Patent ID: 6377616
Filing Date: 2002-04-23
Classification: G01R,H03D,H04B,H04L

Abstract:
Method for calibrating n-port-receivers,wherein n is an integer which can take the value of four, five or six, said n-port-receiver comprising a passive circuit with two inputs, at least one input being supplied with a high-frequency signal to be measured, and at least two outputs (8) supplying power levels (P1, P2, P3, P4) for a signal processing unit (10) which calculates a complex signal being a base on the at least two power levels (P1, P2, P3, P4) and calibration coefficients, wherein a predetermined calibration sequence with different symbols is fed to the at least one input of said n-port receiver for the signal to be measured and the calibration coefficients are calculated based on the calibration sequence.