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| Presentation | 2016-01-14 13:00 Design of Fully Canonical Cul-de-Sac Coupling Microstrip Filters Having Transmission Zeros for Symmetric and Asymmetric Frequency Responses Toshiki Kato, Masataka Ohira, Zhewang Ma (Saitama Univ.)  MW2015-159 Link to ES Tech. Rep. Archives: MW2015-159 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | A microwave bandpass filter having a generalized Chebyshev function characteristic can generate transmission zeros at arbitrary frequencies in stopbands. Thus, it is possible to realize a symmetric or asymmetric frequency response with respect to the center frequency of passband. As such versatility can be more attractive than conventional characteristic functions, we have proposed a fully canonical Cul-de-Sac coupling microstrip filter to provide a generalized Chebyshev function with a single-layer planar filter structure. However, a direct source/load(S/L) coupling appearing in the filter, which is greater than a desired value obtained by the circuit synthesis, may degrade stopband responses. In this paper, we propose a new fully canonical Cul-de-Sac coupling filter structure that can suppress the direct S/L coupling by using a novel excitation structure for resonators. The proposed filter structure allows us to adjust the direct S/L coupling, thereby realizing fully canonical filters having the maximum number of transmission zeros. To show the effectiveness, we have designed three fourth-order bandpass filters with four transmission zeros located at symmetric or asymmetric frequency positions with respect to the same passband response. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Bandpass filters / transmission zeros / fully canonical Cul-de-Sac coupling matrix / direct S/L coupling / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 115, no. 391, MW2015-159, pp. 1-6, Jan. 2016. | |
| Paper # | MW2015-159 | |
| Date of Issue | 2016-01-07 (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 | MW2015-159 Link to ES Tech. Rep. Archives: MW2015-159 |
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| Conference Information | |
| Committee | MW |
| Conference Date | 2016-01-14 - 2016-01-15 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kikai-Shinko-Kaikan Bldg. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Microwave Technologies / 50th Anniversary Special Talks |
| Paper Information | |
| Registration To | MW |
| Conference Code | 2016-01-MW |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Design of Fully Canonical Cul-de-Sac Coupling Microstrip Filters Having Transmission Zeros for Symmetric and Asymmetric Frequency Responses |
| Sub Title (in English) | |
| Keyword(1) | Bandpass filters |
| Keyword(2) | transmission zeros |
| Keyword(3) | fully canonical Cul-de-Sac coupling matrix |
| Keyword(4) | direct S/L coupling |
| Keyword(5) | |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Toshiki Kato |
| 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 | 2016-01-14 13:00:00 |
| Presentation Time | 30 minutes |
| Registration for | MW |
| Paper # | MW2015-159 |
| Volume (vol) | vol.115 |
| Number (no) | no.391 |
| Page | pp.1-6 |
| #Pages | 6 |
| Date of Issue | 2016-01-07 (MW) |
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