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A millimeter-wave optoelectronic oscillator with low phase noise and low spurs employing ultrahigh $Q$ optoelectronic hybrid band-pass filter is proposed. The 1-MHz pass-band filter in 29.99 GHz with $Q$ value of 30000 has been demonstrated. Based on this ultranarrow band-pass filter, a 29.99-GHz millimeter-wave signal with the spurious suppression ratio more than 83 dB is successfully generated...
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