ALMA memo 435 A Hybrid Option for the First LOs using Direct Photonic LO Driver
نویسندگان
چکیده
We propose a hybrid option for the first local oscillators (LOs) of ALMA in which a direct photonic LO driver is used to drive cold multipliers. The photomixer using NTT uni-travelling carrier photodiode has been demonstrated to have high power of 2 m W at 100 GHz and low amplitude noise of < 7 − 17 K/μW in the frequency range of 98 − 105 GHz. This option simplifies the LO part of the cartridge in the baseline ALMA and retains a future possibility for a direct photonic option.
منابع مشابه
Alma Memo #440: Photonic Techniques for Local Oscillator Generation and Distribution in Millimeter-wave Radio Astronomy 10/31/2002
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تاریخ انتشار 2002