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A dual-channel heterodyne microwave phase-shift measurement system has been developed. This system is used to provide accurate transmission phase measurement of various devices and phase-shift standards from 50 MHz to 2 GHz. The system design and measurement uncertainties analysis are given in this paper. A beadless coaxial air line has been used as a phase-shift standard to verify the system performance...
A broadband microwave attenuation measurement standard using audio frequency substitution method is described in this paper. The broadband standard includes a single channel and a dual channel system. The single channel system is used to perform accurate attenuation measurement from 10 MHz to 2 GHz. From 2 GHz to 26.5 GHz, the dual channel system is used to reduce the receiver noise and improve the...
The mismatch uncertainty in microwave power sensor calibration system is analyzed. Propagation of uncertainties from the reflection coefficients in real and imaginary format are considered. Monte Carlo method (MCM) is used to estimate the probability distribution function (PDF) of the mismatch factor, which is found to be non-Gaussian for small reflection coefficient values. The mismatch uncertainties...
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