How to mesurement 4 port component with 2 port VNA

[maleksandar]

Hi,

I have a problem, so big for me.

I have 2 port VNA E5071B Agilent. This is balanced measurements. My component is 4 port LC network for RF application.

Do you have any method for this measurement? Matching transformers on PCB, any idea?


Many thanks.

 

[Chinaski]

Put two matched loads in two ports and measure your network as a two port one using the other two ports. Change the loads and repeat the measurements. If there is no special symmetry in your circuit
you will need six measurements and you will measure every reflection coefficient (vg s_11) three times. Or go and buy a four port VNA

 

[maleksandar]

tnx, this is work correctly? I have termination on 50Ohm for two port for component ends.

Do I need calculating with this measurement?
I need information about S matrix [4x4].


I dont have money for new VNA