Large Signal Network Analyzer Phase Calibration on an Arbitrary Grid

University of Colorado Boulder Background
Large-signal network analyzers add power and cross-frequency phase calibrations to the conventional vector-network-analyzer (VNA) scattering-parameter calibration. These additional calibration steps allow large-signal network analyzers (LSNAs) to measure not only scattering parameters, but the amplitude and phase of each of the forward and backward waves at the ports of the LSNA. This is useful for nonlinear device characterization and modulated-signal measurements.
The current methods used for transferring cross-frequency phase calibrations utilize comb generators, and suffer from frequency spacing and placement limitations. For example, as the frequency spacing is reduced, the total power available in the grid is also reduced, limiting the upper frequency limit of the LSNA.
Technology Overview
Researchers at the University of Colorado have discovered a novel method of improving the synchronization of large-signal network analyzers and transferring cross-frequency phase calibrations from a calibrated sampling oscilloscope to a large-signal vector network analyzer on an arbitrary frequency grid. This method offers a practical and accurate way of transferring oscilloscope cross-frequency phase calibrations to large-signal network analyzers on arbitrary frequency grids and can be used to characterize any signal created by an arbitrary waveform generator (AWG) used in the measurement apparatus.

Further Details:
Large-Signal Network Analyzer Phase Calibration on an Arbitrary Grid
Stage of Development
Proof of concept.

Increased accuracy
Uses commercially available instrumentation
Improved tracking abilities
Improved dynamic measurement
Enables phase lock implementation at high frequencies


High frequency electronics
Transistor design and testing
Measurement of complex and arbitrarily long signals
Wireless systems
Large-signal network analyzers
Phase calibration

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