Patent ID: 7053628

Claim:
A calibration method for electromechanical tuner of a metal-dielectric combination microwave probes for use in two-probe electromechanical microwave load-pull tuners comprising: a test port and an idle port, wherein said probes are surrounding the central conductor and are sliding over the central conductor of the slotted airline of said tuner and their position is controlled independently by means of a horizontal remote translation mechanism; using a calibrated vector network analyzer (VNA) measuring scattering parameters (S parameters) between the test and idle port of the tuner as a function of the combination of two sets of horizontal positions of the probes related to the test port of the tuner; saving the scattering parameters in a calibration data file for later use; wherein a first set of positions is selected when both probes move simultaneously away from the test port between zero and one half of a wavelength at the center frequency of operation and a second set of positions is selected when the first probe remains immobile closest to the test port and the second probe moves away from zero to one half of a wavelength at the center frequency of operation, relative to the position of the first probe.