Hello! I just started using COMSOL and I have been working on simulating a microwave wave guide with a dielectric material and been using a static frequency of 8.5 GHz and all my analysis related to that have been done. I now wanted to have an analysis to see the effect of a variable frequency wave generator upon a dielectric material. Basically instead of just putting 8.5 GHz through the wave guide, the microwave generator will put a microwave frequency that varies with time from 8.2 GHz to 12.4 GHz and then back again to 8.2 GHz. The problem is still a Frequency-Transient problem.
Initially I set my frequency (f0) as a parameter with the expression of 8.5[GHz]. I deleted that and instead created a new variable "f0". I also created a new parameter "t = 0[s]" so that COMSOL knows that "t" has been initiated. The new function was a triangle waveform "wv1". The expression for "f0" then becomes "10.3+(2.1*wv1(t[1/s]))[GHz]". However, it seems I'm missing something else as I keep getting an error:
Failed to find consistent initial values.
Last time step is not converged.
How should I proceed. I have read various threads and tried many different ways but I have not succeeded. Perhaps there is a smoother way of approaching this?
Thank you.
Initially I set my frequency (f0) as a parameter with the expression of 8.5[GHz]. I deleted that and instead created a new variable "f0". I also created a new parameter "t = 0[s]" so that COMSOL knows that "t" has been initiated. The new function was a triangle waveform "wv1". The expression for "f0" then becomes "10.3+(2.1*wv1(t[1/s]))[GHz]". However, it seems I'm missing something else as I keep getting an error:
Failed to find consistent initial values.
Last time step is not converged.
How should I proceed. I have read various threads and tried many different ways but I have not succeeded. Perhaps there is a smoother way of approaching this?
Thank you.