If we wanted to call inter-planet would we need to put a giant transmitter on Mars?

Let's say I wanted to call my friend who lived on Saturn and I live on earth, how big would a transmitter need to be for me to get a connection between earth and saturn?If we wanted to call inter-planet would we need to put a giant transmitter on Mars?A radio transmitter and receiver on both ends would be preferred. I wonder, though, if a cell phone signal were strong enough, perhaps putting a few satellites in orbit around the Sun, say, at Earth's L4 and L5 points, would give you complete coverage of the solar system this would work even when Saturn was behind the Sun. You'd still need a really strong transmission and/or very sensitive receiver.If we wanted to call inter-planet would we need to put a giant transmitter on Mars?
Putting a repeater on Mars makes no sense. There are times when the Earth is closer to Saturn than Mars is.



It doesn't take much of a transmitter to send a message to Saturn, it just takes a lot of time as the distance is great.



Besides, Saturn is a gas giant and the winds get a bit too high for comfort. You wouldn't be able to live ON Saturn.If we wanted to call inter-planet would we need to put a giant transmitter on Mars?We have robotic explorers in the Saturn system, and can communicate with them just fine, using antennae that are about 2 meters in diameter.If we wanted to call inter-planet would we need to put a giant transmitter on Mars?
The rovers all got by with their little low power transmitters and giant antenna on the earth.If we wanted to call inter-planet would we need to put a giant transmitter on Mars?That would cost too much money. Not only to make the transmitter, but to bring it to mars, that would cost hundreds of millions.If we wanted to call inter-planet would we need to put a giant transmitter on Mars?
Why would you want to call a different planet? Who would want to live on mars or Saturn?