Computer Science – Performance
Scientific paper
Nov 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3465..453o&link_type=abstract
Proc. SPIE Vol. 3465, p. 453-456, Millimeter and Submillimeter Waves IV, Mohammed N. Afsar; Ed.
Computer Science
Performance
2
Scientific paper
We developed a 40 - 50 GHz array receiver which has six feed horns (2 X 3 array) and six superconducting-insulating- superconducting (SIS) mixers. We used tunerless SIS mixers to make the tuning system simple and to achieve the high stability. The receiver system is designed as a sophisticated tool for continuum observation of the Sunyaev-Zel'dovich effect toward clusters of galaxies. The receiver noise temperature is 20 - 30 K. The instantaneous band width is 700 MHz. This system is installed on the focal plane platform of the Nobeyama 45-m telescope. We did a test observation to evaluate the performance of the receiver system. The estimated DSB system noise temperature were 110 - 170 K at 43 GHz. The aperture efficiency and the main-lobe efficiency of this system were 0.4 - 0.6 and 0.5 - 0.9, respectively.
Kasuga Takashi
Miyazaki Atsushi
Noguchi Takashi
Ohno Takeshi
Sakamoto Akihiro
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