Deep Space Network
The radio communication system of "Voyager 1" was designed to be used up to and beyond the limits of the Solar System. The communication system includes a diameter high gain Cassegrain antenna to send and receive radio waves via the three Deep Space Network stations on the Earth. The craft normally transmits data to Earth over Deep Space Network Channel 18, using a frequency of either 2.3 GHz or 8.4 GHz, while signals from Earth to Voyager are transmitted at 2.1 GHz.