Accession Number : AD0275599

Title :   A STUDY OF THE NEAR FIELD BEHIND A PARABOLIC ANTENNA

Corporate Author : NAVAL WEAPONS LAB DAHLGREN VA

Personal Author(s) : LYSHER,LEON J.

Report Date : 15 MAY 1962

Pagination or Media Count : 1

Abstract : The near-field behind a p rabolic antenna is nalyzed using the geometrical theory of diffraction. Equations are developed to calculate t e fi ld behind an ant nna of arbi rary size, focal length and aperture field distribution. These equations are then applied to a particular antenna. The results are then compared with the measured field; it is found that there is a good AGR EM N AT ANGL S UP TO 70 DEGREES FROM THE AXIS OF SYMM TRY. ( UT OR

Descriptors :   *ELECTROMAGNETIC FIELDS, *PARABOLIC ANTENNAS, *RADIATION HAZARDS, ANTENNA FEEDS, ANTENNA LOBES, ANTENNA RADIATION PATTERNS, ANTENNAS, ELECTROMAGNETIC PROPERTIES, ELECTROMAGNETIC RADIATION, HAZARDS, MATHEMATICAL ANALYSIS, ORDNANCE, RADIATION EFFECTS, WAVEGUIDES

Distribution Statement : APPROVED FOR PUBLIC RELEASE