Establishment of S-parameter Traceability for 3.5 mm Coaxial Lines from 10 MHz to 100 MHz

摘要

This paper describes the National Metrology Institute of Japan's (NMIJ) development of the International System of Units (SI) traceable S-parameter standard and measurement techniques in 3.5 mm coaxial lines at radio frequencies (from 10 to 100 MHz). The primary standard is a 300-mm-length air line. The S-parameters of the air line were evaluated by measuring the dimensions and the insertion loss. Using the offset load method, the reflection coefficient of a matched load termination was characterized to perform thru–reflect–match calibrations in vector network analyzer measurements. The uncertainty of the matched load termination, estimated by Monte Carlo simulations, was approximately 0.001 at 100 MHz.