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Phase Noise Effects in Sampling Microwave Measurement Systems



Giovanni Loglio, Jeffrey Jargon, Donald C. DeGroot, Zoya Popovic


For the purpose of bounding sources of measurement uncertainty, we examine the effects of phase noise on measured wave-variables using sampling, downconvertor-based measurement systems. Utilizing an analytical description, we show that if the phase of the local oscillator is a time-varying quantity, then the downconverted signal appears as a phase-modulated signal. Furthermore, we discover that this error increases with increasing values of frequency and power level. We validate these claims with measurements. Finally, we propose a procedure for reducing this problem by employing nonlinear fitting routines.
Conference Dates
June 12-17, 2005
Conference Location
Long Beach, CA, USA
Conference Title
ARFTG Microwave Measurement Conference


downconvertor, measurement, microwave phase noise, phase-modulation, sampling, uncertainty


Loglio, G. , Jargon, J. , DeGroot, D. and Popovic, Z. (2005), Phase Noise Effects in Sampling Microwave Measurement Systems, ARFTG Microwave Measurement Conference, Long Beach, CA, USA (Accessed May 20, 2024)


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Created June 16, 2005, Updated October 12, 2021