S-parameters of slotted and slotless coaxial connectors

Accurate calibrations of vector network analyzers require that coaxial connectors are considered in the definition of calibration standards. In this paper the S-parameters of 2.4 mm and 1.85 mm connectors are computed using 3D field simulations. It is found that male pin diameter variations have lower impact on slotless 2.4 mm connectors than on slotted 1.85 mm connectors. Performing calibrations with and without taking into account the true S-parameters of the connectors results in a typical difference |¿S₁₁| = 0.01...0.02 for female 2.4 mm devices under test.