Hopefully the screenshot below will show up.
Here is equation 8.3 of Mason Unilateral Gain from Vendelin, Pavio, and Rohde’s book
Microwave Circuit Design Using Linear And Nonlinear Techniques.
We don’t calculate U. You could come up with a calculator expression for this.
The closest we calculate is Gumx.
Chapter 10 of the MMSIM11.1 Virtuoso® Spectre® Circuit Simulator and Accelerated Parallel Simulator RF Analysis User Guide
contains the different gains that we calculate and their equations.
GA (available gain) is the power gain obtained by optimally matching the output of the network.
GP (power gain) is the power gain obtained by optimally matching the input of the network.
GT (transducer gain) shows the insertion effect of a two-port circuit. This quantity is used in amplifier design.
Gumx (maximum unilateral transducer power gain)
Gmax (maximum available gain) shows the transducer power gain when there exists a simultaneous conjugate match at both ports.
Gmsg (maximum stable gain) shows the gain that can be achieved by resistively loading the two-port such that k = 1 and then simultaneously conjugately matching the input and output ports. For conditionally stable two-ports, you can approach the maximum stable gain as you reduce the input and output mismatch. If you attempt a simultaneous conjugate match and k < 1, the two-port oscillates.
Staff Support AE, Global Customer Support
Cadence Design Systems, Inc.