This paper presents a novel electric field measurement system utilizing opt
ical technology, which has been developed, tested, and calibrated for the n
ear-field measurement in the frequency range up to 1.8 GHz. The measuring p
robe is passive, all-dielectric, electromagnetic interference (EMI)-immune,
and provides the information on the field strength, frequency, and phase.
The achieved measurement resolution and minimum measurable fields were 10 V
/m, with a spatial resolution of 10 mm, A finite-difference time-domain (FD
TD) algorithm for solving Maxwell's equation was used to assess the field p
erturbation by the presence of the measuring probe and the suitability for
the near-field measurement.