Fig. 1. Structure of dual-spiral BPFL

Fig. 2. Distribution of static E-field

Fig. 3. Schematic of EM/circuit co-simulation

Fig. 4. Typical output pulse of dual-spiral BPFL

Fig. 5. Transient E-field distribution of dual-spiral BPFL at different points in Fig.4

Fig. 6. Schematic diagram of traveling wave transmission in spiral BPFL during charging

Fig. 7. Effect ofN_m on the output pulse (N_i=7, L=120 nH)

Fig. 8. Effect of N_i on the output pulse (N_m=3, L=120 nH)

Fig. 9. Transient E-field distribution of dual-spiral BPFL during the rising edge (N_i=1)

Fig. 10. Effect of switching inductance on the output pulse (N_m=3, N_i=7)

Fig. 11. Structure diagram of experimental device

Fig. 12. Breakdown of insulator 1 and improved measure

Fig. 13. 100 successive experimental waveforms at PRF of 10 Hz (blue waveform is the output voltage, light blue is the charging voltage, and yellow is the trigger signal)

Fig. 14. Experimental waveform and simulated output pulse