Finding Impedences in both directions in between my two stage low noise amplifier

[Faizan shafi]

I am designing a W Band low noise amplifier . I have used two cascode stages each one optimized at different frequency point. I have attach the diagram below.
I am getting the desired results but I just want to understand this circuit more.

I just want to see exactly how much each stage is contributing in the overall circuit.

For that reason I want to know how can i find the impedances at the intermediate point of my overall circuit.

I want to know what impedance my first stage is seeing at the output side and similarly what impedance my second stage is seeing at the input side. I want to know how big of a mismatch there is . SO maybe i can add some components and control the gain of each stage in a much better way.
In the picture below I have put arraows to indicate the point and direction in which i want to see the impedances .

I am using ADS software. I have heard there is a component or a tool in it which i can connect in the middle and it will show the impedance it sees in both directions.
I know there I can also divide this circuit in to two parts and seperatly find the input outout impedances and then put those values in my port component and I dont think its the right approach.

Thank you

 

[BigBoss]

You can use SProbe2 to see the impedances for two ways.
There are also other methods. For more information see help.