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Paper Abstract and Keywords
Presentation 2026-05-15 09:30
On the Generation of Microstrip BPF Geometric Images Using an Inverse Model Built with Latent Diffusion Model
Ryota Maezaki, Masataka Ohira, Diroyuki Deguchi (Doshisha Univ.) MW2026-14
Abstract (in Japanese) (See Japanese page) 
(in English) This paper proposes an inverse model that generates high-resolution geometry images of microwave bandpass filters (BPFs) from coupling matrices by introducing a latent diffusion model (LDM). Recently, inverse models based on diffusion model have been studied as a new approach to microwave filter design, in which filter geometries are synthesized from desired frequency responses. However, the geometry images generated by existing inverse models have extremely low resolution, resulting in complex filter geometries. To overcome this problem, the proposed inverse model consists of a variational autoencoder (VAE) and a diffusion model. First, the VAE compresses BPF geometry images into a latent space. Next, the diffusion model generates geometry images in the latent space. This approach allows us to generate of high-resolution BPF geometry images, thereby enabling fine adjustment of resonator lengths and spacings on the generated images. As a case study, an inverse model for a third-order BPF is constructed to demonstrate the effectiveness of the proposed approach.
Keyword (in Japanese) (See Japanese page) 
(in English) Microstrip bandpass filters / Inverse model / Latent diffusion model / / / / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 24, MW2026-14, pp. 29-34, May 2026.
Paper # MW2026-14 
Date of Issue 2026-05-07 (MW) 
ISSN 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 MW2026-14

Conference Information
Committee MW  
Conference Date 2026-05-14 - 2026-05-15 
Place (in Japanese) (See Japanese page) 
Place (in English) Sannomiya convention center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave, etc. 
Paper Information
Registration To MW 
Conference Code 2026-05-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) On the Generation of Microstrip BPF Geometric Images Using an Inverse Model Built with Latent Diffusion Model 
Sub Title (in English)  
Keyword(1) Microstrip bandpass filters  
Keyword(2) Inverse model  
Keyword(3) Latent diffusion model  
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1st Author's Name Ryota Maezaki  
1st Author's Affiliation Doshisha University (Doshisha Univ.)
2nd Author's Name Masataka Ohira  
2nd Author's Affiliation Doshisha University (Doshisha Univ.)
3rd Author's Name Diroyuki Deguchi  
3rd Author's Affiliation Doshisha University (Doshisha Univ.)
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Speaker Author-1 
Date Time 2026-05-15 09:30:00 
Presentation Time 25 minutes 
Registration for MW 
Paper # MW2026-14 
Volume (vol) vol.126 
Number (no) no.24 
Page pp.29-34 
#Pages 6 
Date of Issue 2026-05-07 (MW) 

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