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Paper Abstract and Keywords
Presentation 2019-11-15 10:20
On the Relationship between Direct Source/Load Coupling and Higher-order Resonances in Microwave Bandpass Filter
Masataka Ohira, Ryo Mikase, Zhewang Ma (Saitama Univ.) MW2019-113
Abstract (in Japanese) (See Japanese page) 
(in English) It is well known that a direct source/load coupling contributes to the generation of transmission zeros at stopbands in bandpass filters. The direct source/load coupling, as suggested by the name, represents the amount of coupling when the input port (line) and output port (line) are directly coupled, but we should note that it is not always the case. It is theoretically pointed out that higher-order resonances also contribute to the direct source/load coupling. However, such a physical mechanism has not been quantitatively evaluated yet. In this paper, it is clarified by quantitative evaluations with a coupling-matrix extraction technique that the direct source/load coupling and its sign are mainly determined by higher-order resonances of resonators in a microstrip bandpass filter, as an example.
Keyword (in Japanese) (See Japanese page) 
(in English) bandpass filter / direct source/load coupling / resonance / coupling matrix / / / /  
Reference Info. IEICE Tech. Rep., vol. 119, no. 292, MW2019-113, pp. 77-80, Nov. 2019.
Paper # MW2019-113 
Date of Issue 2019-11-07 (MW) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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 MW2019-113

Conference Information
Committee MW  
Conference Date 2019-11-14 - 2019-11-15 
Place (in Japanese) (See Japanese page) 
Place (in English) Minami Daido Villa. Tamokuteki Koryu Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave Technologies 
Paper Information
Registration To MW 
Conference Code 2019-11-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) On the Relationship between Direct Source/Load Coupling and Higher-order Resonances in Microwave Bandpass Filter 
Sub Title (in English)  
Keyword(1) bandpass filter  
Keyword(2) direct source/load coupling  
Keyword(3) resonance  
Keyword(4) coupling matrix  
1st Author's Name Masataka Ohira  
1st Author's Affiliation Saitama Univercity (Saitama Univ.)
2nd Author's Name Ryo Mikase  
2nd Author's Affiliation Saitama Univercity (Saitama Univ.)
3rd Author's Name Zhewang Ma  
3rd Author's Affiliation Saitama Univercity (Saitama Univ.)
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Date Time 2019-11-15 10:20:00 
Presentation Time 25 
Registration for MW 
Paper # IEICE-MW2019-113 
Volume (vol) IEICE-119 
Number (no) no.292 
Page pp.77-80 
#Pages IEICE-4 
Date of Issue IEICE-MW-2019-11-07 

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