A new radio spectral receiving system at lambda =13 MM in Urumqi Astronomical Station

Details A new radio spectral receiving system at lambda =13 MM in Urumqi Astronomical Station A new radio spectral receiving system at lambda =13 MM in Urumqi Astronomical Station

Jun 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26as..137..537z&link_type=abstract

Astronomy and Astrophysics Supplement, v.137, p.537-541

Astronomy and Astrophysics

Astrophysics

Instrumentation: Detectors

Scientific paper

We describe a new radio spectral receiving system installed on the 25 m radio telescope of the Urumqi Astronomical Station in China. The receiver is conventional cryogenically cooled 22 GHz system, with the front end being a low noise HEMT amplifier. An average noise temperature of the receiver is about 50 K. The back end, however, is less conventional; it is a surface acoustic wave chirp transform spectrometer (SAW CZT), used for the first time in radio astronomy. As the prototype spectrometer, this system has a bandwidth of 40 MHz and 39.06 KHz frequency resolution. The observational results of water vapor masers demonstrate the feasibility of the SAW CZT-based spectrometer as astronomical spectral line observations.

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