Combined Microwave and Infrared Chaff.
Patent, Filed 30 May 78, patented 17 Sep 91,
DEPARTMENT OF THE NAVY WASHINGTON DC
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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.
- Radar Countermeasures