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Noise-Parameter Measurements with a Reflection Type Phase Shifter



Dazhen Gu, Dave K. Walker, James P. Randa


We report a miniaturized phase shifter operating in the frequency range from 5 GHz to 7 GHz for noise-parameter extraction. Such a tunable solid-state unit represents a significant reduction in the size and mass as a source-pull component, compared to its mechanical counterparts. It provides adequate impedance coverage, ultra-fast response, as well as high repeatability, across the designed region. A packaged low noise amplifier was measured at integer frequencies (5 GHz, 6 GHz, and 7 GHz) by use of the phase shifter on the NIST NFRad system. The measured results exhibited good accuracy. The combined uncertainties (Type-A and Type-B) are below 6 % for both the minimum noise temperature and the magnitude of the optimum input reflection coefficient.
Microwave and Optical Technology Letters


Amplifier noise parameters, noise measurement, phase shifter, source pull technique, uncertainty analysis


Gu, D. , Walker, D. and Randa, J. (2010), Noise-Parameter Measurements with a Reflection Type Phase Shifter, Microwave and Optical Technology Letters, [online], (Accessed April 22, 2024)
Created November 1, 2010, Updated February 19, 2017