Integrated Detector for the Measurement of Transient Electromagnetic Disturbances

An electrical equipment could face in practice multiple possible transient electromagnetic disturbance sources. To monitor and help in defending the disturbance signals generated by multiple potential sources, a 3-antenna-integrated detector for the measurement of transient electromagnetic fields is developed, which can measure the pulsed E-field and H-field caused by lightning, very fast transient overvoltages (VFTOs) and intentional electromagnetic interference (IEMI), simultaneously. The measuring antennas, i.e., the electrically small rod antenna, the B-dot antenna and the D-dot antenna, are all designed based on existing theoretical analysis. Numerical simulation methods are then used to determine the time and the frequency domain performance of the multi-unit detector. The results obtained indicate the proposed detector can indeed monitor pulsed E-field and H-field caused by lightning or VFTO as well as IEMI signals up to a frequency of 5.13 GHz.