A 2.0 GHz CMOS triple cascode push-pull power amplifier with second harmonic injection for linearity enhancement

Author

Terajima, Kazuma ; Fujii, Kenichi ; Sonoda, Takuji ; Takagi, Toshiyuki ; Nakayama, Eita ; Kameda, Suguru ; Suematsu, Noriharu ; Tsubouchi, Kazuo

Author_Institution

Wave Technol. Inc., Kawanishi, Japan

fYear

2014

fDate

6-7 Oct. 2014

Firstpage

321

Lastpage

324

Abstract

A novel linearization technique to a CMOS push-pull power amplifier (PA) by second harmonic injection has been proposed. In order to inject second harmonics to the PAs, a new balun with a branching filter has been proposed and fabricated by using multi-layered organic substrates. The PA was fabricated in 0.18-μm CMOS process and was implemented on the balun by flip-chip connection. Because of the low breakdown voltage of CMOS power transistors, triple cascode configuration was adapted. The proposed push-pull PA has delivered an output power of 28.6 dBm with a power-added efficiency (PAE) of 42.2 % at 2.0 GHz and 5.4 V supply voltage. It has been also demonstrated that using second harmonic injection from input port of the PA, PAE and output power with a wideband code division multiple access (WCDMA) modulated signal are improved by 5 % and 2.0 dB respectively at adjacent channel leakage power ratio (ACLR) of -39 dBc.

Keywords

CMOS integrated circuits; UHF filters; UHF power amplifiers; baluns; code division multiple access; flip-chip devices; linearisation techniques; power transistors; ACLR; CMOS power transistors; CMOS triple cascode push-pull power amplifier; WCDMA; adjacent channel leakage power ratio; balun; branching filter; breakdown voltage; efficiency 42.2 percent; flip-chip connection; frequency 2.0 GHz; linearity enhancement; linearization technique; modulated signal; multilayered organic substrates; second harmonic injection; size 0.18 mum; triple cascode configuration; voltage 5.4 V; wideband code division multiple access; CMOS integrated circuits; Harmonic analysis; Impedance matching; Multiaccess communication; Power generation; Power harmonic filters; CMOS power amplifiers (PA); adjacent channel leakage power ratio (ACLR); balun; harmonic injection; linearity; planar balun; wideband code division multiple access (WCDMA);

fLanguage

English

Publisher

ieee

Conference_Titel

European Microwave Integrated Circuit Conference (EuMIC), 2014 9th

Conference_Location

Rome

Type

conf

DOI

10.1109/EuMIC.2014.6997857

Filename

6997857