UHF) band (0.7~2.1 GHz). However, continuous broadband radio observations in the UHF band are not possible due to the presence of radio frequency interferences (RFI). We have developed a superconducting quad-band bandpass filter (QB-BPF) at 0.7, 1.4, 1.6, and 2.1 GHz for wideband receivers. That consists of two dual-band bandpass filters. We have devised an interdigital feeding structure with a high degree of freedom in designing external quality factor. The measured and simulated results of the QB-BPF are in good agreement. We have successfully developed a QB-BPF that overcomes the problem of extensive RFI.
Keyword (in Japanese) (See Japanese page) 
(in English) high-temperature superconductor / quad-band bandpass filter / radio astronomy / / / / /  
Reference Info. IEICE Tech. Rep., vol. 122, no. 250, MW2022-114, pp. 31-36, Nov. 2022.
Paper # MW2022-114 
Date of Issue 2022-11-08 (MW) 
ISSN Online edition: ISSN 2432-6380
Copyright
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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)
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Conference Information
Committee MW  
Conference Date 2022-11-15 - 2022-11-16 
Place (in Japanese) (See Japanese page) 
Place (in English) Fukue-Bunka-Kaikan 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave, etc. 
Paper Information
Registration To MW 
Conference Code 2022-11-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Development of superconducting quad-band bandpass filter for a wideband receiver used in radio astronomy 
Sub Title (in English)  
Keyword(1) high-temperature superconductor  
Keyword(2) quad-band bandpass filter  
Keyword(3) radio astronomy  
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1st Author's Name Sota Rachi  
1st Author's Affiliation Yamanashi University (Yamanashi Univ.)
2nd Author's Name Keita Sakuma  
2nd Author's Affiliation Yamanashi University (Yamanashi Univ.)
3rd Author's Name Takuya Akahori  
3rd Author's Affiliation National Astronomical Observatory of Japan (NAOJ)
4th Author's Name Naoto Sekiya  
4th Author's Affiliation Yamanashi University (Yamanashi Univ.)
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Date Time 2022-11-15 14:30:00 
Presentation Time 25 minutes 
Registration for MW 
Paper # MW2022-114 
Volume (vol) vol.122 
Number (no) no.250 
Page pp.31-36 
#Pages
Date of Issue 2022-11-08 (MW) 


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