Microwave heating model with multiple frequencies

Hi,

With the Microwave heating model, with a frequency-transient study is possible to simulate multiple frequencies in a well defined bandwidth? I have a input wave with a fixed bandwidth defined by a square function or a gaussian pdf.

I could do this with a time domain study, with the transient electromagnetic wave model. Bit if it is possible with the microwave heating model, this will be more apreciated.

Thanks in advance.