Research on the damage mechanism of typical radio fuze induced by narrow band HPM

In order to systematically analysis the damage mechanism of typical radio fuze caused by narrow band high power microwave (NB-HPM), we developed an standard experiment system. Through several rounds fuze experiments form L band to X band, the threshold value, sensitive parameters and main energy coupled channel are defined. By full wave simulation and coupling testing at key points, the key sensitive components is identified. Finally, the damage mechanism is explained by the multiple physical field simulation. All the above work shows that unlike the ultra-band HPM, cannonball body is not the main coupling channel and the silicon controlled rectifier (SCR) would not miss-working by the voltage fluctuation of the commonality ground. Antenna is the main coupling path of typical radio fuze for narrow band HPM from L band to X band. Oscillation tube of RF circuit is the key vulnerable part. The main damage mechanism is heat accumulation in p-n junction and the main effects is miss-fire of fuze.