2 port VNA measurement

[huytergan]

I have one transmitter antenna at port 1 of a VNA, and one receiver antenna at port 2 of the VNA. I will make measurement of reflection coefficient of S11. Should I turn off the power at port 2 since (otherwise) it will send a power to the receiver antenna and this can make the receiver antenna act like a transmitter antenna which then may be coupling onto the transmitter antenna at port 1? Should I only let VNA to power the port 1, not port 2? I would only test the S11 by disconnecting the port 2. But I wanna measure both S11 and S22 at the same time. So both connected to the VNA.

 

[FvM]

Question makes no sense. A VNA never powers both ports simultaneously.