Chaff material for scattering electromagnetic radiation used in aircraft as a protective measure against guided missiles consists of conducting fibers

• Main Authors: DOCHNAHL, AXEL, KOCH, ERNSTRISTIAN
• Format: Patent
• Language: English; German
• Published: 14.08.2002
• Edition: 7
• Subjects: ANTENNAS, i.e. RADIO AERIALS; BASIC ELECTRIC ELEMENTS; ELECTRICITY

Chaff material for scattering electromagnetic radiation in the region of 0.1-1000 GHz (wavelength lambda 3 m - 3 mm) consists of conducting fibers having a ratio of fiber radius r to wavelength lambda of not more than 10->3> and a ratio of fiber length L to fiber diameter D of at least 100. Preferred Features: The fiber material is made from carbon or conducting metallic fibers or has a conducting metallic coating, preferably made from nickel, tungsten, iron, aluminum or silver. The fibers are coated with a metal layer which is applied using a CVD, especially a MOCVD process. Düppel sollen eine breitbandige Wirkung über den gesamten Radarfrequenzbereich von 0,1-1000 GHz zeigen. Die Düppel bestehen aus einem einheitlichen Material in Form von leitfähigen oder nichtleitenden Fasern mit einer leitfähigen Beschichtung.