Phase Noise Analysis of SAW Oscillators

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.