Accession Number:

AD0436821

Title:

AN EXPERIMENTAL DETERMINATION OF ANTENNA PATTERN DISTORTION DUE TO A PLASMA LAYER,

Descriptive Note:

Corporate Author:

AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s):

Report Date:

1964-01-01

Pagination or Media Count:

11.0

Abstract:

Measured radiation patterns of a plasma-covered antenna are compared with an approximate leaky wave analysis due to Oliner and Tamir. The results clearly show a shift in the optics critical angle and the appearance of several side lobes are predicted by theory. The plasma is produced in a He - Xe admixture at 0.4 torr by a capacitively-coupled 10-Mcps cw source and contained in a rectangular pyrex vessel of interior dimensions 8 in. by 4 in. by 5 in. Electron densities in excess of 5 x 10 to the 11th power per cc are measured by a standard microwave interferometer by manually balancing a bridge or automatically by displaying a set of interference fringes after a pattern is recorded. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE