Wideband technology development to increase the RF and instantaneous bandwidth of ALMA receivers

Takafumi Kojima; Kazunori Uemizu; Hitoshi Kiuchi; Tomonori Tamura; Keiko Kaneko; Ryo Sakai; Akihira Miyachi; Wenlei Shan; Yoshinori Uzawa; Alvaro Gonzalez; Matthias Kroug; Takeshi Sakai

doi:10.1117/12.2561240

13 December 2020 Wideband technology development to increase the RF and instantaneous bandwidth of ALMA receivers

Takafumi Kojima, Kazunori Uemizu, Hitoshi Kiuchi, Tomonori Tamura, Keiko Kaneko, Ryo Sakai, Akihira Miyachi, Wenlei Shan, Yoshinori Uzawa, Alvaro Gonzalez, Matthias Kroug, Takeshi Sakai

Author Affiliations +

Proceedings Volume 11453, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X; 114530P (2020) https://doi.org/10.1117/12.2561240
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

NAOJ have studied wideband receiver technologies at submillimeter wavelengths toward implementation as future upgrades into the Atacama Large Millimeter/submillimeter Array telescope. We have developed critical components and devices such as waveguide components and superconductor-insulator-superconductor (SIS) mixers targeting radio frequencies (RF) in the 275-500 GHz range and an intermediate frequency (IF) bandwidth of 3-22 GHz. Based on the developed components, quantum-limited low-noise performance has been demonstrated by using a double-sideband receiver frontend in combination with a high-speed digitizer. In addition, a preliminary demonstration of a wideband RF/IF sideband-separating SIS mixer was performed. This paper describes the status of our efforts to develop technology toward wideband receivers for ALMA.

Conference Presentation

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Takafumi Kojima, Kazunori Uemizu, Hitoshi Kiuchi, Tomonori Tamura, Keiko Kaneko, Ryo Sakai, Akihira Miyachi, Wenlei Shan, Yoshinori Uzawa, Alvaro Gonzalez, Matthias Kroug, and Takeshi Sakai "Wideband technology development to increase the RF and instantaneous bandwidth of ALMA receivers", Proc. SPIE 11453, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X, 114530P (13 December 2020); https://doi.org/10.1117/12.2561240

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