ISSN:
1572-9559
Keywords:
submillimeter heterodyne receiver
;
open structure mixer
;
Schottky barrier diode
;
HCOOH-
;
HCOOD-laser
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract 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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01009658
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