Waveguide submillimeter mixersA waveguide Schottky barrier diode mixer, which in preliminary tests has yielded a single sideband receiver noise temperature of 4300 K at 692 GHz, when cooled to 77 K is presented. Further refinements and operation at 20 K should produce a significant improvement in performance. From a system point of view, the very high efficiency of the radiation pattern produced by the conical feedhorn with cylindrical corrector mirror enhances the effective sensitivity by a factor of 1.5 to 2 compared to open-structure corner-reflector systems. A second-harmonic mixer for 557 GHz, also in the fundamental mode rectangular waveguide was developed. When combined with a frequency-tripled Gunn oscillator, this makes an extremely compact and lightweight submillimeter radiometer.
Document ID
19870032506
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Goldsmith, Paul F. (Five College Radio Astronomy Observatory Amherst, MA, United States)
Erickson, Neal R. (Millitech Corp. South Deerfield, MA, United States)