Hi kristal,
to see the axial ratio in CST, you should look at "Farfields" section in the simulated results... there should be a drop down list after simulating the design.
if you click on that drop down list you should be able to see the axial ratio plot...
The default plot is in 3D format, if you want to plot it on polar form, you need to right click on a farfield result and select "Far field plot properties", In the "General" tab select "polar" for the "plot type" and choose the values for "Theta" & "Phi" according to the orientation of your design. Then select "apply" to see the results
regards,
per_lube