Title :
Optimum location of the wobble axis of secondary mirrors in cassegrain-type telescopes
Author_Institution :
Astronomical Institute, Zonnenberg, Neitherlands
fDate :
10/1/1984 12:00:00 AM
Abstract :
The best position for the rotation axis of the wobbling secondary mirror in a Cassegrain type of antenna is through the focal point of the main mirror: the prime focus. Compared to the usual situation, where the axis of rotation contains the vertex of the secondary mirror, this means a considerable improvement of beam quality, especially at large wobble angles.
Keywords :
Radio telescopes; Reflector antennas, multireflector; Focusing; Gravity; Mirrors; Noise cancellation; Noise level; Optical receivers; Optical surface waves; Structural beams; Telescopes; Testing;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.1984.1143202
