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Paper Abstract and Keywords
Presentation 2008-08-28 10:35
A Microstrip Bandpass Filter with Ultra Wide Stopband using Folded Stepped-Impedance Resonators
Somboon Theerawisitpong, Toshitatsu Suzuki, Hirotoshi Yamada, Noboru Morita (Nippon Inst. of Tech.), Yozo Utsumi (NDA) MW2008-80
Abstract (in Japanese) (See Japanese page) 
(in English) We developed a bandpass filter using folded stepped-impedance resonators where center frequency is 2 GHz with 60 MHz bandwidth for UMTS (Universal Mobile Telecommunication System) band. Out-of-band rejection is designed by stepped-impedance resonator characteristics, and pass-band is designed by a procedure which is proposed in this paper. The measurement results of a prototype Tchebycheff filter are well agreed with the simulation results on both pass-band and out-of-band ranges. The measured center frequency is 2.01 GHz, pass bandwidth is 69 MHz with 0.3dB-ripple, and pass-band insertion loss is 1.45 dB. The unloaded quality factor Qo is 488.63. And the out-of-band attenuation is bigger than 30 dB from approximately 2.5 to 9.5 GHz.
Keyword (in Japanese) (See Japanese page) 
(in English) Microstrip Filter / Ultra Wide Stopband / Stepped-Impedance Resonator / Harmonic Suppression / / / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 195, MW2008-80, pp. 7-12, Aug. 2008.
Paper # MW2008-80 
Date of Issue 2008-08-21 (MW) 
ISSN Print edition: ISSN 0913-5685    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 2008-08-28 - 2008-08-29 
Place (in Japanese) (See Japanese page) 
Place (in English) Osaka-Univ. (Toyonaka) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave Technologies 
Paper Information
Registration To MW 
Conference Code 2008-08-MW 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Microstrip Bandpass Filter with Ultra Wide Stopband using Folded Stepped-Impedance Resonators 
Sub Title (in English)  
Keyword(1) Microstrip Filter  
Keyword(2) Ultra Wide Stopband  
Keyword(3) Stepped-Impedance Resonator  
Keyword(4) Harmonic Suppression  
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1st Author's Name Somboon Theerawisitpong  
1st Author's Affiliation Nippon Institute of Technology (Nippon Inst. of Tech.)
2nd Author's Name Toshitatsu Suzuki  
2nd Author's Affiliation Nippon Institute of Technology (Nippon Inst. of Tech.)
3rd Author's Name Hirotoshi Yamada  
3rd Author's Affiliation Nippon Institute of Technology (Nippon Inst. of Tech.)
4th Author's Name Noboru Morita  
4th Author's Affiliation Nippon Institute of Technology (Nippon Inst. of Tech.)
5th Author's Name Yozo Utsumi  
5th Author's Affiliation National Defence Academy (NDA)
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Speaker Author-1 
Date Time 2008-08-28 10:35:00 
Presentation Time 25 minutes 
Registration for MW 
Paper # MW2008-80 
Volume (vol) vol.108 
Number (no) no.195 
Page pp.7-12 
#Pages 6 
Date of Issue 2008-08-21 (MW) 

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