Comparison of the load-pull power characteristics of common-emitter and common-base heterojunction bipolar transistors

Author

Samelis, A. ; Pavlidis, D. ; Pehlke, D.R. ; Ho, W.J. ; Higgins, J.A. ; Sailer, A.

Author_Institution

Solid State Electron. Lab., Michigan Univ., Ann Arbor, MI, USA

fYear

1995

fDate

7-9 Aug 1995

Firstpage

243

Lastpage

252

Abstract

The power characteristics of common-emitter and common-base AlGaAs-GaAs based HBTs are compared using on-wafer load/pull measurements. Gain compression is more pronounced for common-base HBTs. The sensitivity of the device gain on the load termination conditions is smaller for common-emitter than common-base HBTs. Device self-bias is strongly dependent on load termination at high power levels for CE but not for CB HBTs. As a result, a unique load termination exists resulting in both maximum gain and power added efficiency in the case of CB HBTs. In the case of CE HBTs optimum load terminations can be selected through tradeoffs between the output power and efficiency load-pull contours

Keywords

III-V semiconductors; S-parameters; aluminium compounds; gallium arsenide; heterojunction bipolar transistors; microwave bipolar transistors; microwave measurement; microwave power transistors; power bipolar transistors; semiconductor device testing; 8 GHz; AlGaAs-GaAs; HBT optimum load terminations; SHF; common-base HBT; common-emitter HBT; device self-bias; gain compression; heterojunction bipolar transistors; load-pull power characteristics; onwafer load/pull measurements; Bipolar transistors; Frequency; Gallium arsenide; Heterojunction bipolar transistors; Laboratories; Power amplifiers; Power generation; Power measurement; Solid state circuits; Tuners;

fLanguage

English

Publisher

ieee

Conference_Titel

High Speed Semiconductor Devices and Circuits, 1995. Proceedings., IEEE/Cornell Conference on Advanced Concepts in

Conference_Location

Ithaca, NY

ISSN

1079-4700

Print_ISBN

0-7803-3970-3

Type

conf

DOI

10.1109/CORNEL.1995.482441

Filename

482441