Accession Number : ADD005566

Title :   Proximity Fuze Jammer.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Personal Author(s) : Marinaccio,Richard E ; Meier,Ward M

Report Date : 17 Oct 1978

Pagination or Media Count : 4

Abstract : This patent describes a system for jamming continuous wave radar type proximity fuzes used on surface-to-air missiles where the fuze requires an increase in return signal power level and a rapid frequency change for detonation. The system basically includes a receiver, amplifier, and transmitter. A received fuze signal is filtered and square wave modulated then sent to a first traveling wave tube for amplification. The signal is then amplified again by a second traveling wave tube which is modulated by a transit time modulator which continuously varies the phase shift through the tube in a linear fashion. The linear variation in phase shift is the equivalent of a displacement in the frequency signal being amplified. The signal is then reradiated to the missile giving the fuze a target sensing causing it to predetonate.

Descriptors :   *Patents, *Proximity fuzes, *Radio jamming, Jamming, Pin diodes, Traveling wave tubes, Modulators, Pulse modulation

Subject Categories : Radio Countermeasures
      Ammunition and Explosives

Distribution Statement : APPROVED FOR PUBLIC RELEASE