Study and design of a cylindrical lens array antenna for wideband electronic scanning
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.
- Publication:
-
Interim Report
- Pub Date:
- December 1983
- Bibcode:
- 1983hazc.rept.....H
- Keywords:
-
- Amplitudes;
- Antenna Arrays;
- Cylindrical Antennas;
- Elevation;
- Lens Antennas;
- Signal Distortion;
- Angles (Geometry);
- Axes (Reference Lines);
- Axes Of Rotation;
- Broadband;
- Cylindrical Bodies;
- Diffraction;
- Dimensions;
- Earth Axis;
- Incidence;
- Level (Quantity);
- Scanners;
- Sidelobes;
- Communications and Radar