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Publication Citation: Noise-Parameter Measurements with a Reflection Type Phase Shifter

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Author(s): Dazhen Gu; David K. Walker; James P. Randa;
Title: Noise-Parameter Measurements with a Reflection Type Phase Shifter
Published: November 01, 2010
Abstract: 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.
Citation: Microwave and Optical Technology Letters
Volume: 52
Issue: 11
Pages: pp. 2600 - 2603
Keywords: Amplifier noise parameters, noise measurement, phase shifter, source pull technique, uncertainty analysis
Research Areas: Electronics & Telecommunications, Measurement Solutions
PDF version: PDF Document Click here to retrieve PDF version of paper (567KB)