Citation
Abstract
The combination of a cryogenically-cooled parametric upconverter and a higher frequency maser post amplifier has been proposed as a method of achieving maser-like receiver noise temperatures over much larger instantaneous bandwidths and tuning ranges than are presently obtainable with masers in the range of 1 to 18 GHz. An experimental 2.0- to 2.5-GHz parametric upconverter/maser system has been developed to explore these possibilities. Initial tests of this system have resulted in an effective input noise temperature of 3.1 K at 2295 MHz and 3.2 K at 2388 MHz. The parametric upconverter has logged over 1500 hours at 4.5 K and has undergone 5 thermal cycles (300 K to 4.5 K to 300 K) without degradation.
Details
- Volume
- 42-48
- Published
- December 15, 1978
- Pages
- 31–47
- File Size
- 6.1 MB