Super High Frequency covers the microwave spectrum from 3 GHz to 30 GHz. These wavelengths are short enough to be highly directional, making them ideal for point-to-point links, satellite communications, and radar. SHF signals require a clear line of sight and are easily absorbed by moisture in the atmosphere, a phenomenon known as rain fade.
Heard on the job
We lost the SHF link to the remote site during the storm because of heavy rain fade on the dish.