In summary I am working on a network consisting of 8 cubesat 1U that will be at an orbit altitude of 850Km. The question is that I am working on communications, the idea is that this network of cubesats transmit and receive to earth with UHF band, but that they also have a receiver and transmitter for X-Band to be able to receive and transmit to deep space.
Sorry for the basic image is that I wanted to explain myself better.
My question is, what power does the antenna have to have in order to reach Titan? Would you need a straight or dish antenna? I rely on the Cubesat MarCO, but I don't think it's the same antenna to reach Mars as it is to reach Saturn.