Cunningham, C.T and Hayward, R.H and Wade, J.D and Davies, S.R and Matheson, D.N (1992) A 345 GHZ Heterodyne Receiver for the James-Clerk-Maxwell Telescope. International Journal of Infrared and Millimeter Waves, 13 (12). pp. 1827-1843. ISSN 0195-9271.
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In this paper we describe the design and performance of a low-noise 345 GHz heterodyne receiver. The mixer uses a lead alloy SIS tunnel junction mounted in reduced height rectangular waveguide and is tuned with a single backshort. Local oscillator power is provided by a broad-band Gunn oscillator which drives a frequency quadrupler. The heterodyne performance has been verified in the laboratory using a gas absorption cell. In November 1991 this receiver was successfully commissioned and by direct comparison with a Schottky diode receiver we confirm a best receiver noise temperature of 150K (DSB) at 355 GHz and a tuning range of 300 to 380 GHz. The receiver is now available as a JCMT facility instrument.
|Uncontrolled keywords:||SIS-MIXER; QUASI-PARTICLE MIXER; MILLIMETER WAVES|
|Subjects:||T Technology > TA Engineering (General). Civil engineering (General)|
|Divisions:||Faculties > Science Technology and Medical Studies > School of Engineering and Digital Arts|
|Depositing User:||P. Ogbuji|
|Date Deposited:||10 Oct 2009 13:34|
|Last Modified:||21 May 2011 00:20|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/22435 (The current URI for this page, for reference purposes)|
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