Learning Forum

[ss135]

Hi All,

I've assigned following voltage to my PCB imported in HFSS solver. While analyzing, it showed error "No excitation are defined". Do I need to define 't' ? If yes, how to do that?

I've observed one more thing, since this voltage is a time dependent one, how can evaluated value come out to be exact values when t is not defined at any instant?

[Takeshi Itadani]

First, is the variable t defined as a Local Variable in the Design Properties? If not, the variable t will be undefined and an error will occur.

 

Also, are you performing a Transient analysis? HFSS cannot perform time-domain analysis if it is not a Transient analysis, and in a Transient analysis, the variable representing time is reserved as Time in the Intrinsic Variables.

 

Normally, when using an arbitrary time waveform as the excitation source in HFSS Transient analysis, the correct procedure is to select Transient in Solution Type, Composite Excitation in Options, and then select Dataset to represent the time waveform as the excitation source.