Patent ID: 8810257
Filing Date: 2014-08-19
Classification: G01R

Abstract:
1. A method for using a measurement system including an impedance-controlling tuner and a signal transmission line, the tuner including a signal transmission line segment as at least part of the signal transmission line, the method comprising a sequence of the following steps: (i) pre-characterizing the tuner over some desired tuning range at a number of impedance tuning points; (ii) coupling a signal coupling device in a non-contacting relationship to the signal transmission line of the measurement system to allow measurement of an impedance presented to a device-under-test (DUT) with the DUT in place; (iii) for DUT measurements, setting the impedance tuning at one of said pre-characterized impedance tuning points or by interpolating between pre-characterized impedance tuning points to achieve a particular target impedance presented to the DUT; and (iv) using the signal coupling device, measuring an actual impedance presented to the DUT after the tuning setting is determined and set.