Patent ID: 7782065

Claim:
A method for calibrating a network analyzer having at least two measuring ports, comprising the steps of: measuring a predetermined transmitting first calibration standard designed as a two-port standard and connected between two test ports of the network analyzer; measuring a second calibration standard, designed as a two-port standard or a double one-port standard and connected between the two test ports of the network analyzer wherein only reflection parameters of the second standard are predetermined; measuring a third standard that is symmetrical with regard to its reflection parameters and designed as a two-port standard or a double one-port standard and is connected between the two test ports of the network analyzer; and calculating matrix elements of error two-ports assigned to the test ports based on results of said measuring the first, second and third calibration standards, wherein reflection parameters of the first calibration standard and of the second calibration standard have any, but known, non-zero values and reflection parameter of the third calibration standard is non-zero, but is unknown.