Title :
Low-noise 460 GHz waveguide Schottky mixer radiometer for radioastronomy
Author :
Keen, N.J. ; Mischerikow, K.D. ; Ediss, G.A. ; Perchtold, E.
Author_Institution :
Max-Planck-Institut fÿr Radioastronomie, Bonn, West Germany
Abstract :
We report measurements on a cryogenically cooled Schottky barrier diode mixer system at 460 GHz. The mixer and horn are electroformed in a single block, and the carcinotron local oscillator is coupled in through a polarisation diplexer. A double-sideband system noise temperature of 870 K was obtained at midband at 12 K ambient. The total RF/IF double-sideband conversion loss was 9.0 dB, measured at 295 K ambient.
Keywords :
Schottky-barrier diodes; mixers (circuits); radioastronomical techniques; radiometers; solid-state microwave devices; 460 GHz waveguide Schottky mixer radiometer; GHz 0460; RF/IF double-sideband conversion loss; Radioastronomy; SMMW; carcinotron local oscillator; cryogenically cooled Schottky barrier diode mixer system; double-sideband system noise temperature; frequency 460 GHz; low noise radiometer; polarisation diplexer; single block mixer and horn; sub-mm-waves;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19860240
