the radio frequency portion of the electromagnetic spectrum specifically the part ranging from 1 Hz to 3000 GHz (3 THz). Currently only frequency bands between 9 kHz and 275 GHz have been allocated (i.e., designated for use under specified conditions) (27). The spectrum is divided into different frequency bands, and each band has been allocated for a specific application, ranging from aeronautical and maritime communication to AM and FM radio stations (41). Figure 2 shows the frequency allocations on the radio spectrum. https://cavtaskforce.texas.gov/wp-content/uploads/2021/08/image003-1024×669.png
