Probe correction in Spherical Near Field (SNF) measurements is typically performed during the NF/FF transformation.
This requirement leads to challenging probe designs, especially if the required bandwidth is wide. For this reason, in many practical cases, higher order spherical modes can be radiated.
In this paper, the source of higher order spherical modes of the MVI SP1100 probe is investigated using INSIGHT software which reconstructs equivalent currents starting from the measured NF. Knowledge of these sources are useful to improve future probe designs.