A Commercial Implementation of Modal Calibration to Improve GSSG Calibration

In RF testing, the goal of calibration is to remove the effects of the test setup, including cables, connectors, and adapters, so that the measured results accurately reflect the Device Under Test (DUT) itself. However, performing accurate on-wafer calibrations is challenging, particularly for differential topologies, as the coupling inherent to these precludes accurate measurements unless accounted for. Most traditional RF calibrations do not compensate for this coupling, resulting in inaccurate, and in some cases physically implausible, measurements.

Modal Calibration is one technique to characterise and remove this crosstalk, and is now available, for the first time, in a commercial calibration software.

This webinar will discuss RF calibration techniques, their limitations as applied to differential topologies, and present the Modal Calibration algorithm. Real-world validation results will be demonstrated to illustrate the accuracy improvements which can accrue from its use.