Title :
Active fixture with passive tuners for full-range load-pull measurements
Author :
Halder, Subrata ; Hwang, James C M
Author_Institution :
Lehigh Univ., Bethlehem, PA, USA
Abstract :
The lossy cable in a conventional load-pull setup was replaced with an active fixture to realize full tuning range by using passive electromechanical tuners. The approach was validated in small-signal characterization of a through line up to the edge of the Smith chart, as well as large-signal characterization of a heterojunction bipolar transistor up to a voltage standing-wave ratio of 10:1. The approach is simpler than active load-pull setups and it significantly enhances the capabilities of conventional load-pull setups, especially in the characterization of high-power transistors with very low matching impedances.
Keywords :
electric impedance measurement; heterojunction bipolar transistors; impedance matching; microwave power amplifiers; Smith chart; active fixture; conventional load pull setup; full range load pull measurements; full tuning range; heterojunction bipolar transistor; high power transistors; matching impedances; passive electromechanical tuners; voltage standing wave ratio; Fixtures; Heterojunction bipolar transistors; Impedance; Microwave amplifiers; Microwave transistors; Tuners; Impedance matching; impedance measurement; microwave measurements; microwave power amplifiers; tuners;
Conference_Titel :
Microwave Integrated Circuits Conference (EuMIC), 2011 European
Conference_Location :
Manchester
Print_ISBN :
978-1-61284-236-3
