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Journal of Electrical and Computer Engineering
Volume 2010 (2010), Article ID 537132, 4 pages
Research Article

How to Model the Near-to-the-Carrier Regime and the Lower Knee Frequency of Real RF Oscillators

1Department of Computer Communications, EIS Middlesex University, London, NW4 4BT, UK
2EEE Department, University College London, London, WC1E 7JE, UK

Received 17 August 2009; Accepted 15 October 2009

Academic Editor: Shen-Iuan Liu

Copyright © 2010 Arsenia Chorti. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Numerous empirical data demonstrate that real noisy RF oscillators are affected by power-law phase noise. However, until recently, the robust analytic modeling of the deep-into-the-carrier spectral regime of RF oscillators was intangible due to the infinities involved in the relevant power-law regions. In this letter we demonstrate how recent advances in oscillator spectral modeling can be applied to extrapolate the near-to-the-carrier regime as well as estimate the oscillator lower knee frequency of transition between the deep-into-the-carrier regime and the power-law regions of real RF oscillators.