Patent ID: 7038468
Filing Date: 2006-05-02
Classification: G01R

Abstract:
1. A method for characterizing a device under test (DUT) comprising the steps of: providing a first sinusoidal signal having a first frequency to a first signal port of said DUT as a power tone signal; providing a second signal having a second frequency to a second signal port of said DUT as a probe tone signal, whereby the difference between said second frequency and said first frequency is equal to a third frequency and whereby the amplitude of said second signal is such that there exists a non-analytic substantially linear relationship between the spectral components of the traveling voltage waves that are incident to said DUT signal ports and that have said second frequency and the spectral components of the traveling voltage waves that are scattered by said DUT signal ports and that have a frequency equal to said first frequency minus said third frequency; and determining the spectral components of the traveling voltage waves that are incident to said DUT signal ports and the spectral components of the traveling voltage waves that are scattered by said DUT signal ports, whereby said spectral components are determined for a frequency equal to said first frequency, equal to said second frequency and equal to said first frequency minus said third frequency.