13 November 1998 40- to 50-GHz array receiver with tunerless SIS mixers
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Abstract
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.
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Takeshi Ohno, Takeshi Ohno, Atsushi Miyazaki, Atsushi Miyazaki, Masato Tsuboi, Masato Tsuboi, Takashi Kasuga, Takashi Kasuga, Takashi Noguchi, Takashi Noguchi, Akihiro Sakamoto, Akihiro Sakamoto, "40- to 50-GHz array receiver with tunerless SIS mixers", Proc. SPIE 3465, Millimeter and Submillimeter Waves IV, (13 November 1998); doi: 10.1117/12.331199; https://doi.org/10.1117/12.331199
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