What the communication used in space travels

And is the radio because was consider technology already conquer and not an experimental technology, and is good to know how far would be the signal of radio study what happens in the space, and also if is to try the signal of radio don’t need to be a manned spacecraft, and the radio that you listen music why don’t work to communication? Because it is only receptor of radio signal, and the radio station is a transmitter, the radio that work is like the ones of boat, or ‘radio amador’, how they work and don’t mess with the commercial radio because is a question of frequency the radio Amador work in a very high or in a very low frequency, and something more could imagine that an alien don’t need have a similar radio device in earth only need be an emitter of radio, the radio wave is universal or would not be a radio wave, and could imagine that even being a different wave could be recognize buy the radio device. Rute Bezerra de Menezes Gondim