I am currently designing specifications for a human-inhabited station on Mars. Said station would require communications with Earth, to do so requires power. Apparently, a radio telescope is capable of transmission of data. But power is the main concern at the moment; I have not decided on a power source yet. To do so I need to know a radio telescope's peak power consumption to make sure that the lights on the rest of the station don't go out, or, more importantly, the lithium-ion cells are not overloaded (they are apparently combustible).
I would like to have communication speeds close to 256kbit/s (the average uplink speed for satellite internet), and a dish diameter of 30 to 50 meters (which should work for both Earth-Mars comms and some radio astronomy).
Alternatively, if you have suggestions about more effective ways of communication with the Earth from Mars, please let me know and I'll edit the question accordingly.