Accession Number : AD0283573

Title :   THE EFFECT OF THE SECONDARY ELECTRON SHEATH ON RADAR RETURN

Corporate Author : GENERAL DYNAMICS/POMONA CALIF

Personal Author(s) : ABRAMOFF,R. ; KRITZ,A.

Report Date : FEB 1962

Pagination or Media Count : 1

Abstract : Shaping and coating techniques currently appear to be capable of reducing the back scatter cross section of a missile in the fron shea h bou a missile. It is shown that for an inciden wave in th freque cy range 1,000 to 100,000 mc plasma sheaths having electron densities as high as 10 to the 8th power el/cc are not capable of produci g suffici nt lectro g etic scattering to enhance the radar return. Thus e e bout h u ncy range of most conventional radars. Since it is believed th t ionospheric missile phenomena may enhance radar retur , calculations ere made to ev luate the significance of an elec ron shea h bou a missile. It is shown that for an inciden wave in th freque cy range 1,000 to 100,000 mc plasma sheaths having electron densities as high as 10 to the 8th power el/cc are not capable of produci g suffici nt lectro g etic scattering to enhance the radar return. Thus e e bout h pe of a cone does not produce a blu ting effect ic is necessary in order to eliminate the reduction in cross section that is obtained by shaping. The radar cross section of e m tal sphere pl a h at combina ion is calculated in the 10 - 200 mc range. It is een that the eff ct of he plasm sheath is most significant in the frequency range wh re r sonant sc t ring i important. (Author)

Descriptors :   *ANTIAIRCRAFT DEFENSE SYSTEMS, *PLASMAS(PHYSICS), *RADAR CROSS SECTIONS, BESSEL FUNCTIONS, DENSITY, ELECTROMAGNETIC WAVE REFLECTIONS, IONOSPHERIC PROPAGATION, RADAR REFLECTIONS, RADAR TARGETS, SCATTERING, SPHERES

Distribution Statement : APPROVED FOR PUBLIC RELEASE