SYSTEM PERFORMS ACTIVE LOAD-PULL MEASUREMENTS

LOAD-PULL characterization of RP power transistors is critical for des igning the high intercept-point power amplifiers used in digital commu nications systems. Existing test systems that rely on mechanical and e lectrode tuners are complex to use and are limited in capability compa red to a novel load pull system that emulates a load to a device under test (DUT) by means of active feedback. The Active Load Pull System ( ALPS), developed bg Focus Microwaves, Inc. (Pointe-Claire, Quebec, Can ada), is currently available for measurements from 0.8 to 2.8 GHz.