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An Injection- and Frequency-Locked Loop for Reducing Phase Noise of Wideband Oscillators.

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Title: An Injection- and Frequency-Locked Loop for Reducing Phase Noise of Wideband Oscillators.
Authors: Peng, Kang-Chun1, Lee, Chan-Hung1, Wong, De-Guei1, Wang, Fu-Kang2, Horng, Tzyy-Sheng2
Source: IEEE Transactions on Microwave Theory & Techniques. Mar2018, Vol. 66 Issue 3, p1374-1383. 10p.
Subjects: Frequency-locked loops, Injection locked oscillators, Phase noise
Abstract: High-performance microwave oscillators often exploit feedback loop methods such as those that involve a frequency-locked loop (FLL) or a self-injection-locked loop to improve phase noise. This paper proposes a novel injection- and frequency-locked loop (IFLL) for reducing phase noise of wideband oscillators, which uses an injection-locked oscillator instead of a high-gain amplifier and a variable phase shifter in the FLL to amplify and phase-shift the feedback signal. In this paper, the frequency domain analysis is presented to characterize the proposed IFLL and compared with the experimental results. Consequently, the oscillators that use the IFLL exhibit remarkable phase-noise reduction, which is 5.5–9.3 dB better than that achieved using conventional FLLs at 1-MHz offset frequency, over a wide tuning range of about 53%. [ABSTRACT FROM PUBLISHER]
Copyright of IEEE Transactions on Microwave Theory & Techniques is the property of IEEE and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: <searchLink fieldCode="AR" term="%22Peng%2C+Kang-Chun%22">Peng, Kang-Chun</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Lee%2C+Chan-Hung%22">Lee, Chan-Hung</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Wong%2C+De-Guei%22">Wong, De-Guei</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Wang%2C+Fu-Kang%22">Wang, Fu-Kang</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Horng%2C+Tzyy-Sheng%22">Horng, Tzyy-Sheng</searchLink><relatesTo>2</relatesTo>
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  Data: High-performance microwave oscillators often exploit feedback loop methods such as those that involve a frequency-locked loop (FLL) or a self-injection-locked loop to improve phase noise. This paper proposes a novel injection- and frequency-locked loop (IFLL) for reducing phase noise of wideband oscillators, which uses an injection-locked oscillator instead of a high-gain amplifier and a variable phase shifter in the FLL to amplify and phase-shift the feedback signal. In this paper, the frequency domain analysis is presented to characterize the proposed IFLL and compared with the experimental results. Consequently, the oscillators that use the IFLL exhibit remarkable phase-noise reduction, which is 5.5–9.3 dB better than that achieved using conventional FLLs at 1-MHz offset frequency, over a wide tuning range of about 53%. [ABSTRACT FROM PUBLISHER]
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  Data: <i>Copyright of IEEE Transactions on Microwave Theory & Techniques is the property of IEEE and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1109/TMTT.2017.2779132
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        Text: English
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      – SubjectFull: Injection locked oscillators
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      – SubjectFull: Phase noise
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              Text: Mar2018
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