THEN WHAT IS THE
RF Link AVS-5812 Wireless Audio/Video Sender (5.8 GHz)
just to try to clarify for you how this works.
The satellite signal comes from the sky and reflects off the dish, into the lnb which converts it into a signal that can pass down the coax.
The satellite receiver then takes that signal and converts it into a signal your tv can understand.
You can't interrupt that signal, nor do they make a device to send that signal between the dish and the receiver wirelessly. It has to be sent over the coax.
They do make devices to send the signal between the receiver and the tv wirelessly. I don't know exactly how well they work, but if there is absolutely no way to get a cable to a location, it may be something to try. You should put the receiver in a closet, another room, ect... and wirelessly send the picture over to the tv.
Here... I drew up a quick sketch, maybe it'll help show what i mean. And it is horrible quality... but I drew it on a laptop touchpad while sitting in my car.