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| Presentation | 2019-03-15 14:55 An Automated Design Method of Microstrip BPF with Transmission Zeros Using Both Forward and Inverse Models of Neural Network Ao Yamashita, Masataka Ohira, Zhewang Ma (Saitama Univ.)  MW2018-178 ICD2018-122 Link to ES Tech. Rep. Archives: MW2018-178 ICD2018-122 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | A forward model of neural-network (NN) using poles and residues in rational function of S parameters has already been proposed to rapidly calculate frequency characteristics of microwave bandpass filters (BPF) from structural parameters, which may be suitable for optimization designs of BPF with transmission zeros (TZs). However, the conventional method has two problems: one is that initial values of optimization cannot be determined by the forward model, and the other is that the forward model becomes complicated because the number of parameters to be treated in NN is sextuple the filter order. To solve the problems, in this paper, we propose an automatic optimization design method of BPF with TZs using both forward and inverse models of NN. In the proposed method, a new forward model of NN is introduced to evaluate TZ frequency positions in addition to the forward model for passband evaluation, leading to reduce the number of parameters to be treated in NN. Thus, the proposed method makes it possible to find good initial values with inverse model, and efficiently optimize structural parameters of BPF thanks to two forward models. As an example, we demonstrate that a fourth-order microstrip BPF with two TZs is automatically designed just by inputting a theoretically synthesized coupling matrix. The effectiveness of the proposed method is proven by comparing EM simulated frequency responses of the designed filter with ideal ones. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Bandpass filter / neural network / automatic design / / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 118, no. 506, MW2018-178, pp. 121-126, March 2019. | |
| Paper # | MW2018-178 | |
| Date of Issue | 2019-03-07 (MW, ICD) | |
| 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 | MW2018-178 ICD2018-122 Link to ES Tech. Rep. Archives: MW2018-178 ICD2018-122 |
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| Conference Information | |
| Committee | MW ICD |
| Conference Date | 2019-03-14 - 2019-03-15 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Microwave Integrated Circuit/Microwave Technologies |
| Paper Information | |
| Registration To | MW |
| Conference Code | 2019-03-MW-ICD |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | An Automated Design Method of Microstrip BPF with Transmission Zeros Using Both Forward and Inverse Models of Neural Network |
| Sub Title (in English) | |
| Keyword(1) | Bandpass filter |
| Keyword(2) | neural network |
| Keyword(3) | automatic design |
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| 1st Author's Name | Ao Yamashita |
| 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-2 |
| Date Time | 2019-03-15 14:55:00 |
| Presentation Time | 25 minutes |
| Registration for | MW |
| Paper # | MW2018-178, ICD2018-122 |
| Volume (vol) | vol.118 |
| Number (no) | no.506(MW), no.507(ICD) |
| Page | pp.121-126 |
| #Pages | 6 |
| Date of Issue | 2019-03-07 (MW, ICD) |
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