Amplitude and phase of rectangular waveguide from CST MWS into Matlab

hi everyone, i am very one to CST MWS .. i already design the rectangular waveguide .But the problem is that i dont really know how to export the Amplitude and phase of the rectangular waveguide. I need to design a folded reflectarray antenna . Other problem is that, how can i load ASCII file of CST MWS ( value of amplitude and phase ) into the Matlab program. thank you.

here i attached the waveguide that i've made.
rec waveguide.rar

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