Accession Number : ADA138808
Title : Study and Design of a Cylindrical Lens Array Antenna for Wideband Electronic Scanning.
Descriptive Note : Interim rept. Oct 80-Apr 82,
Corporate Author : HAZELTINE CORP GREENLAWN NY
Personal Author(s) : Hannan,P W ; Newman,E M
PDF Url : ADA138808
Report Date : Dec 1983
Pagination or Media Count : 188
Abstract : This Interim Report presents the results of studies leading to the design of a cylindrical lens-array antenna for two-dimensional electronic scanning when the signal has a wide instantaneous bandwidth. The constant-path cylindrical lens defined by Rotman and Franchi is studied for contours, phase aberrations, amplitude distortions, and surface incidence angles. One form of this lens is the R-2R lens, which is chosen for this project. Design of the antenna for low sidelobes is considered. In azimuth, when the beam is scanned off the antenna axis the sidelobes are affected by the curvature of the lens outer surface. In elevation, the sidelobes are affected by feed/lens diffraction. Performance of the electronic-scan antenna with a wideband signal is a function of the number of line feeds that are used to illuminate the cylindrical lens.
Descriptors : *Antenna arrays, *Lens antennas, *Sidelobes, *Electronic scanners, Cylindrical antennas, Cylindrical bodies, Lenses, Diffraction, Angle of incidence, Low level, Signals, Distortion, Two dimensional, Broadband, Feeding, Axes, Surfaces, External, Elevation, Amplitude
Subject Categories : Electrical and Electronic Equipment
Radiofrequency Wave Propagation
Distribution Statement : APPROVED FOR PUBLIC RELEASE