Modeling and Variation Characteristics of Microwave Brightness Temperature of Water in Indoor Environments
Year: 2026
Type: conference-paper
Abstract: Passive microwave imaging has unique advantages in detecting water surface targets, especially aquatic transparent floating objects. Therefore, exploring the microwave radiation characteristics of background water surfaces is significant for the effective detection of waterborne transparent floating targets. This paper presents a multi-parameter microwave radiometry simulation of water. Taking indoor single-layer pure water medium in the 2–4 GHz band as the research object, it analyzes the effects of incident angle and water temperature on brightness temperature(TB) under vertical and horizontal polarizations. Simulation results are obtained via water surface modeling, parameter configuration and scenario simulation. The results show that horizontally polarized TB decreases with the rising incident angle, while vertically polarized TB first increases to a distinct peak and then declines. At a fixed incident angle, the TB of both polarizations increases linearly with water temperature, and higher frequencies yield higher temperature sensitivity. This study reveals the coupling relationship among incident angle, water temperature and permittivity, which provides a reliable theoretical foundation for subsequent related research.
Authors: Zhengyin Wen, Yayun Cheng, Shiqin Li, Jinghui Qiu
Institution: Harbin Institute of Technology
Language: English
Subfield: Environmental Engineering
Field: Environmental Science
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W7206218311