Advanced Calibration Techniques for VNAs

Which Standards Should I Use?• For broadband applications, shorts or opens work equally well• Choose the most convenient standard (often an open) –this is a key benefit of Automatic Port Extensions• Will using both an open and a short improve accuracy?– Using two standards makes little difference for broadbandmeasurements, as many ripples occur and calculated loss is the samefor open or short– Using two standards improves accuracyfor narrowband measurements, where afull ripple cycle does not occurshortCalculated loss is basicallysame for open or shortopenBroadbandAdvanced VNA Calibration© Agilent Technologies, Inc. 2006 Page M6- 55