==NATO C band== The NATO C band is that portion of the electromagnetic spectrum between 500 MHz and 1000 MHz. IEEE C band The IEEE C band is a portion of the electromagnetic spectrum in the microwave range of frequencies ranging from 4 to 8 GHz.. It was the first frequency band allocated for commercial ground-to-satellite communications. A typical C band satellite uses 3.7–4.2 GHz for downlink, and 5.925–6.425 GHz for uplink. C band is primarily used for open satellite communicatio… (More on C-band)