Citation
Abstract
In February and March 1980, the DSS 14 64-meter antenna X-band gain was determined using the R&D XKR feedcone. Tests prior to, and following the installation ofan improved subreflector, proved the new unit largely (ifnot totally) restored initial performance levels at that station. The X-band peak gain with the new subreflector is +71.8 dBi (area efficiency of47.3 percent); an increase of +0.47 dB due to the new unit installation. The tests further showed a significant shift in the axial focus required (function of elevation angle) which, if not implemented operationally, will cause a serious degradation. An historical summary of all documented X-band gain measurements at DSS 14, covering the period 1968 to 1980, is included and reviewed. This summary traces the initial performance through various major configuration changes such as the installation of the X-band dual hybrid mode horn within the operational XRO feedcone. Finally, based on the summary and recent data, a peak X-band antenna gain of +72.1 dBi (area efficiency of 50.8 percent) is projected for the operational feedcone. Recommendations for further work are given.
Details
- Volume
- 42-60
- Published
- December 15, 1980
- Pages
- 168–176
- File Size
- 140.4 KB