Microweave frequency function with temperature

Hi I am studying an microwave problem in frequency domain, where the frequency of the waveguide problem needs to change during the simulation.

I successufly, made one simulation by definying a frequency in function of the physical time "t".

I need to make the same frequency function but depending of the sample temperature, can be from one temperature probe or the average temperature in the sample.

Has anyone experience in this?

Thanks in advance.