Patent ID: 6091247
Filing Date: 2000-07-18
Classification: G01R

Abstract:
A calibration method for step attenuator including N attenuators (N.gtoreq..sub.1) which are respectively named as A.sub.1, A.sub.2, . . . , A.sub.N, said method comprising the following steps:(a) testing S-parameters without attenuation, said S-parameters being represented as ##EQU17## (b) testing S-parameters of individual single-stage attenuators, said S-parameters being respectively represented as ##EQU18## (c) converting respectively the above (N+1) sets of S-parameters to linearized parameters being represented as, ##EQU19## computing linearized parameter of any m attenuators K.sub.1, K.sub.2, . . . , K.sub.m selected from said N attenuators A.sub.1, A.sub.2, . . . , A.sub.N) of said N attenuators connected in series by means of the following mathematical formula ##EQU20## and (d) converting said linearized parameters ##EQU21## to S-parameters ##EQU22## for computing attenuation corresponding to attenuators K.sub.1, K.sub.2, . . . , K.sub.m connected in series.