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,


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