redesign circuit to test self interference cancellation on 28 Ghz and make simulation

Hello, I want te redesign circuit to test self interference cancellation on 28 Ghz with different Bandwidth 5 mhz and 10mhz and 20 mhz to check the amount of self interference can be cancelled. Why I choose 28 Ghz because at this will be the frequency for 5G . Self interference cancellation has many techniques one of them is antenna cancellation So, in order to be newest need to implement on this new frequency channel. And show the system performance. I attached the circuit check it please