TY - GEN
T1 - A CMOS envelope tracking power amplifier for 4G LTE mobile terminal applications
AU - Ham, Junghyun
AU - Yang, Youngoo
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/12/18
Y1 - 2014/12/18
N2 - An envelope tracking power amplifier (ET PA) using a standard CMOS process for the 3GPP long-term evolution mobile terminals is presented. An efficiency of the CMOS power amplifier for the modulated signals can be improved combining with a highly efficient and wideband CMOS bias modulator. The CMOS PA has a two-stage differential common-source structure for high gain and large voltage swing. The bias modulator has a hybrid structure which consists of a linear stage and a switching stage. The variable load condition according to the envelope signal level is taken into account for the bias modulator design. By applying the bias modulator to the power amplifier, the ET PA delivers a PAE of 41.7 % at an average output power of 24 dBm, which is 5.3 % points higher than that of the power amplifier alone at the same average output power and linearity.
AB - An envelope tracking power amplifier (ET PA) using a standard CMOS process for the 3GPP long-term evolution mobile terminals is presented. An efficiency of the CMOS power amplifier for the modulated signals can be improved combining with a highly efficient and wideband CMOS bias modulator. The CMOS PA has a two-stage differential common-source structure for high gain and large voltage swing. The bias modulator has a hybrid structure which consists of a linear stage and a switching stage. The variable load condition according to the envelope signal level is taken into account for the bias modulator design. By applying the bias modulator to the power amplifier, the ET PA delivers a PAE of 41.7 % at an average output power of 24 dBm, which is 5.3 % points higher than that of the power amplifier alone at the same average output power and linearity.
KW - bias modulator
KW - CMOS power amplifier (PA)
KW - Envelope tracking
KW - hybrid buck converter
KW - long term evlution (LTE)
KW - power amplifier
UR - https://www.scopus.com/pages/publications/84921341898
U2 - 10.1109/APCAP.2014.6992721
DO - 10.1109/APCAP.2014.6992721
M3 - Conference contribution
AN - SCOPUS:84921341898
T3 - Proceedings of 3rd Asia-Pacific Conference on Antennas and Propagation, APCAP 2014
SP - 1169
EP - 1171
BT - Proceedings of 3rd Asia-Pacific Conference on Antennas and Propagation, APCAP 2014
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 3rd Asia-Pacific Conference on Antennas and Propagation, APCAP 2014
Y2 - 26 July 2014 through 29 July 2014
ER -