"RESONANCESCATTER30

Deutsche Aerospace, Bremen anechoic chamber measurements of a faceted, metallized 1:10 scale model of an F-117 aircraft:
“The aircraft geometry was obtained from open literature and hence the target model does not take into account fine structure details and surface materials such as RAM, which are of less importance at VHF/UHF...

”“The scaled measurement results... show that the attempt to reduce the target’s RCS has been successful in the ±70º section around the nose-on aspect and for the frequency range above 400 MHz.High RCS values covering the whole frequency range occur when the direction of illumination is perpendicular to the front or back edges of the wings or other dominant structures of the fuselage. In the nose-on section, however, an increase in the RCS can be seen at VHF around 100 MHz [6 to10 dBm2] and UHF around 400 MHz [0 to 6 dBm2 , > 6 dBm2nose on] due to resonance effects. Hence, such stealth techniques can be efficient at high radar frequencies but are ineffective at VHF/UHF"

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Attached Files shemaF117obaranja.jpgf-117 model test.JPG
Last edited by piston79; 12/18/17 07:16 PM.