Overlapped Sub-Array Scanning Antenna Study
Abstract
This report refers to an investigation of new phased array techniques using overlapping multiple beam elements. It is shown that this technique, can be applied to a wide variety of electronically scanned system requirements. Two designs, one for limited scan and the other for wide angle scan with a minimum number of elements and phase shifters were selected for the reported computer analysis. The results indicate extremely low sidelobe levels over most of the angular sector while limiting the close-in sidelobes to no more than -20 dB and grating lobe levels to peak values of about -14 dB for some scan locations. The limited scan design utilizes 18 eight-port Bulter matrices, 18 phase shifters, and 9 SP2T switches to achieve 20 BW's of a + or - 10 deg. scan. The wide-angle design provides 90 BW's of scan + or - 45 deg.) with 26 eight-port matrix elements, 26 phase shifters and 26 SP4T switches. The analysis of the new scan array technique indicates that the array performance can be further improved at the cost of additional elements and element complexity.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1979
- Accession Number
- ADA070939
Entities
People
- G. Ploussios