Once you've defined the far field monitor in CST and run the simulation, you'll be able to consult all the far field results in the drop down list of a far field result folder. Depending on the orientation of your antenna, phi and theta cut planes will give you co and cross polar rad pats. It is possible to plot (1D Polar and cartesian) constant theta/ constant phi plots at a specific phi/theta. Or else a 2D/3D visualisation is possible.
It is very simple...in order to check for the E-H plane radiation pattern, select 2D/3D plots and go to enable theta/phi option.then set the values for theeta and phi according to the orientation and feed network of your deisgn.
Before checking the results for E-H radiation you should check for the proper feeding direction/orientation of antenna.
In far field properties tree set coordinate system as a Ludwig 3.After applying the setting the ,the far field folder of any mentioned frequencies contains Ludwig 3 vertical and Ludwig 3 Horizontal polar plots for both co and cross polarization radiation patterns
Right-click on the far-field folder, select Farfield plot properties and under the coordinate system , scroll down to Ludwig 3, then click on apply and see the following:
Ludwig 3 Horizontal = Cross -Polarization
Ludwig 3 Vertical = Co- Polarization
Hope it helps.
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