Citation
Abstract
This article presents the results of tests performed to verify predicted sources of receive antenna gain-to-system noise temperature ratio (G=T) improvements for the DSS-13 beam-waveguide antenna. The sources that gave the most improvement were (1) covering holography adjustment holes with aluminum-tape circular disks, (2) covering all panel gaps on the main-reflector surface with aluminum tape, and (3) installing a liquid-nitrogen load to capture stray signals that normally would be absorbed by an ambient environment. The total measured improvement for all sources of improvement tested was 1.2 K at 8.420 GHz and 2.9 K at 32 GHz. The improvement was larger at 32 GHz because a liquid-nitrogen load test was not performed at 8.420 GHz.
Keywords
beam waveguide antenna
noise temperature
G/T
antenna performance
Details
- Volume
- 42-142
- Published
- August 15, 2000
- Pages
- 1–18
- File Size
- 1.8 MB