Fig. 1. Schematic diagram of electric field sensor structure

Fig. 2. Schematic diagram of sensor system

Fig. 3. (a) Diagram of Comsol simulation structure; (b) Distribution of electric field intensity

Fig. 4. Simulation of electric field intensity inside crystal

Fig. 5. Photograph of the sensor coupling

Fig. 6. Photo of power frequency electric field test platform

Fig. 7. Output waveform of sensor at 57.143 kV/m

Fig. 8. Input and output characteristics of the sensor