Sinusoidal FM Fuze's Channel Leak and Its Jamming Mechanism 

Aim To get the theory base of designing FM fuze's jamming signal; its jamming mechanism was studied. Methods A sinusoidal FM fuze was analyzed in time domain and frequency domain and the concept of channel leak was presented. Results It was proved that information channel leak exists in FM fuze because of the nonlinear property of the mixer. The jamming signal was designed based on the channel leak and the jamming mechanism was analyzed in detail. Conclusion This kind of jamming signal can jam the sinusoidal FM fuzes effectively just depending on the jamming signal's feature itself. It's different from the traditional jamming way of simulating echo. Though the sinusoidal FM fuze was just analyzed; the principle is applicable to all FM fuzes. At the same time; it may be used as the reference for FM radar and communication countermeasures.