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| Presentation | 2008-11-21 13:35 Synthesis of Ultra-Wideband (UWB) Bandpass Filters by Multistage of Coupled Stepped-Impedance Resonators and Short-Circuited Stubs Chun-Ping Chen, Hiroshige Nihei (Kanagawa Univ.), Zhewang Ma (Saitama Univ.), Tetsuo Anada (Kanagawa Univ.)  MW2008-140 Link to ES Tech. Rep. Archives: MW2008-140 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | In terms of the transmission-line theory, a synthesis of an ultra-wideband bandpass (UWB) filter prototype composed of multistage stepped-impedance resonators (SIRs) and two short-circuited shunt stubs positioned at input- and output- ports is presented. Following the derivation of the equivalent circuit and the corresponding Chebyshev-type filtering function, the synthesis procedure is described in detail. Furthermore, a design table is created for practical design of the UWB filters. As an example, a two stage UWB filter with an FBW of 110% is synthesized based on the proposed filter prototype to meet FCC’s outdoor mask. The synthesized circuit model are confirmed by the commercial circuit simulator and then optimized by the EM simulator, fabricated in microstrip line and characterized by the network analyzer. The good agreements between the measured and predicted frequency responses validate the effectiveness of newly proposed filter structure and the corresponding synthesis technique. In addition, the designed filter exhibits good characteristics of comparatively low insertion loss, quite sharp skirt, very flat group delay and good stopband (especially in lower one) as well. It should be also highlighted that, compared with the conventional parallel-coupled stepped-impedance-resonator (SIRs) filter, the newly proposed filter structure can reduce the total length of about 3/4g. Moreover, in terms of the presented design technique, the proposed filter prototype can be also used to easily realize the UWB filters with an FBW even greater than 110%. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Bandpass filters (BPFs) / ultra-wideband (UWB) / filter synthesis / filter prototype / compact filter / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 108, no. 311, MW2008-140, pp. 125-130, Nov. 2008. | |
| Paper # | MW2008-140 | |
| Date of Issue | 2008-11-13 (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 | MW2008-140 Link to ES Tech. Rep. Archives: MW2008-140 |
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| Conference Information | |
| Committee | MW |
| Conference Date | 2008-11-20 - 2008-11-21 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Nagasaki-Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | MW |
| Conference Code | 2008-11-MW |
| Language | English (Japanese title is available) |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Synthesis of Ultra-Wideband (UWB) Bandpass Filters by Multistage of Coupled Stepped-Impedance Resonators and Short-Circuited Stubs |
| Sub Title (in English) | |
| Keyword(1) | Bandpass filters (BPFs) |
| Keyword(2) | ultra-wideband (UWB) |
| Keyword(3) | filter synthesis |
| Keyword(4) | filter prototype |
| Keyword(5) | compact filter |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Chun-Ping Chen |
| 1st Author's Affiliation | Kanagawa University (Kanagawa Univ.) |
| 2nd Author's Name | Hiroshige Nihei |
| 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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| Speaker | Author-1 |
| Date Time | 2008-11-21 13:35:00 |
| Presentation Time | 25 minutes |
| Registration for | MW |
| Paper # | MW2008-140 |
| Volume (vol) | vol.108 |
| Number (no) | no.311 |
| Page | pp.125-130 |
| #Pages | 6 |
| Date of Issue | 2008-11-13 (MW) |
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