IMPROVED UHF NONLINEAR MEASUREMENTS USING ACTIVE LOAD PULL.

The article examines the use of the active load pull technology which simplifies ultrahigh frequency (UHF) testing and removes limitations and inaccuracies common to passive load pull measurements. It notes that open-loop, active load pull uses a separate coherent signal source to stimulate either the source or load side of the device under test (DUT). The open-loop system absorbs the signal and injects a signal that is generated by an independent source back into the device.