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Paper Abstract and Keywords
Presentation 2015-05-29 16:50
Design of Microstrip Bandpass Filter with Transmission Zeros Using Half-wavelength Resonator Transversal Array
Toshiki Kato, Masataka Ohira, Zhewang Ma (Saitama Univ.) MW2015-37 Link to ES Tech. Rep. Archives: MW2015-37
Abstract (in Japanese) (See Japanese page) 
(in English) We have reported a new design method for multi-mode bandpass filters with transmission zeros (TZs) based on a synthesis theory of transversal array filters. However, there is a problem that external Q factors of multiple resonances are very hard to control independently, since multiple resonant modes are excited with a single feeding line. This paper proposes a new and simple structure of microstrip bandpass filter having TZs, which is constructed by the parallel arrangement of even- and odd-mode microstrip half-wavelength resonators. This filter structure makes it possible to easily control the external Q factor of each resonator, thereby generating TZs at arbitrary finite frequency positions with the control of external Q factors without using any non-adjacent couplings. As an example, we design a bandpass filter with 2-GHz center frequency, 6% bandwidth in passband, and four TZs located very near the passband, resulting in very high skirt selectivity. Finally, the validity of the pro-posed structure is verified by the comparison between the simulated and measured results.
Keyword (in Japanese) (See Japanese page) 
(in English) Bandpass filters / transversal array filters / transmission zeros / even- and odd-mode resonances / / / /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 66, MW2015-37, pp. 93-98, May 2015.
Paper # MW2015-37 
Date of Issue 2015-05-21 (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 MW2015-37 Link to ES Tech. Rep. Archives: MW2015-37

Conference Information
Committee MW  
Conference Date 2015-05-28 - 2015-05-29 
Place (in Japanese) (See Japanese page) 
Place (in English) The Univ. of Electro-Commun. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave Technologies 
Paper Information
Registration To MW 
Conference Code 2015-05-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Design of Microstrip Bandpass Filter with Transmission Zeros Using Half-wavelength Resonator Transversal Array 
Sub Title (in English)  
Keyword(1) Bandpass filters  
Keyword(2) transversal array filters  
Keyword(3) transmission zeros  
Keyword(4) even- and odd-mode resonances  
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1st Author's Name Toshiki Kato  
1st Author's Affiliation Saitama University (Saitama Univ.)
2nd Author's Name Masataka Ohira  
2nd Author's Affiliation Saitama University (Saitama Univ.)
3rd Author's Name Zhewang Ma  
3rd Author's Affiliation Saitama University (Saitama Univ.)
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Speaker Author-1 
Date Time 2015-05-29 16:50:00 
Presentation Time 30 minutes 
Registration for MW 
Paper # MW2015-37 
Volume (vol) vol.115 
Number (no) no.66 
Page pp.93-98 
#Pages
Date of Issue 2015-05-21 (MW) 


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