Calibration procedure for a quadrature meter of microwave path parameters

The procedure for calibrating the device for automatic measurement of complex parameters and the power level of the microwave path is proposed. The procedure involves the determination of constants included in the system of measuring equations using exemplary impedance measures: movable short-circuited load; non-reflective load; load with known parameters. The calibration procedure can be carried out using three reference standards. The issue of optimization of the procedure from the point of view of minimizing the error caused by the residuals of the equations due to the error in measuring the quadrature components at the outputs of the quadrature detectors is considered. This is achieved by applying an additional reference standard and increasing the number of equations in the calibration system. A system of calibration nonlinear equations is obtained, the solution of which is carried out using an iterative procedure that provides a minimum of the mean square error.