Smart chaff

Communications: directive radio wave systems and devices (e.g. – Radar reflector – Chaff

Reexamination Certificate

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Reexamination Certificate

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07369081

ABSTRACT:
A chaff element for interfering with radar signals. The chaff element has a dielectric substrate and a pair of elongate electrically conductive elements, having a total length of approximately one-half wavelength of the radar signals or otherwise tuned to the radar signals, disposed on the dielectric substrate. A switch is arranged to electrically couple the pair of elongate elements together in response to a control signal generated by an oscillator circuit and a battery. The chaff element can be used in a method of providing a countermeasure against radar signals. A plurality of chaff elements can be deployed in an airspace above a radar unit emitting a radar signal and interfere with the radar signal by opening and closing the switches of the chaff elements while deployed in said airspace above the radar unit.

REFERENCES:
patent: 4644864 (1987-02-01), Komorowski et al.
patent: 5369408 (1994-11-01), Tsui et al.
patent: 6017628 (2000-01-01), Stevens et al.
patent: 6429800 (2002-08-01), Richmond
patent: 6456225 (2002-09-01), Forster
patent: 6513438 (2003-02-01), Fegg et al.
patent: 6628239 (2003-09-01), Hilliard et al.
patent: 2082862 (1982-03-01), None
patent: 09210597 (1997-08-01), None

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