Research on Signal Attenuation by Humidity and Rain in 60GHz Frequency Band

With the rapid development of wireless communication technology, millimeter-wave band (30GHz to 300GHz) has begun to serve global communication. Among them, 38GHz, 77GHz and 120GHz are relatively mature in research and application. 60GHz has become one of the most promising frequency bands in future wireless communication technology due to its large bandwidth and license-free characteristics. Firstly, based on millimeter wave wireless communication, this paper expounds the attenuation factors affecting 60GHz signal transmission, and establishes millimeter wave models considering water vapor content indoors and rain attenuation outdoors respectively. Finally, by capturing and processing received signal strength indication (RSSI) and receiving rate changes of signals, the attenuation effect of water molecules on 60GHz millimeter wave signals in communication environment is analyzed. The results show that both gaseous water vapor and liquid raindrops have a significant attenuation effect on the 60GHz signal. This research is expected to play an important reference and promotion role in the field of processing 5G millimeter wave and even future 6G signal coverage and optimization.