The Development of Q-Band HEMT Receiver for VLBI

Details The Development of Q-Band HEMT Receiver for VLBI The Development of Q-Band HEMT Receiver for VLBI

Mar 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004jass...21...29j&link_type=abstract

Journal of Astronomy and Space Sciences. Vol. 21, no. 1, p.29-38

Astronomy and Astrophysics

Astronomy

Low Noise Receiver, Hemt, Vlbi

Scientific paper

A ultra low noise Q-band HEMT receiver for VLBI has been developed using a local oscillator with a very high phase stability. The performance of receiver was verified by comparison with receivers which were developed at the other countries. The receiver noise temperature shows 65 K in the frequency ragne from 42 GHz to 44 GHz, less than 100 K from 39 GHz to 46 GHz, respectively. A receiver noise temperature at SiO major line of 43GHz which will be mainly observed by using this receiver has been optimized.

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