Accession Number : ADD015088

Title :   Combined Microwave and Infrared Chaff.

Descriptive Note : Patent, Filed 30 May 78, patented 17 Sep 91,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Woodward, Elmer D

Report Date : 17 Sep 1991

Pagination or Media Count : 4

Abstract : A long, slender thread or filament of a slow burning substance is metallized, by evaporation, cold spraying, or the like, with aluminum, zinc or other similar substance. A short length at one end is not metallized but is provided with means for igniting the filament when the chaff is dispensed. A bundle of these filaments are then packed in an impermeable foil envelope and preferably filled with an inert atmosphere. When dispensed, the cloud of slow-burning filaments perform toward infrared search or tracking devices in a manner analogous to the clutter signal created in radars by conventional chaff. At the same time, the metallic coating on the filament acts as a conventional chaff, giving a capability to interfere with either infrared or microwave devices and devices with a combination of infrared and microwave capabilities.

Descriptors :   ALUMINUM, ATMOSPHERES, CHAFF, CLUTTER, COMBUSTION, ENVELOPE(SPACE), EVAPORATION, FILAMENTS, FOILS(MATERIALS), INFRARED RADIATION, LOW TEMPERATURE, METAL COATINGS, MICROWAVE EQUIPMENT, MICROWAVES, PERMEABILITY, RADAR, RARE GASES, SEARCHING, SIGNALS, SLENDER BODIES, SPRAYS, TRACKING, ZINC

Subject Categories : Radar Countermeasures

Distribution Statement : APPROVED FOR PUBLIC RELEASE