Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
You could try using a pulse isolation transformer, this would give give you your isolation, it could also do some impedance matching(~ 10:1 required). This would have to have a high pass filter as well with a pass band tuned to your carrier frequency (which you do not give)