Title :
Test of phase-retrieval holography on the Onsala 20 m radiotelescope
Author :
Ellder, J. ; Lundahl, L. ; Morris, Dan
Author_Institution :
Onsala Space Observatory, Onsala, Sweden
Abstract :
The phase-retrieval method for the radio holography of reflector antennas has been tested. The 22 GHz water vapour maser source in Orion was observed to measure the infocus and defocused antenna power patterns. The aperture phase distribution was then derived by the Misell algorithm. An RMS phase error of 0.13 rad was achieved (0.14 mm). The surface resolution was about 1.6 m (between half amplitude points).
Keywords :
antenna radiation patterns; microwave antennas; microwave holography; radiotelescopes; 22 GHz H2O maser source; GHz 0022; Misell algorithm; Onsala 20 m radiotelescope; Orion; RMS phase error; SHF; antenna diagnosis; aperture phase distribution; defocused antenna power patterns; infocus antenna pattern; phase-retrieval holography; phase-retrieval method; radio holography; reflector antennas; surface resolution;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19840486
