Accession Number : AD0821090

Title :   REFLECTOR ANTENNA ZOOM TECHNIQUES.

Descriptive Note : Final rept. 22 Mar 66-22 Jun 67,

Corporate Author : AIRBORNE INSTRUMENTS LAB DEER PARK NY

Personal Author(s) : Skahill, George E. ; Satre, Walter I., Jr

Report Date : SEP 1967

Pagination or Media Count : 90

Abstract : This report describes a study and investigation of a reflector antenna system that provides zoom (variable beamwidth) and scan capability using controlled-aperture amplitude and phase. The antenna system is called a hybrid system since it uses a secondary phasor as both a lens and a reflectarray. The secondary phasor operates as a lens in conjunction with one feed for scanning in the receive mode and as a reflector in conjunction with another feed for zooming in the transmit mode. Switching between a zooming transmit mode and a scanning receive mode results in a versatile radar antenna with an inherent duplexing capability. Analysis of this system by digital computer to determine the optimum geometrical configuration is discussed. Component design of the elements, phase shifters, drivers, and beamsteering unit for the secondary phasor are also discussed particularly for operation at S-band. Considerations for scaling the system to UHF are presented. (Author)

Descriptors :   *RADAR ANTENNAS), (*PHASED ARRAYS, RADAR SCANNING), (*PARABOLIC ANTENNAS, ANTENNA APERTURES, ANTENNA FEEDS, RADAR DUPLEXERS, PHASE SHIFT CIRCUITS, S BAND, ULTRAHIGH FREQUENCY, VERY HIGH FREQUENCY, BANDWIDTH, LENS ANTENNAS.

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE