INVESTIGATION OF METHODS OF SCANNING THE BEAM OF LARGE ANTENNAS
Abstract
The study on wire-grid HF lens antennas is a new research topic that shows great promise. A theoretical and experimental investigation is presented of the properties of a wire grid placed above a ground plane. A general theoretical investigation on a radial horn with arbitrarily variable flare angle showed that the connection of a radial horn to the rim of a circular lens had a very minor effect upon the ideal radiation pattern of the lens, and that the reflection at the rim of the lens was also very small. A new type of electrically variable phase shifter was analyzed and demonstrated experimentally. Items also investigated included: (1) mutual coupling effects in scanning antenna arrays, (2) reduction of the number of elements in an array, (3) a corrected line source feed for a spherical reflector, (4) the compound interferometer as a possible radar antenna, (5) linear arrays with unequal element spacing, (6) a toroidal-band line-source scanner, (7) various types of electronic phase shifters, and (8) lownoise parametric amplifi55 . (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1961
- Accession Number
- AD0256883
Entities
People
- M.g. Andreasen
- P.s. Jr. Carter
- W.f. Gabriel
Organizations
- SRI International