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Paper Abstract and Keywords
Presentation 2007-08-03 09:25
Synthesis of Ultra-Wideband Bandpass Filter Using Parallel Coupled MMRs of One-Wavelength
Naoki Nagaoka, Chun-Ping Chen (Kanagawa Univ.), Zhewang Ma (Saitama Univ.), Tetsuo Anada (Kanagawa Univ.) MW2007-68 OPE2007-55 Link to ES Tech. Rep. Archives: MW2007-68 OPE2007-55
Abstract (in Japanese) (See Japanese page) 
(in English) A transmission-line-theory-based novel synthesis theory is proposed to design an ultra-wideband bandpass filter to meet Federal Communications Commission (FCC)’s spectrum limit. One-wavelength parallel coupled stepped-impedance resonators (SIRs) are used to achieve a fraction passband from 3.1GHz to 10.6GHz (greater than 100%). An unsymmetrical SIR is employed to replace the conventional centrally-symmetrical one, so that the coupling gap is successfully enlarged to alleviate the requirement on fabrication precision. A simpler equivalent circuit for the parallel coupled-line is used in this synthesis to avoid calculation of parameter J. As an example, a filter with two-stages is synthesized, simulated and fabricated. The good agreement between the measured and predicted results validates the effectiveness of newly proposed synthesis theory. Meanwhile, the designed filter exhibits good characteristics of low insertion loss, sharp skirts, flat group delay and good stop-band (especially at lower one) as well.
Keyword (in Japanese) (See Japanese page) 
(in English) UWB-bandpass filter / Synthesis theory / Parallel coupled line / Stepped- impedance resonator / / / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 172, MW2007-68, pp. 147-152, Aug. 2007.
Paper # MW2007-68 
Date of Issue 2007-07-26 (MW, OPE) 
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. (No. 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF MW2007-68 OPE2007-55 Link to ES Tech. Rep. Archives: MW2007-68 OPE2007-55

Conference Information
Committee EMT OPE MW  
Conference Date 2007-08-02 - 2007-08-03 
Place (in Japanese) (See Japanese page) 
Place (in English) Muroran Institute of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To MW 
Conference Code 2007-08-EMT-OPE-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Synthesis of Ultra-Wideband Bandpass Filter Using Parallel Coupled MMRs of One-Wavelength 
Sub Title (in English)  
Keyword(1) UWB-bandpass filter  
Keyword(2) Synthesis theory  
Keyword(3) Parallel coupled line  
Keyword(4) Stepped- impedance resonator  
1st Author's Name Naoki Nagaoka  
1st Author's Affiliation Kanagawa University (Kanagawa Univ.)
2nd Author's Name Chun-Ping Chen  
2nd Author's Affiliation Kanagawa University (Kanagawa Univ.)
3rd Author's Name Zhewang Ma  
3rd Author's Affiliation Saitama University (Saitama Univ.)
4th Author's Name Tetsuo Anada  
4th Author's Affiliation Kanagawa University (Kanagawa Univ.)
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Date Time 2007-08-03 09:25:00 
Presentation Time 25 
Registration for MW 
Paper # IEICE-MW2007-68,IEICE-OPE2007-55 
Volume (vol) IEICE-107 
Number (no) no.172(MW), no.173(OPE) 
Page pp.147-152 
#Pages IEICE-6 
Date of Issue IEICE-MW-2007-07-26,IEICE-OPE-2007-07-26 

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