Accession Number : AD0719739

Title :   Radiation from Circumferential Slots on Plasma-Clad Cones.

Descriptive Note : Rept. for Jan-Oct 70,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Stewart,Gordon E. ; Golden,Kurt E. ; Pridmore-Brown,David C.

Report Date : 26 FEB 1971

Pagination or Media Count : 37

Abstract : The radiation pattern distortion produced by a high-altitude, boundary-layer plasma is investigated for both symmetically and asymmetrically excited circumferential slot antennas on models of conical reentry vehicles that use an electric discharge simulation of the sheath. The slot configurations are selected to conform to nose-mounted telemetry antennas in current use, and the peak electron densities and electron density profiles are selected to approximate high-altitude reentry conditions. Measured patterns and theoretical predictions are compared for both bare and plasma-clad cones. These indicate large modifications of the radiation pattern in the forward direction, even for relatively thin and underdense plasmas. (Author)

Descriptors :   (*SLOT ANTENNAS, *PLASMA SHEATHS), ANTENNA RADIATION PATTERNS, REENTRY VEHICLES, TELEMETERING ANTENNAS, CONICAL BODIES

Subject Categories : Electrical and Electronic Equipment
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE