Abstract: As a main measurement parameter of mixers’ transfer characteristic, a new frequency conversion Loss measurement method by VNA with a frequency conversion option is proposed. Conclude from measurement result and analysis, the mismatch error is a large contribution to the whole measurement error. An algorithm correction model is proposed to correct the measurement result. Power calibration is adopted to improve the measurement accuracy of VNA. Along with simplifying the measurement mechanism and measurement process, the new measurement method improves the measurement accuracy and repeatability as well.

Key words: Frequency conversion loss, Mixer, Mismatch, Error correction model