Phase noise suppression through parametric filtering
Phase noise suppression through parametric filtering
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DOI：
10.1063/1.4975798
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发表时间：
2017-02-06
影响因子：
4
通讯作者：
Piazza, Gianluca
中科院分区：
文献类型：
--
作者：
Cassella, Cristian;Strachan, Scott;Piazza, Gianluca
在这项工作中，我们介绍和实验证明了参数相位噪声抑制技术，我们称之为“参数相位噪声滤波。“这种技术是基于使用一个固态参量放大器在其不稳定区域工作，并包括在一个非自治的反馈回路连接在一个嘈杂的振荡器的输出。我们证明，这样的系统的行为作为一个参数驱动的Duffing谐振器，并可以在特殊的点，它变得在很大程度上免疫影响振荡器输出信号的相位波动。设计并制造了一个参数相位噪声滤波器（PFIL）原型，可在甚高频范围内工作。PFIL原型使我们能够显著降低工作频率约为220 MHz的商用信号发生器输出端的相位噪声。在偏离载波频率1 kHz和10 kHz处，分别获得了16 dB（40倍）和13 dB（20倍）的降噪效果。这种相位噪声抑制技术的演示为任何需要高质量频率产生的应用开发无源和低成本相位噪声消除电路开辟了新的场景。出版社：AIP Publishing
In this work, we introduce and experimentally demonstrate a parametric phase noise suppression technique, which we call " parametric phase noise filtering." This technique is based on the use of a solid-state parametric amplifier operating in its instability region and included in a non-autonomous feedback loop connected at the output of a noisy oscillator. We demonstrate that such a system behaves as a parametrically driven Duffing resonator and can operate at special points where it becomes largely immune to the phase fluctuations that affect the oscillator output signal. A prototype of a parametric phase noise filter (PFIL) was designed and fabricated to operate in the very-high-frequency range. The PFIL prototype allowed us to significantly reduce the phase noise at the output of a commercial signal generator operating around 220 MHz. Noise reduction of 16 dB (40 x) and 13 dB (20 x) were obtained, respectively, at 1 and 10 kHz offsets from the carrier frequency. The demonstration of this phase noise suppression technique opens up scenarios in the development of passive and low-cost phase noise cancellation circuits for any application demanding high quality frequency generation. Published by AIP Publishing.