Microdiversity and Vegetation Influence on Forward Scattering at 60 GHz and 80 GHz

TL;DR

This study investigates how vegetation and tiny antenna movements affect signal propagation at 60 GHz and 80 GHz, revealing higher sensitivity and power fluctuations at 80 GHz in an indoor environment.

Contribution

It provides experimental insights into the effects of microdiversity and vegetation on forward scattering at millimeter-wave frequencies, emphasizing differences between 60 GHz and 80 GHz bands.

Findings

80 GHz shows higher sensitivity to micro-movements than 60 GHz.

Vegetation causes notable variations in received signal power.

Small antenna shifts significantly impact channel impulse response.

Abstract

Understanding the impact of vegetation and small-scale antenna movements on signal propagation is important for the design and optimization of high-frequency wireless communication systems. This paper presents an experimental study analyzing signal propagation at 60 GHz and 80 GHz in the presence of vegetation, with a focus on forward scattering and microdiversity effects. A controlled measurement campaign was conducted in an indoor environment, where the influence of a potted plant placed in the line-of-sight (LOS) path between the transmitter and receiver was investigated. The study examines the effects of antenna micro-shifts on the channel impulse response (CIR), highlighting variations in received power due to small positional changes of the antennas. The results indicate that the 80 GHz band exhibits higher sensitivity to micro-movements compared to the 60 GHz band, leading to greater fluctuations in received power.