Computer Science – Performance
Scientific paper
Mar 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984ijimw...5..301r&link_type=abstract
International Journal of Infrared and Millimeter Waves, Volume 5, Issue 3, pp.301-314
Computer Science
Performance
19
Submillimeter Heterodyne Receiver, Open Structure Mixer, Schottky Barrier Diode, Hcooh-, Hcood-Laser
Scientific paper
The performance of a submillimeter heterodyne receiver using an HCOOH laser local oscillator and an open structure mixer with a Schottky barrier diode has been optimized for 693 GHz. Working at room temperature a single sideband (SSB) system noise temperature of 7,300 K, a mixer noise temperature of 6,100 K and a conversion loss of 12 dB has been achieved. The same receiver system has been investigated at 324 GHz using an HCOOD laser local oscillator yielding a noise temperature of 3,100 K (SSB), a mixer noise temperature of 2,400 K (SSB) and a conversion loss of 10 dB (SSB). An acousto-optical spectrometer has also been constructed, with 1024 channels and a channel-bandwidth of 250 kHz. The system NEP per channel was 2.5×10-17 W/Hz1/2 at 324 GHz and 5.0×10-17 W/Hz1/2 at 693 GHz.
Durwen E. J.
Röser Hans-Peter
Schultz G. V.
Wattenbach R.
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