Re: 6cm rf?
Have you looked at the FPV booster amps for drones?, i used these on 5.8 GHz Analogue ATV from memory they use
a pair of devices and achieve 4 Chinese watts
Found one on ebay, £26 from China or £30 from Amazon.
5.8GHz Wireless AV Transmitter Signal Booster Power Amplifier Extend Range Tools
( 283789697590 )