To evaluate the anti-electromagnetic pulse（EMP） jamming capability of a certain metric wave radio fuze

we constructed an experiment system for fuze EMP irradiation

and performed experiments under ultra-wide band electromagnetic pulse（UWBEMP）

nuclear electromagnetic pulse（NEMP） and lightning electromagnetic pulse（LEMP） irradiation.Meanwhile

we analyzed the effect rules and failure mechanism.Experimental results show that

in EMP irradiation

the strongest coupling pose is that the setting aperture is toward to the antenna and the bomb body is parallel to the electric field direction.Bomb body is the main energy coupling channel.UWBEMP and NEMP with a certain parameters can make fuze fire

but LEMP can not.The higher the repetition frequency is

the stronger the interference capability of EMP will be.On 70 kV/m field strength of UWBEMP

the firing rate of the repetition frequency in single

10 Hz

20 Hz

and 50 Hz states are 20%

60%

80% and 100%

respectively.Silicon controlled rectifier（SCR） is the sensitivity device of the executive circuit.The failure mechanism of fuze is that the irradiation energy couples to the power in the executive circuit through the bomb body

because the changing rate of the coupling voltage exceeds the critical changing rate of SCR

leading to the miss-action of the fuze.