Discussion Forum

Hi,

I am working on modeling office corridors as waveguides. I have a waveguide model for a corridor of approximately 2 meter wide. The source is a point source sending at a frequency of 2.44 GHz, the model is done analytically in a straight corridor with PEC walls which is very easy. The main problem here is that a lot of modes will propagate due to the short wavelength and the wide corridor. (It’s all in 2D by the way)

Now I am trying to use Comsol to calculate numerically how the mode coefficients couples across a 90 degree bend in the corridor. I have looked at the "H bend Waveguide with S-parameters" example in the manual and was thinking about doing the same thing but in this case the corner is like the corner of a normal office building.

The problem I have is how to excite a port with more than one mode. What I want is to calculate the S parameters between the different modes and how they couple into each other across the corridor bend.

I have been using the "In Plane TE waves" application mode from the RF module. From my analytical calculations I have found that 16 modes propagate along the corridor at the frequency 2.44 GHz. So I want to excite a port with these 16 modes. Anyone know how I can do that??