HFSS example of rectangular waveguide coupler

I am designing a 4-port rectangular waveguide coupler using HFSS package. I am a beginner in HFSS, can anyone give me an example of a rectangular waveguide coupler? Thank you....

There are some examples in the “Get started" document of the HFSS9.2 example.

you may also wan to search through the forum for the HFSS design guide. It helps to kick start the simulation.