Hi.. I want to compute the far-field radiation of an antenna for a minimal scan angle range, say from -4Deg to +4Deg, so that I could reduce the step size and increase the accuracy of my calculations. By default, CST Studio Suite  calculates the far-field from -180 to +180 degrees. Even if, in the 2D/3D results window, I change the range from, say, -4 to +4 degrees, the accuracy won't be improved. That is where the problem occurs. I want to compute for a minimal range of antenna scans to reduce my step size and get more accurate results. My problem is when I am enclosing my antenna with a radome, the difference between the radiation patterns with and without a radome provides me the boresight error, which comes in, say, 2 degrees or sometimes 7 degrees, which is too large if you look at practicality and all. I want the boresight error in milliradians, which is difficult to achieve if my antenna scans from -180 to 180 at a step width of 10 degrees. 

In the far-field cuts, if I provide a step-width of 0.1 for, say, Phi=0 cut plane, is it possible? Is there a way to overcome this problem? Is it possible in post-processing or something? Please let me know.  Any input or some idea is most welcome since I am stuck in this problem. Thank you.