Fig. 1. Coupling pathways for electromagnetic attacks entering electronic devices

Fig. 2. Two types of solid-state semiconductor limiters^[13-14]

Fig. 3. Simulation results of bandpass filter protection against nuclear electromagnetic pulses

Fig. 4. Limiting filter and its time-domain response waveforms

Fig. 5. Schematic diagram of energy selective surface

Fig. 6. Two types of ultra wideband energy selective protection structures^[38，56]

Fig. 7. Strong electromagnetic pulse protective radome for Beidou navigation receiver

Fig. 8. Front and back doors integrated protection method of electronic information equipment

Fig. 9. Field-circuit integrated protection method for transmitting and receiving RF channels