| Project/Area Number |
22740126
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Astronomy
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| Research Institution | National Astronomical Observatory of Japan |
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Principal Investigator |
NAKAJIMA Taku 国立天文台, 野辺山宇宙電波観測所, 研究員 (90570359)
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| Project Period (FY) |
2010 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2011: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2010: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
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| Keywords | 電波天文学 / ミリ波・サブミリ波 / 超電導SISミクサ / 2SB受信機 / サイドバンド分離比 / 超伝導SISミクサ / サイドバンド分離(2SB)受信機 |
|---|
| Research Abstract |
I have developed the measurement system of image rejection ratio(IRR), which is one of the important performance of sideband separating(2SB) receiver in millimeter/sub-millimeter wave band and have installed on the 45-m millimeter wave telescope in Nobeyama Radio Observatory, National Astronomical Observatory of Japan. The IRRs were evaluated by measuring the relative amplitudes of the IF responses in the USB and LSB injecting a continuous wave(CW) signal generated by multiplying the output of the signal generator(SG) with the frequency multiplier to observation frequency band. I confirmed that we can measure IRR with an accuracy of±5% with my system.
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