Research on the Influence of Mechanical Vibration on Radio Wave Propagation

The mechanical vibration of antenna might cause vibration of the path loss of the electric wave propagation, especially under high electric wave frequencies. In this paper, the impact of mechanical vibration on wireless communication path loss in 5G communication is analyzed, including sub 6-GHz and mmWave frequencies. An experimental method is proposed including suggested antenna types, positions and frequencies and a series of experiments were conducted. Two types of antennas and one vibrating table are used to set different mechanical vibration and antenna situations. Three hundred received voltages are collected through self-control system to calculate range, standard deviation and median as path loss statistical identity. It is concluded that the amplitude and direction of mechanical vibration will largely affect the range and standard deviation of path loss. But other parameters like frequency will not, especially median. Higher frequency of radio signal will cause more sensitive path loss to mechanical vibration. And by analysis, multipath characteristc is the reason that path loss of omnidirectional antenna is more volatile than directional antenna. With the application of 5G, the path loss fluctuation caused by mechanical vibration is a negative factor, and it is necessary to mitigate its negative impact.