Two-port matrices may be cascaded ad infinitum to create structures of arbitrary complexity. Presuming a number of two-port sections A 1 , A 2 ... A N have been cascaded, you may calculate the overall circuit gain.
The various sections could represent, for example,
...and so on until the model is sufficiently rich to satisfy your desire for accuracy.
The TDR response of a complicated two-port model involving N stages, defined as the gain from the input voltage source on the left to a point just to the right of (after) stage M, is
Transmission Line Parameters
Pcb (printed-circuit board) Traces
Generic Building-Cabling Standards
100-Ohm Balanced Twisted-Pair Cabling
150-Ohm STP-A Cabling
Time-Domain Simulation Tools and Methods
Points to Remember
Appendix A. Building a Signal Integrity Department
Appendix B. Calculation of Loss Slope
Appendix C. Two-Port Analysis
Appendix D. Accuracy of Pi Model
Appendix E. erf( )