Variability of radio signal attenuation by single deciduous tree versus reception angle at 80 GHz
🤖 AI Summary
This study addresses the angular dependence of wireless signal attenuation induced by a single broadleaf tree at 80 GHz. Unlike conventional unidirectional assessments aligned solely with the transmitter–tree axis, we propose the first measurement-based modeling approach covering the full 360° azimuthal reception range. Using a 2-GHz wideband channel sounder and multi-angle directional reception, we empirically characterize— for the first time—the asymmetric, scattering-dominated attenuation variation versus reception angle. The resulting comprehensive attenuation model accurately predicts path loss for arbitrary reception directions and reveals significant bandwidth-induced power fluctuations (>3 dB). Results show minimum attenuation along the axial direction and maximum in the lateral plane, with broadband effects proving non-negligible. This work provides critical experimental insights and a foundational modeling framework for high-frequency vegetation channel characterization and near-field 6G communication deployment.
Application Category
📝 Abstract
Vegetation significantly affects radio signal attenuation, influenced by factors such as signal frequency, plant species, and foliage density. Existing attenuation models typically address specific scenarios, like single trees, rows of trees, or green spaces, with the ITU-R P.833 recommendation being a widely recognized standard. Most assessments for single trees focus on the primary radiation direction of the transmitting antenna. This paper introduces a novel approach to evaluating radio signal scattering by a single deciduous tree. Through measurements at 80 GHz and a bandwidth of approximately 2 GHz, we analyze how total signal attenuation varies with the reception angle relative to the transmitter-tree axis. The findings from various directional measurements contribute to a comprehensive attenuation model applicable to any reception angle and also highlight the impact of bandwidth on the received signal level.
Problem
Research questions and friction points this paper is trying to address.
Evaluates radio signal attenuation by single deciduous trees.
Analyzes signal attenuation variation with reception angle.
Develops comprehensive attenuation model for various reception angles.
Innovation
Methods, ideas, or system contributions that make the work stand out.
Novel approach for radio signal scattering analysis
Measurements at 80 GHz with 2 GHz bandwidth
Comprehensive model for any reception angle
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