Advanced Calibration Techniques for VNAs
Advanced Calibration Techniques for VNAs
Advanced Calibration Techniques for VNAs
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Automatic Port Extensions – Step 2• After coaxial calibration, connect an open or short to the portion of fixturebeing measured (will be repeated <strong>for</strong> all ports of text fixture)• Per<strong>for</strong>m APE: algorithm measures each portion of fixture and computesinsertion loss and electrical delay• Values calculated by APE are entered into port extension feature• Now, only fixture mismatch remains as source of error(dominated by coaxial connector).Coaxial calibrationreference planesOpen or shortplaced at end of eachtransmission linePortsextendedPort extensions withloss and delay providea response calibrationof the test fixture<strong>Advanced</strong> VNA <strong>Calibration</strong>© Agilent Technologies, Inc. 2006 Page M6- 52
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