Well, waveguide adapter model mode is not sufficient in transient analysis in which you have to define the field variables manually. But the beginning steps are the same, first mode analysis, then set manual value of propagation constant, and finally store solution in solver manager.
Now incorporating this result finally in the transient analysis module can be done rather easily by selecting scattering boundary condition. Doing mode analysis on the same boundary for the sake of simplicity, just write
Ex: real(tEx_rfwb*exp(i*w0*t))
Ey: real(tEy_rfwb*exp(i*w0*t))
Ez: real(En_rfwb*exp(i*w0*t))
Note that for above statements to be exact, x-y plane must be parallel to your boundary/waveguide cross-section. Then the z-component would be field component normal to the boundary as I have written. Also make sure that frequency w0 is defined already.
And I don't think it would be so straightforward to export solution from Matlab back to Comsol
Now incorporating this result finally in the transient analysis module can be done rather easily by selecting scattering boundary condition. Doing mode analysis on the same boundary for the sake of simplicity, just write
Ex: real(tEx_rfwb*exp(i*w0*t))
Ey: real(tEy_rfwb*exp(i*w0*t))
Ez: real(En_rfwb*exp(i*w0*t))
Note that for above statements to be exact, x-y plane must be parallel to your boundary/waveguide cross-section. Then the z-component would be field component normal to the boundary as I have written. Also make sure that frequency w0 is defined already.
And I don't think it would be so straightforward to export solution from Matlab back to Comsol