Linearization Study of a Highly Efficient CMOS-GaN RF Pulse Width Modulation Based Transmitter
Paper in proceeding, 2012
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%.
Author
MUSTAFA ÖZEN
GigaHertz Centre
Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics
Christer Andersson
Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics
GigaHertz Centre
Thomas Eriksson
Chalmers, Signals and Systems, Communication, Antennas and Optical Networks
GigaHertz Centre
Mustafa Acar
Hendrikus Jos
Christian Fager
Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics
GigaHertz Centre
European Microwave Conference
136-139
Areas of Advance
Information and Communication Technology
Subject Categories
Electrical Engineering, Electronic Engineering, Information Engineering
DOI
10.23919/eumc.2012.6459115