Resonance-suppressed magnetic field probe for EM field-mapping system

A novel rectangular magnetic field probe is proposed, and calculated and measured results are presented. The proposed probe effectively suppresses the emission/reception of electromagnetic fields from the edge of the ground plane and, as a result, the usable frequency range of the probe is enhanced compared with that of the conventional one. In order to verify the performance of the probe, measured magnitude and phase of the magnetic field with an H_xy probe are presented from 1 to 7 GHz for two different geometries: microstrip line and bandpass filter for ultrawide-band application. The measurement results agree very well with theoretically predicted field distributions, showing its excellent performances.