Title :
Measurement of the Odin telescope at 119 GHz with a hologram-type CATR
Author :
Ala-Laurinaho, Juha ; Hirvonen, Taavi ; Piironen, Petri ; Lehto, Arto ; Tuovinen, Jussi ; Räisänen, Antii V. ; Frisk, Urban
Author_Institution :
Radio Lab., Helsinki Univ. of Technol., Espoo, Finland
fDate :
9/1/2001 12:00:00 AM
Abstract :
Development work of a 119 GHz compact antenna test range (CATR), based on a 2.4 m×2.0 m hologram and its application on the Odin telescope tests are described. The hologram element comprises seven parts, which are fabricated using silk-screen printing techniques. Comparison between the theoretical and the measured quiet-zone fields of the hologram CATR is made, which demonstrates the correctness of the analysis method and also the importance of high quality physical joints between the hologram parts. The CATR has been successfully used in the measurement of a 1.1-m offset reflector antenna onboard the Odin spacecraft. The measured and calculated antenna radiation patterns are in good agreement in the main beam region. The effects of the imperfections in the quiet-zone field and in the aperture field of the antenna on the measurement results are simulated
Keywords :
antenna radiation patterns; antenna testing; holography; millimetre wave antennas; offset reflector antennas; radiotelescopes; satellite antennas; 0.55 m; 119 GHz; EHF; Odin spacecraft; Odin telescope tests; analysis method; aperture field; calculated antenna radiation patterns; compact antenna test range; high quality physical joints; hologram element; hologram parts; hologram-type CATR; main beam region; measured antenna radiation patterns; measured quiet-zone fields; measurement results; offset reflector antenna; quiet-zone field; silk-screen printing techniques; simulation; Antenna measurements; Aperture antennas; Extraterrestrial measurements; Millimeter wave measurements; Millimeter wave technology; Reflector antennas; Satellite broadcasting; Space technology; Telescopes; Testing;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
