A novel design for giant radio telescopes with an active spherical main reflector

Details A novel design for giant radio telescopes with an active spherical main reflector A novel design for giant radio telescopes with an active spherical main reflector

Feb 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998cha%26a..22..361q&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 22, Issue 3, p. 361-368.

Astronomy and Astrophysics

Astrophysics

Scientific paper

A novel design for giant radio telescopes is proposed. Instead of using a complex feed system for the correction of spherical aberration (such as the Arecibo 3-reflector system), we propose to use an active main spherical reflector. The part of the main reflector illuminated by the feed is continually adjusted in real-time to fit as closely as possible a paraboloid during tracking so that we can use a traditional parabolic antenna feed to effect broad-band and polarization measurements. This design has the advantages of a large sky coverage and the possibility of independent multi-lobe observation. The concept is applied to a specific example of a telescope with an overall aperture 500 m, a radius of curvature 300 m and a usable aperture 300 m.

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