System configurations for nine-port network analyser employing symmetricalfive-port junctions

A nine-port network analyser that requires only six (instead of sight or te n) power sensors to obtain the unknown scattering coefficients of a two-por t device is proposed. Hardware imperfections will naturally affect the perf ormance of this instrument. Monte Carlo simulations have been conducted in order to evaluate the deleterious effects clue to the residual mismatches o f the constituent components within the nine-port system. The results sugge st that improvements in instrumentation accuracy may be achieved simply by modifying the system's overall configuration.