SAW振荡器的相位噪声分析

Phase Noise Analysis of SAW Oscillators

声表面波振荡器是一种典型的反馈振荡器。根据Ｌｅｅｓｏｎ反馈振荡器相位噪声模型，分析了ＳＡＷ振荡器的相位噪声特点，特别是不同的ＳＡＷ反馈元件，分析结果表明不同的ＳＡＷ反馈元件通常有不同的相位噪声特点。还讨论了降低相位噪声电平。

Surface acoustic wave (SAW) oscillator is a kind of typical feedback oscillators with feedback elements.Its phase noise characteristics is analyzed in the context of Leesons model of feedback oscillator phase noise and particular attention is given to the cases of different feedback SAW elements,since different feedback elements ordinarily denote different phase noise characteristics in the view of our points in this paper.Approaches and methods for reducing phase noise levels are discussed along with an analysis of reported attempts to obtain improved spectral purity.