Linearization Study of a Highly Efficient CMOS-GaN RF Pulse Width Modulation Based Transmitter
Paper i 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%.
Författare
MUSTAFA ÖZEN
Gigahertzcentrum
Chalmers, Mikroteknologi och nanovetenskap, Mikrovågselektronik
Christer Andersson
Chalmers, Mikroteknologi och nanovetenskap, Mikrovågselektronik
Gigahertzcentrum
Thomas Eriksson
Chalmers, Signaler och system, Kommunikation, Antenner och Optiska Nätverk
Gigahertzcentrum
Mustafa Acar
Hendrikus Jos
Christian Fager
Chalmers, Mikroteknologi och nanovetenskap, Mikrovågselektronik
Gigahertzcentrum
European Microwave Conference
136-139
Styrkeområden
Informations- och kommunikationsteknik
Ämneskategorier
Elektroteknik och elektronik
DOI
10.23919/eumc.2012.6459115