Multiport measurement method using a two-port network analyzer with remaining ports unterminated

Abstract

A practical multiport measurement method is presented for the precise characterization of an N-port device using a two-port vector network analyzer. Because the N-2 unused ports need not be terminated with matched loads, a test fixture can be simplified. Any influence of the reflections from the unterminated ports can be deembedded by port renormalization. The proposed method was verified with a coupled microstrip line structure.