PROJECT TITLE :

Generalized Theory of the Thru-Reflect-Match Calibration Technique

ABSTRACT:

The via-mirror-match (TRM) calibration technique uses as standards a through connection of ports 1 and a pair of of the vector network analyzer, 2 symmetrical highly reflecting masses, and two broadband loads (match) of impedance close to the measuring system impedance ( ). The classical theory of the TRM calibration refers the calibration to the impedance of the load used as the match normal ( ), which is assumed as symmetrical. In follow, might be frequency dependent. Moreover, because the frequency increases, the symmetry condition of the load used as match commonplace could become difficult to preserve, thus affecting the reference impedance definition and reducing the accuracy of the calibration. During this paper, the -parameters matrix formalism is used to introduce for the first time a generalized TRM calibration theory, allowing the utilization of either symmetrical or nonsymmetrical loads of arbitrary impedance because the match normal.