123Splat:
try a couple of NRF2401 breakout boards with preamps, LNA's, and external antennae. There's a guy on this forum who sells good ones. Then go to GearBest or BangGood and get a 2W 2GHz linear amp for the xmit side. look up some good antennae. That's the EASY part.After that, and you have wasted a bunch of time and effort (but maybe learned some things), study up on open source flight controllers.
Datapoint: nRF24L01's plus LNA, PA, whip antennas got me < 20m range at 2Mbaud. Anything at microwave frequencies is going to underperform compared to VHF.
[ I suspect a more sensitive receiver than the nRF chip is needed anyway, its designed for 2.4G where noise levels are very high so a deaf receiver is OK (you detect fewer local microwave ovens that way). If staying with microwave higher power like that 2W and choosing a quieter band than 2.4 would be wise ]