2020 Fiscal Year Final Research Report
A Concept-proof Study of Multibeam Heterodyne Receiver Frontends for Next Generation Radio Telescopes
| Project/Area Number |
18K03708
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 16010:Astronomy-related
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| Research Institution | National Astronomical Observatory of Japan |
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Principal Investigator |
Shan Wenlei 国立天文台, 先端技術センター, 准教授 (60792570)
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| Co-Investigator(Kenkyū-buntansha) |
江崎 翔平 国立天文台, 先端技術センター, 研究技師 (40794508)
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Keywords | multibeam receiver / radio astronomy / SIS mixer / HPI / MMIC |
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| Outline of Final Research Achievements |
This study aims to make essential breakthroughs in the techniques of constructing large-format and compact superconducting multi-beam receiver frontends. The major achievements are as follows. (1) An innovative approach, hybrid planar integration (HPI), has been proposed and developed. This approach has two components. One is silicon-based superconducting monolithic microwave integrated circuit (MMIC) fabrication technique; The other is silicon membrane-based waveguide probes and associated two-dimensional metal waveguide LO distributing network. (2) A single-pixel proof-of-concept receiver based on HPI approach has been developed at 125-164 GHz frequency band. The measurement results approach state-of-the-art performance;(3) A 2 x 2 compact array receiver has been developed at the same frequency band by implementing HPI approach. This array achieved the unprecedent compactness and demonstrated even LO distribution and unaffected single-pixel performance.
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| Free Research Field |
電波天文用受信機の開発
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| Academic Significance and Societal Importance of the Research Achievements |
現在の電波望遠鏡の弱点の一つは、視野が狭いことである。視野の狭さは、星に進化する分子雲などの広い天体を観測する能力を著しく低下させる。このような天体を撮影するためには、望遠鏡のビームをスキャンするために莫大な観測時間を費やさなければならない。この問題を解決するには、望遠鏡の焦点面に複数の検出器を持つマルチビーム受信機を使用する必要がある。しかし、電波望遠鏡用マルチビーム受信機を構築することは技術的に難しい。本研究では、この問題に取り組み、ミリ波からテラヘルツ波までの周波数範囲で動作する次世代電波望遠鏡用のマルチビーム受信機を構築するための実現可能な解決策を提案することを目的とする。
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