Broadband GaN-Based Switch-Mode Core MMICs with 20 W Output Power Operating at UHF

Author

Maroldt, Stephan ; Quay, Rüdiger ; Haupt, Christian ; Ambacher, Oliver

Author_Institution

Fraunhofer Inst. for Appl. Solid State Phys., Freiburg, Germany

fYear

2011

fDate

16-19 Oct. 2011

Firstpage

1

Lastpage

4

Abstract

A high power broadband switch-mode core MMIC has been developed for an application in digital switch-mode power amplifiers, e.g., class S, for mobile communications. The three-stage design can be flexibly used at any frequency operating in UHF band up to a maximum digital bit rate of 3 Gbps, equal to a square wave frequency of 1.5 GHz. At 0.9 Gbps a maximum broadband output power of 20.5 W was measured at a drain efficiency of 76% and a power added efficiency of 70%. Controlled by a digital signal with a peak-to-peak amplitude of 3.5 V, a large signal gain of 25.3 dB was achieved.

Keywords

III-V semiconductors; MMIC amplifiers; UHF amplifiers; mobile communication; power amplifiers; wideband amplifiers; GaN; UHF; bit rate 0.9 Gbit/s; bit rate 3 Gbit/s; broadband switch-mode core MMIC; digital switch-mode power amplifier; frequency 1.5 GHz; gain 25.3 dB; mobile communication; power 20 W; power 20.5 W; three-stage design; voltage 3.5 V; Bit rate; MMICs; Power amplifiers; Power generation; Switches; Switching circuits; Voltage measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Compound Semiconductor Integrated Circuit Symposium (CSICS), 2011 IEEE

Conference_Location

Waikoloa, HI

ISSN

1550-8781

Print_ISBN

978-1-61284-711-5

Electronic_ISBN

1550-8781

Type

conf

DOI

10.1109/CSICS.2011.6062483

Filename

6062483