Linearization Study of a Highly Efficient CMOS-GaN RF Pulse Width Modulation Based Transmitter

ÖZEN, MUSTAFA, 1984 (author): Chalmers tekniska högskola,Chalmers University of Technology

Andersson, Christer, 1982 (author): Chalmers tekniska högskola,Chalmers University of Technology

Eriksson, Thomas, 1964 (author): Chalmers tekniska högskola,Chalmers University of Technology

Acar, Mustafa (author)

Jos, Hendrikus, 1954 (author)

Fager, Christian, 1974 (author): Chalmers tekniska högskola,Chalmers University of Technology

(creator_code:org_t)

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Abstract Subject headings

This paper studies linearity of a 2 GHz, 10 Watt peak output power RF pulse width modulation (RF-PWM) based transmitter. The transmitter incorporates a tunable load network class-E PA as the final output stage. The tunable load network enables dynamic optimization of the class-E along with the duty cycle resulting in high efficiency over a wide range of output power levels. A digital predistiortion based linearization scheme is proposed to enhance the linearity of the transmitter. After linearization, the transmitter exhibits an adjacent channel power ratio (ACPR) of -45 dBc with a 3.84 MHz, 6.7 dB peak-to-average power ratio (PAPR) W-CDMA signal. The average drain efficiency of the GaN HEMT output stage is 67% and the total transmitter efficiency is 54%.

By the author/editor: ÖZEN, MUSTAFA, 1 ...; Andersson, Chris ...; Eriksson, Thomas ...; Acar, Mustafa; Jos, Hendrikus, ...; Fager, Christian ...

About the subject

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