To fill the gap of intermediate frequencies 100 kHz–100 MHz for which still remains a lack of traceability of impedance measurements for recent measurement instruments, LNE has established the traceability of a 4 ports vector network analyzer (VNA) and applied the method of Suzuki to measure four terminal pair impedances (Z4TP). In order to establish the traceability of the 4 ports VNA, used to measure Z4TP, LNE has investigated successively two different ways. We have developed 4TP calculable thin-film resistors, and then we have established the traceability of the “Unknown Thru” calibration method. We will show the two approaches and the measurement results up to 10 MHz obtained for a 1 000 pF capacitor with the associated uncertainties.

Key words

Vector Network Analyzer
Calculable Resistance