This is example of a 10GHz full duplex Transceiver that can use a pair of 200kHz to 8MHz channels any frequency in a pair of 30MHz bands

Receive band  is at 10.2GHz and Transmit band at 10.6MHz, Both are easily modified to be +/- 100MHz or more.

These cost under €300 and run of 12V @ 600mA fed on the IF coax (which is input  at HF/VHF or UHF if 1st mixer is bypassed and out on UHF.