-Using wideband transistors
-Applying parallel/series ( or both ) feedback
-Implementing multistage PI or T type L-C matching circuits at input nd output
-At higher frequencies, configuring " balanced or distributed" amplifier topologies
How much power are you looking to get from your broadband LNA? What NFmax? IIP3? OIP3? CMRR? The topology that you choose depends on your answers. If you tell me some of the spec, I can give you my opinion on which topology to choose.
Good luck