WiFi Router Information Wanted

We have our broadband via a point to point system using a small dish. The electronics are in the dish and there is a small power unit with 2 ports, one marked router/ computer and one marked antennae cable. At the moment it is connected to the computer and works fine. We have been told that we can connect any router to enable us to use WiFi. We have tried 2 routers with no luck so far. Do we have to change settings on the router or is there something else we don’t know?

That is a question, with regards to specific settings, that the internet provider should be the one to ask/answer.