A method and apparatus are used to calibration a Vector Network Analyzer (VNA).
The method includes providing a calibration module with a single port, providing
within the calibration module a set of reflecting components with known scattering
parameters, providing control signals to the calibration module through the single
port, providing the known scattering parameters to the VNA through the single port,
coupling one of reflecting components to the VNA, measuring scattering parameters,
and comparing the measured scattering parameters with the known scattering parameters.
The apparatus includes a calibration module and a controller module. In one embodiment,
the calibration module includes a set of reflecting components, a memory that stores
the characterization data, and a current source which sends characterization data
in the form of current pulses to the controller module. The controller module includes
a voltage source that generates the control signals used by the calibration module.
