Hybrid PCB Rogowski Coil for Measurement of Nanosecond-Risetime Pulsed Current

Self-integrating Rogowski coil has been widely used for measurements of pulsed currents from nanosecond timescale to microsecond timescale in pulsed power systems. Appropriate designs of coil´s structure are vital to high-frequency response. This paper proposed a new structure of Rogowski coil so as to provide a better response to fast pulsed current. Four Rogowski coils with different structures were tested in three different platforms. Experimental results showed that the hybrid Printed Circuit Board Rogowski coil had the best performance in this paper, which could respond to square waves with fronts of $sim 2$ ns and had a sensitivity of 0.585 V/kA. The designed maximal peak current was 100 kA.