Full-Wave Three-Dimensional EM Simulation of a Spherical Range to Examine and Optimise the Effectiveness of Mode Filtering Based Post Processing Techniques

This paper extends the authors' prior studies into the use of a very general digital twin of a spherical near-field antenna test system for the careful validation and further optimization of mode filtering-based post processing techniques for scattering suppression. This paper compares and contrasts various measurement configurations and several mode filtering strategies using the results thereof to make recommendations regarding the optimum acquisition strategy and preferred processing methodology. Results are presented and discussed with this paper being the first time that such an extensive and rigorous full-wave three-dimensional computational electromagnetic simulation campaign has been harnessed in this way. This has enabled cylindrical and spherical mode filtering-based scattering suppression techniques to be quantitatively compared, contrasted, and examined.