First field scans with the probe array

The probe array completed its first full scan of a planar coil’s near field. The positioning stage steps through a grid of points, dwells at each for a fixed integration time, and records the induced voltage from the loop probe.

The raw data is noisy — cable resonances and ground loops are still a problem at the higher frequencies. After a simple moving-average filter the field shape matches what the Biot-Savart calculation predicts for the coil geometry. Peak field is in the right place and falls off at roughly the right rate.

Next step is to characterize the noise floor and figure out whether shielding the probe cable or switching to a differential measurement helps more.