Advanced Calibration Techniques for VNAs
Advanced Calibration Techniques for VNAs
Advanced Calibration Techniques for VNAs
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Unknown Thru <strong>for</strong> Different Waveguide Bands• Calibrate each waveguide adapter with appropriate waveguide cal kit• Watch out <strong>for</strong> these potential problems:• Non-overlapping waveguide bands• Attenuation near cutoff may be too high <strong>for</strong> thru calibration• Undesired higher-order modes(longer adapters provide better attenuation <strong>for</strong> higher-order modes)1-port waveguide calsBand XBand YLong enough?Tapered orstepped adapterHigher cutoff frequency<strong>Advanced</strong> VNA <strong>Calibration</strong>© Agilent Technologies, Inc. 2006 Page M6- 29