High-power microwave electromagnetic pulse protection device

The utility model discloses a high-power microwave electromagnetic pulse protection device, which comprises three groups of resonance circuits arranged on a medium substrate, and the three groups of resonance circuits comprise a first-stage resonance circuit, a second-stage resonance circuit and a third-stage resonance circuit of which the resonance frequencies are from high to low. The first-stage resonance circuit and the second-stage resonance circuit are connected through a microstrip line b, the second-stage resonance circuit and the third-stage resonance circuit are connected through a microstrip line c, a microstrip line a and a microstrip line d are further arranged on the dielectric substrate, one end of the microstrip line a is connected with a signal input end, the other end of the microstrip line a is connected with the first-stage resonance circuit, and the other end of the microstrip line d is connected with the third-stage resonance circuit. And one end of the microstrip line d is connected wit