Accession Number : AD0828296

Title :   AN EXPERIMENTAL MICROWAVE IMAGING SYSTEM USING PREFORMED BEAMS.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Litten, Robert Allan

Report Date : SEP 1967

Pagination or Media Count : 56

Abstract : An experimental investigation of microwave imaging using preformed beams is made at a frequency of 24 gigahertz (wavelength 1.25 cm). The apparatus consists of a 1.5 meter diameter parabolic reflector with a mosaic of deectors at the focal plane. The detector outputs are amplified and stored to provide a set of d.c. voltages, proportional to the energy received at points in the image plane, to be applied to an intensity modulated display. Using microwave antenna and optical principles, the theory of image formation and resolution is discussed. using measured parameters. Advantages of the system with respect to conventional scanning radar appear for fast moving objects at close range. (Author)

Descriptors :   (*MICROWAVES, IMAGES), (*BEAMS(ELECTROMAGNETIC), MICROWAVES), REFLECTORS, PARABOLIC BODIES, NETWORKS, DETECTORS, FEEDBACK AMPLIFIERS, INTEGRATED CIRCUITS, WAVEGUIDES, PHASE, DIFFRACTION, KLYSTRONS, SEMICONDUCTOR DIODES, RESOLUTION, RADAR SCANNING, THESES.

Subject Categories : Active & Passive Radar Detection & Equipment
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE