Patent ID: 6744262
Filing Date: 2004-06-01
Classification: G01R

Abstract:
A method of characterizing a device having an odd number of device ports comprising the steps of:establishing a device S-parameter matrix (SD) to represent electrical behavior of said device, an adapter T-parameter matrix (Ta) to represent all possible electrical paths through one or more circuits to all of the device ports, and a cascaded S-parameter matrix (Sc) to represent said one or more circuits cascaded with said device, obtaining values for said adapter T-parameter matrix to represent electrical behavior of said one or more circuits, measuring said device cascaded with said one or more circuits to obtain values for said cascaded S-parameter matrix, and solving for said device S-parameter matrix as a function of said adapter T-parameter matrix and said cascaded S-parameter matrix, wherein said step of establishing said adapter T-parameter matrix comprises modeling said device with an additional device port and including as part of said adapter T-parameter matrix for said one or more circuits values that represent a zero length, loss-less transmission line connected to said additional device port and terminated in a perfect load.