An electrically steerable array of 968 dipoles for the Ooty radio telescope.
Abstract
An electrically steerable array of 968 dipoles for illuminating the parabolic antenna of the Ooty radio telescope at 327 MHz is described. The array has been divided into 22 modules of 44 dipoles each. Dipoles in each module are fed in series through directional couplers and phase shifters. A simple design of trombone type phase shifters with noncontacting choke joints has been developed that gives a loss of less than 1.2 dB in each module at 327 MHz. The antenna beam can be steered between plus and minus 36 deg in declination.
- Publication:
-
Journal of the Institution of Electronics and Telecommunication Engineers
- Pub Date:
- March 1975
- Bibcode:
- 1975JIETE..21..117K
- Keywords:
-
- Antenna Arrays;
- Antenna Feeds;
- Dipole Antennas;
- Radio Telescopes;
- Steerable Antennas;
- Antenna Design;
- Coupling Circuits;
- Electronic Control;
- Parabolic Antennas;
- Phase Shift Circuits;
- Standing Wave Ratios;
- Communications and Radar