When I do the evaluation in postprocessing I get the error-
Template based post-processing result "Gain (IEEE),3D,Max. Value (Solid Angle)": Error in calling "Evaluate1D" function (No calculated Farfield Result with correct excitation string found.)
1. Define the field monitors in the monitor window with the frequency points or transient broadband as required frequency range----> simulate
2. Open template based postprocessing window------> farfield and antenna properties----->farfield result--------->all settings---> set plot mode to Gain(IEEE)/realized gain---> frequency setting to broadband----->evaluation range as required---->OK------> Evaluate.
You will get the gain v/s frequency plot in specified frequency range.
Firstly, to see the Results and chose Template Based Postprocessing and apply Farfield and Antenna Properties and Farfield Result and than like on the pic. And after that, it`s possible to get plot like on next picture, for instance. Set up a post processing template to pull out the directivity as a function of frequency, it's a 1D template.