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Paper Abstract and Keywords
Presentation 2022-10-20 15:00
A Study on Permittivity Estimation of Building Materials by Standing Wave Method
Hiroki Aizawa, Toshiyuki Maeyama (Takushoku Univ.) AP2022-143
Abstract (in Japanese) (See Japanese page) 
(in English) The authors are conducting research to estimate indoor propagation characteristics in detail using electromagnetic analysis methods. This requires detailed dielectric constants of the building materials that make up the building, such as walls and floors. Methods for estimating dielectric constant include the waveguide method and the cavity resonator method, but these methods are difficult to use for large, thick specimens such as reinforced concrete walls. Therefore, a free-space method has been proposed to measure the reflection and transmission characteristics of a sample in free space. I pay my attention to the stationary wave method in that and try the estimate of double bare dielectric constants in the reinforcing rod concrete wall of the real building. However, it is expected to be difficult to measure in a real building due to the generation of unwanted reflected waves. Therefore, by applying the following correction method, we were able to obtain a value equivalent to the complex permittivity reported in existing papers. Specifically, it compensates for the free-space propagation loss between the transmitting and receiving antennas and the multipath observed during the measurement. The correction method was confirmed by the ray trace method, and both the actual measurement and the analytical results were able to correct for this. This paper presents the details of these correction methods and the results of applying them to analytical and measured data.
Keyword (in Japanese) (See Japanese page) 
(in English) Free Space Method / Standing Wave Method / Ray Tracing Method / Reinforced Concrete / Complex Relative Permittivity / / /  
Reference Info. IEICE Tech. Rep., vol. 122, no. 214, AP2022-143, pp. 222-227, Oct. 2022.
Paper # AP2022-143 
Date of Issue 2022-10-12 (AP) 
ISSN Online edition: ISSN 2432-6380
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)
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Conference Information
Committee AP  
Conference Date 2022-10-19 - 2022-10-20 
Place (in Japanese) (See Japanese page) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Student Session, Antennas and Propagation 
Paper Information
Registration To AP 
Conference Code 2022-10-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study on Permittivity Estimation of Building Materials by Standing Wave Method 
Sub Title (in English)  
Keyword(1) Free Space Method  
Keyword(2) Standing Wave Method  
Keyword(3) Ray Tracing Method  
Keyword(4) Reinforced Concrete  
Keyword(5) Complex Relative Permittivity  
1st Author's Name Hiroki Aizawa  
1st Author's Affiliation Takushoku University (Takushoku Univ.)
2nd Author's Name Toshiyuki Maeyama  
2nd Author's Affiliation Takushoku University (Takushoku Univ.)
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Speaker Author-1 
Date Time 2022-10-20 15:00:00 
Presentation Time 25 minutes 
Registration for AP 
Paper # AP2022-143 
Volume (vol) vol.122 
Number (no) no.214 
Page pp.222-227 
Date of Issue 2022-10-12 (AP) 

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