Beam aberration correction technique for a BWG antenna

Author

Veruttipong, W. ; Slobin, S. ; Franco, M.

Author_Institution

Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA

Volume

4

fYear

2002

fDate

2002

Firstpage

132

Abstract

A technique for a real-time beam aberration correction scheme for deep space uplink and downlink communications is presented. This technique provides a closed-form relationship between the beam aberration angles and the corresponding feed displacement for a reflector antenna with a beam waveguide (BWG) or multiple reflector system. This algorithm will enable one to accurately predict the movement of the feed in real time for a known beam deviation while the antenna is tracking a spacecraft. It is also useful to determine the feed offset position needed to correct for the beam deviation due to an imperfect antenna mechanical structure, and subreflector and mirror misalignments for a complex multiple reflector system.

Keywords

antenna radiation patterns; reflector antennas; space communication links; tracking; waveguide antennas; BWG antenna; antenna feed movement; antenna mechanical structure; beam aberration angles; beam waveguide antenna; closed-form relationship; deep space downlink communications; deep space uplink communications; feed displacement; feed offset position; mirror misalignment; multiple reflector system; real-time beam aberration correction; reflector antenna; spacecraft tracking; subreflector misalignment; Antenna feeds; Azimuth; Directive antennas; Downlink; Mirrors; Optical scattering; Reflector antennas; Space technology; Space vehicles; Tracking;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 2002. IEEE

Print_ISBN

0-7803-7330-8

Type

conf

DOI

10.1109/APS.2002.1016943

Filename

1016943