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

fYear

2011

fDate

10-11 Oct. 2011

Firstpage

85

Lastpage

88

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Integrated Circuits Conference (EuMIC), 2011 European

Conference_Location

Manchester

Print_ISBN

978-1-61284-236-3

Type

conf

Filename

6102800