Articles | Volume 3
Adv. Radio Sci., 3, 51–58, 2005
https://doi.org/10.5194/ars-3-51-2005
Adv. Radio Sci., 3, 51–58, 2005
https://doi.org/10.5194/ars-3-51-2005

  12 May 2005

12 May 2005

Influence of nonideal LRL or TRL calibration elements on VNA S-parameter measurements

U. Stumper U. Stumper
  • Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany

Abstract. For the 7-term LRL and TRL calibration of a four-sampler vector network analyser (VNA), expressions for the deviations of the measured S-parameters of two-port test objects from their actual values are presented as functions of the deviations of the S-parameters of the LRL/TRL calibration elements from their ideal values. The obtained sensitivity coefficients are suitable for establishing the Type-B uncertainty budget for S-parameter measurements. They show how the measurements are affected by imperfect calibration elements and nonideal connections.