A radio station was a location from which radio signals were broadcast.
In Los Angeles in 2024, there was a sign on the interior of a Metro Local bus that served as an advertisement for a local radio station on FM 88.8 that was called Los Angelenos Rock. (PIC: "Watcher")
In 2268, James T. Kirk instructed Spock to locate the radio station on Sigma Iotia II in order to establish contact with the USS Enterprise. (TOS: "A Piece of the Action")
In a deleted scene from ENT: "Storm Front", Jonathan Archer claimed that "a friend at a radio station" once made an audio recording of The War of the Worlds, which Archer's engineer aboard Enterprise had played for him.