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Analysis of phase noise effect on microwave attenuation precision measurement using a heterodyne receiver

机译:利用外差接收机分析相位噪声对微波衰减精度测量的影响

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摘要

The phase noise effect on microwave attenuation precision measurement using a lock-in amplifier (LIA) is studied. A frequency domain phase noise modeling is used to analyse the phase sensitive detection made by the LIA. The error bound for the magnitude and phase of LIA measurement has been established. The theoretical prediction of the maximum magnitude and phase fluctuation in LIA output agrees with the measured data quite well. This analysis is important for estimating the maximum attenuation measurement error caused by the phase noise of microwave sources and its uncertainty contribution to microwave attenuation measurement.
机译:研究了使用锁相放大器(LIA)的相位噪声对微波衰减精度测量的影响。频域相位噪声建模用于分析LIA进行的相位敏感检测。已经确定了LIA测量的幅度和相位的误差。 LIA输出中最大幅度和相位波动的理论预测与实测数据非常吻合。此分析对于估算由微波源的相位噪声引起的最大衰减测量误差及其对微波衰减测量的不确定性贡献非常重要。

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