Abstract：Multi-tier TRL calibration is one of the commonly used calibration methods for measuring microwave millimeter-wave high power devices. A broadband TRL calibration optimization algorithm that combines a priori knowledge and dynamic minimization of error approximation is proposed to address the issue of the phase shift of error coefficients that can occur in classical TRL calibration methods for high power device measurement. Based on the domestic AV3672 vector network analyzer and system of load pull measurement at 3.8GHz with the third harmonic to verify the validation of the algorithm. The experimental results prove that the algorithm effectively corrects the phase shifts of the error coefficients, and the analysis of the optimal impedance point of the large signal operation of the device is more accurate, and the complexity of the algorithm does not increase significantly, it can be applied as a subsequent correction step of the classical TRL algorithm, which is highly practical and versatile.
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2022, Vol. 43 
