Citation
Abstract
A cryogenically cooled Ka-band (33.6-GHz), seven-element front-end array for the DSN has been built and tested. This system uses seven high-electron-mobilitytransistor (HEMT) low-noise amplifiers cooled by a two-stage closed-cycle refrigerator. All system components from the polarizers to the output isolators are cooled to a physical temperature between 18 and 35 K. The noise temperatures of the individual elements range from 64 to 84 K over a 2.75-GHz bandwidth.
Details
- Volume
- 42-114
- Published
- August 15, 1993
- Pages
- 51–60
- File Size
- 341.0 KB