CCEM key comparison CCEM.RF-K5c.CL

An international measurement comparison, identified as CCEM.RF-K5c.CL, for scattering parameters and reflection coefficients by broad-band method was conducted between twenty national metrology institutes. The purpose of the comparison is to establish the calibration measurement capability of each participating laboratory. This report presents the key comparison reference values and degree of equivalence of each participant with respect to the key comparison reference values of the comparison. The participants measured seven travelling standards, an adapter, a 20 dB attenuator, a 40 dB attenuator, two matched terminations, and two flush short terminations with 3.5 mm coaxial connectors from 0.1 GHz to 33 GHz. The pilot laboratory is National Metrology Institute of Japan (NMIJ) and the supporting laboratories are Federal Institute of Metrology (METAS) and National Physical Laboratory (NPL), National Institute of Metrology (NIM), and National Institute of Standards and Technology (NIST). Most of the reported measurement results were generally consistent, while there was a small number of outlying values.