METHOD FOR CALIBRATION OF INHERENT S-PARAMETERS OF DEVICES FOR MEASURING COMPLEX COEFFICIENTS OF TRANSMISSION AND REFLECTION OF MICROWAVE FOUR-TERMINAL DEVICES

摘要

FIELD: radio engineering, communication.;SUBSTANCE: method involves measuring the reference matched load, the short circuit load and the open circuit load, connecting said loads once directly to the calibrated measurement port and for the second time through a transmission line with a calibrated length; reference values, the measured values of reflection coefficients of the three reference loads and the calculated value of the transmission coefficient of the transmission line with a calibrated length are used to obtain a relationship of residual S-parameters which characterise the equivalent four-terminal device, errors through which true values of the reflection coefficients of the open circuit reference loads and the matching load, which are then used to calculate true inherent S-parameters of the calibrated measurement port of the device for measuring complex coefficients of transmission and reflection of microwave four-terminal devices, which are used in measurements of test microwave four-terminal devices.;EFFECT: high measurement accuracy of test microwave four-terminal devices.;1 dwg