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Paper Abstract and Keywords
Presentation 2026-01-27 16:10
Propagation Characteristics in Agricultural Fields and Their Analytical Modeling
Shoma Dei (NIT), Kazuyuki Takasaki (TMCIT), Kouji Shibata (HIT), Hiroyuki Shimizu, Takefumi Hiraguri (NIT) CQ2025-98
Abstract (in Japanese) (See Japanese page) 
(in English) This study focuses on the instability of wireless communication in agricultural fields and aims to develop a radio propagation analysis model specialized for greenhouse environments. As a reference for comparison, propagation measurements were first conducted in an actual tomato greenhouse field. The results confirmed that the received power, i.e., communication quality, fluctuates significantly due to signal attenuation caused by plant bodies and multipath effects. Furthermore, the measurements revealed that the variation trends of propagation characteristics differ depending on the crop vegetation density. Based on these findings, a propagation analysis model for greenhouse environments was constructed in a virtual space where the actual field was reconstructed three-dimensionally. In this model, structures representing leaves and stems were placed, and their electromagnetic properties were defined using the complex permittivity of plants measured in advance. Electromagnetic field simulations were then performed using these parameters. To represent the effect of crop vegetation density, the complex permittivity was modeled as a stochastic parameter, and multiple propagation paths were analyzed along the same transmission route. This approach enables the reproduction of the inherent uncertainty in plant characteristics. A comparison between the simulation results and the measured propagation characteristics showed that the overall radio wave propagation trends across the field were in good agreement. In addition, similar propagation characteristics were obtained in areas where the vegetation density varied. These results demonstrate that it is possible to reconstruct an actual agricultural field in a virtual environment and to develop a propagation analysis model that can adapt to environmental changes within the field.
Keyword (in Japanese) (See Japanese page) 
(in English) Complex permittivity of plants / Greenhouse propagation analysis model / Virtual greenhouse environment / / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 335, CQ2025-98, pp. 120-125, Jan. 2026.
Paper # CQ2025-98 
Date of Issue 2026-01-19 (CQ) 
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 CQ2025-98

Conference Information
Committee CQ CBE  
Conference Date 2026-01-26 - 2026-01-27 
Place (in Japanese) (See Japanese page) 
Place (in English) The Beppu Chamber of Commerce and Industry 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Network Science, Computational Social Science, Human Computer Interaction, Data Analysis, User Behaviour, Media Quality, etc. 
Paper Information
Registration To CQ 
Conference Code 2026-01-CQ-CBE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Propagation Characteristics in Agricultural Fields and Their Analytical Modeling 
Sub Title (in English)  
Keyword(1) Complex permittivity of plants  
Keyword(2) Greenhouse propagation analysis model  
Keyword(3) Virtual greenhouse environment  
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1st Author's Name Shoma Dei  
1st Author's Affiliation Nippon Institute of Technology (NIT)
2nd Author's Name Kazuyuki Takasaki  
2nd Author's Affiliation Tokyo Metropolitan College of Industrial Technology (TMCIT)
3rd Author's Name Kouji Shibata  
3rd Author's Affiliation Hachinohe Institute of Technology (HIT)
4th Author's Name Hiroyuki Shimizu  
4th Author's Affiliation Nippon Institute of Technology (NIT)
5th Author's Name Takefumi Hiraguri  
5th Author's Affiliation Nippon Institute of Technology (NIT)
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Speaker Author-1 
Date Time 2026-01-27 16:10:00 
Presentation Time 20 minutes 
Registration for CQ 
Paper # CQ2025-98 
Volume (vol) vol.125 
Number (no) no.335 
Page pp.120-125 
#Pages 6 
Date of Issue 2026-01-19 (CQ) 

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