REFLECTOR ANTENNA ZOOM TECHNIQUES.
Abstract
Techniques were developed for designing and evaluating pseudo-random grids of large elements for multiple ring planar arrays, and a pseudo-random grid was designed specifically for the goals of this program. Aperture illumination contours for sum, difference and 'zoom' beam modes were studied and functions selected which are suitable for ring arrays. A constrained feed system concept was developed specifically for illuminating ring arrays and in which the three beam modes can be accurately controlled in separate beamforming networks. A study of large aperture elements was made and several suitable elements fabricated and tested. Finally, an error analysis was made, an error budget formed, and the general array approach was found to meet the original design goals in the presence of realistic errors in the feed system and aperture. Evaluation was accomplished using computed radiation patterns, tracking error and gain as criteria. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1967
- Accession Number
- AD0824237
Entities
People
- A. Farrar
- T. E. Manwarren
Organizations
- General Electric