Accession Number : AD0807443

Title :   REFLECTOR ANTENNA ZOOM TECHNIQUES.

Descriptive Note : Quarterly technical rept. no. 1, 23 Jun-23 Sep 66,

Corporate Author : GENERAL ELECTRIC CO SYRACUSE NY HEAVY MILITARY ELECTRONIC SYSTEMS

Personal Author(s) : Manwarren, T. E.

Report Date : JAN 1967

Pagination or Media Count : 36

Abstract : The objective of this program is to provide an antenna design with a Zoom (variable beamwidth) capability with smooth continuous zoom action on transmit, multiple beam or monopulse beams on receive, and beam scanning over a limited angular range, while maintaining good beam characteristics. A computer program was written and used for calculation of far-field patterns in sin theta and theta space and contour plots in sin theta space. Subroutines are included in the program for a wide choice in aperture illumination -- both amplitude and phase. An analytical investigation of the ring array factor in infinite series form was completed and the results used as a tool in designing an aperture grid with low grating lobes. The theoretical limits of side lobe level as a function of the number of elements in the array were investigated, and the statistical results used as a criterion for evaluating the grids under study here, as well as those of some previous workers.

Descriptors :   *ANTENNA ARRAYS), (*RADAR ANTENNAS, COMPUTER PROGRAMS, ANTENNA RADIATION PATTERNS, SUBROUTINES, ANTENNA APERTURES, ANTENNA LOBES, S BAND, ULTRAHIGH FREQUENCY, L BAND, EQUATIONS, MATHEMATICAL ANALYSIS.

Subject Categories : Electrical and Electronic Equipment
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE