Can HFSS Transient Simulation Takes Arbitrary Excitation Waveform?

- August 12, 2021 at 5:58 pm
  
  hiuyung.wong
  Subscriber
  
  Dear all,
  HFSS transient simulation can take broadband pulse and TDR as excitation. I would like to do the transient with arbitrary waveform. How to do this? Thanks a lot!
- August 18, 2021 at 2:05 pm
  
  Dan Dvorscak
  Ansys Employee
  
  In order to use arbitrary time domain excitations, in the solution type settings, switch from Network Analysis to Composite Excitation.
  When you do that, you no longer set the input signal in the analysis setup, but individually for each excitation.
  Note, datasets have to be pre-defined in the project prior to assigning them in this form. Please see the standard example named "TransientGeoRadar" which has these datasets pre-defined and available to use once composite excitations have been selected.
- September 7, 2021 at 6:04 am
  
  hiuyung.wong
  Subscriber
  
  Dear ddvorsca Thanks a lot! It works but I ran into another problem. With Netwrok Analysis, I can plot S11, S21, S12 and S22. But with Composite Excitation, I can only plot S11 and S22 (the name is "output(XX)"). Is it possible to plot S12 and S21? My goal is to see how the pulse changes when it is emitted from another terminal. If HFSS cannot do that, do you have any suggestion how to do it? Should I export the matrix and calculate in other tools e.g. Matlab? Thanks a lot!