High power density of AlGaAs/InGaAs doped-channel FETs with low DC power supply

H. C. Chiu*, S. C. Yang, F. T. Chien, Y. J. Chan

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

1 Scopus citations

Abstract

High power density Al0.3Ga0.7AS/In0.15Ga0.85As doped-channel FETs (modified DCFETs) biased at 3V for 2.4GHz wireless communication applications are proposed. A planar Si δ-doped layer is inserted inside the wide-bandgap undoped AlGaAs layer to reduce parasitic resistances and enhance the device microwave power performance. The modified DCFETs (M-DCFETs) exhibit an output power density of 302mW/mm, a power-added efficiency of 52%, and a linear power gain of 19dB under 2.4GHz operation for a 1 mm gate-width device. These characteristics suggest that doped-channel FETs with a planar Si δ-doped layer can be used in high linearity and high power microwave device applications.

Original languageEnglish
Pages (from-to)597-598
Number of pages2
JournalElectronics Letters
Volume37
Issue number9
DOIs
StatePublished - 26 04 2001
Externally publishedYes

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