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| Presentation | 2018-12-13 10:10 A High-order Cul-de-Sac Coupling Bandpass Filter Design Using Even/Odd-mode Stepped Impedance Resonators Ryo Mikase, Masataka Ohira, Zhewang Ma (Saitama Univ.)  MW2018-115 Link to ES Tech. Rep. Archives: MW2018-115 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | In the design of bandpass filters (BPFs), transmission zeros (TZs) can be generated at arbitrary frequency positions by using a generalized Chebyshev function, thereby providing a high degree of freedom for filter synthesis. A fully canonical N-th order Cul-de-Sac BPF can generate up to N TZs, which is the maximal number that can be produced by the filter synthesis theory. In order to generate N TZs, a source to load coupling must be introduced, resulting in low attenuation level at stopband. To solve this problem, a novel Cul-de-Sac coupling topology having two resonators between source and load is introduced in this paper for large attenuation level at stopband. In addition, a microstrip BPF realizing the novel Cul-de-Sac coupling topology is also proposed. The proposed BPF employs even/odd-mode stepped impedance resonators for a wide stopband response. The effectiveness of the proposed Cul-de-Sac BPF are demonstrated through two design examples. The first design example is a fifth-order BPF having two TZs at lower stopband and one TZ at upper stopband, while the second one is a sixth-order BPF which having two TZs at symmetric frequency positions with respect to center frequency. The validity of the proposed Cul-de-Sac coupling topology and its microstrip BPF structure is verified by the comparison of the frequency responses between EM-simulated and measured results. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | bandpass filter / transmission zeros / coupling matrix / Cul-de-Sac coupling / stepped impedance resonators / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 118, no. 361, MW2018-115, pp. 7-12, Dec. 2018. | |
| Paper # | MW2018-115 | |
| Date of Issue | 2018-12-06 (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 | MW2018-115 Link to ES Tech. Rep. Archives: MW2018-115 |
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| Conference Information | |
| Committee | MW |
| Conference Date | 2018-12-13 - 2018-12-14 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kanagawa Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | MW |
| Conference Code | 2018-12-MW |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A High-order Cul-de-Sac Coupling Bandpass Filter Design Using Even/Odd-mode Stepped Impedance Resonators |
| Sub Title (in English) | |
| Keyword(1) | bandpass filter |
| Keyword(2) | transmission zeros |
| Keyword(3) | coupling matrix |
| Keyword(4) | Cul-de-Sac coupling |
| Keyword(5) | stepped impedance resonators |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Ryo Mikase |
| 1st Author's Affiliation | Saitama University (Saitama Univ.) |
| 2nd Author's Name | Masataka Ohira |
| 2nd Author's Affiliation | Saitama University (Saitama Univ.) |
| 3rd Author's Name | Zhewang Ma |
| 3rd Author's Affiliation | Saitama University (Saitama Univ.) |
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| Speaker | Author-1 |
| Date Time | 2018-12-13 10:10:00 |
| Presentation Time | 25 minutes |
| Registration for | MW |
| Paper # | MW2018-115 |
| Volume (vol) | vol.118 |
| Number (no) | no.361 |
| Page | pp.7-12 |
| #Pages | 6 |
| Date of Issue | 2018-12-06 (MW) |
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