Trying to build an RF receiver for x, k, ka, ku bands

After doing a lot of research online I haven't been able to find any information for building your own RF Receiver, any help would be great thanks!

Those are microwave bands which require very specialized and complex microstrip and waveguide design expertise, so it's not surprising you found little on the internet about that. Certainly it's not something for a beginner (and if you have to ask how to do it, you are a beginner).

Well thanks for that detailed information, I'm glad you added that!