REFLECTOR ANTENNA ZOOM TECHNIQUES.
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1967
- Accession Number
- AD0821090
Entities
People
- George E. Skahill
- Walter I. Satre Jr