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Phase-shifterless phase-noise measurement of microwave oscillators using high-Q cavity frequency discriminator

Gheidi, H ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. DOI: 10.1109/ARFTG.2013.6579027
  3. Publisher: 2013
  4. Abstract:
  5. This paper presents application of high-Q cavity resonator in phase-shifter less technique. A mathematical analysis is presented to show the dependency of the measured phase noise in terms of loaded quality factor and resonance frequency of the high-Q cavity resonator. Experimental measurements resulted from different methods for a synthesized oscillator at 9.976 GHz show great validity and accuracy of the proposed technique. This technique needs no tuning for the phase-shifter and can introduce better sensitivity compared to the setup that uses a delay-line as a frequency discriminator element due to much lower insertion loss particularly at high carrier frequencies. The sensitivity of -113 and -135 dBc/Hz at 10 and 100 kHz offsets form the carrier frequency of around 10 GHz was achieved
  6. Keywords:
  7. Frequency discriminator ; High-Q cavity resonator ; Carrier frequency ; Frequency discriminators ; High-Q cavity ; Loaded quality factor ; Mathematical analysis ; Phase noise measurement ; Phase-shifterless ; Resonance frequencies ; Acoustic noise measurement ; Cavity resonators ; Microwave measurement ; Phase noise ; Units of measurement ; Microwave oscillators
  8. Source: 81st ARFTG Microwave Measurement Conference: Metrology for High Speed Circuits and Systems ; 2013 ; 9781467349826 (ISBN)
  9. URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6579027