How can I simulate the below circuit to show its transmission coefficient?

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I have developed the circuit as in the diagram but what is missing to view the transmission coefficient?


1 Answer 1


In ADS, you'll need to either

  • Get rid of the Port objects and connect a signal source and termination to the two ends of the trace. In recent versions of ADS, there is one Term object type that is used for both the stimulus and termination in S-parameter simulations.


  • Make a higher level schematic with a signal source and termination, that connects to an instantiation of this subcircuit as a 2-port.


  • Add a simulation object to the schematic. You probably want an S_Param simulation object.

  • Click the "Simulate" button.

  • Graph the S(2,1) output data to get the transmission coefficient.

  • \$\begingroup\$ I have added a termination in place of the ports without adding any signal source and it has worked fine , so is this correct ? \$\endgroup\$
    – John adams
    Commented Apr 9, 2019 at 21:30
  • \$\begingroup\$ Yes, in an S-parameter simulation, the termination (if you use a Term object instead of just a resistor) is both a termination and a signal source. \$\endgroup\$
    – The Photon
    Commented Apr 9, 2019 at 21:35
  • \$\begingroup\$ Thank you very much \$\endgroup\$
    – John adams
    Commented Apr 9, 2019 at 21:37

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