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Paper Abstract and Keywords
Presentation 2009-05-28 15:25
Synthesis/Design of Novel Ultra-Wideband Bandpass Filter Using Open-Ended Stub Loaded Parallel Coupled Three-Line Unit
Chun-Ping Chen, Yoshinori Takakura, Hiroshige Nihei (Kanagawa Univ.), Zhewang Ma (Saitama Univ.), Tetsuo Anada (Kanagawa Univ.) MW2009-16
Abstract (in Japanese) (See Japanese page) 
(in English) The purpose of this paper is to propose an effective design scheme to implement compact, high-performance wideband bandpass filters by using the stub-loaded short-circuited parallel-coupled three-line units. An simulative investigation was conducted on the transmission characteristics of the new coupling unit to show that the bandwidth of such structure can be equivalent by a symmetric parallel-coupled short-circuited three-line unit, whereas the transmission zeros can be predicted by a two-section stub consisting of the loaded stub and one of the parallel-coupled three lines. Accordingly, given the specifications, the filter can be designed by two steps: 1. in terms of a recently proposed ultra-wideband (UWB) filter synthesis technique, a Chebyshev filter is first synthesized on the desired passband, using symmetric three-line coupling units. 2. By designing the stubs, transmission zeros are then introduced to improve the skirt and stopband characteristics. As an example, a UWB bandpass filter covering the Japan’s lower UWB band (BW: 3.1-4.8GHz, FBW: 43%) is designed to explain the proposed design procedure. The measured filtering characteristics agree well with the theoretical predictions, which validate the effectiveness of the proposed new coupling structure and corresponding filter design technique. In addition, the designed filter exhibits good characteristics, such as sharp skirt selectivity, very wide stopband, compact in size, etc.
Keyword (in Japanese) (See Japanese page) 
(in English) Filter synthesis/design / ultra-wideband bandpass filter / stub-loaded / short-circuited parallel-coupled three-line / / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 62, MW2009-16, pp. 41-46, May 2009.
Paper # MW2009-16 
Date of Issue 2009-05-21 (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 MW2009-16

Conference Information
Committee MW  
Conference Date 2009-05-28 - 2009-05-28 
Place (in Japanese) (See Japanese page) 
Place (in English) Okayama Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave Technologies 
Paper Information
Registration To MW 
Conference Code 2009-05-MW 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Synthesis/Design of Novel Ultra-Wideband Bandpass Filter Using Open-Ended Stub Loaded Parallel Coupled Three-Line Unit 
Sub Title (in English)  
Keyword(1) Filter synthesis/design  
Keyword(2) ultra-wideband bandpass filter  
Keyword(3) stub-loaded  
Keyword(4) short-circuited parallel-coupled three-line  
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Keyword(6)  
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1st Author's Name Chun-Ping Chen  
1st Author's Affiliation Kanagawa University (Kanagawa Univ.)
2nd Author's Name Yoshinori Takakura  
2nd Author's Affiliation Kanagawa University (Kanagawa Univ.)
3rd Author's Name Hiroshige Nihei  
3rd Author's Affiliation Kanagawa University (Kanagawa Univ.)
4th Author's Name Zhewang Ma  
4th Author's Affiliation Saitama University (Saitama Univ.)
5th Author's Name Tetsuo Anada  
5th Author's Affiliation Kanagawa University (Kanagawa Univ.)
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Speaker Author-1 
Date Time 2009-05-28 15:25:00 
Presentation Time 25 minutes 
Registration for MW 
Paper # MW2009-16 
Volume (vol) vol.109 
Number (no) no.62 
Page pp.41-46 
#Pages 6 
Date of Issue 2009-05-21 (MW) 

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