TY - JOUR
T1 - 50% PAE WCDMA basestation amplifier implemented with GaN HFETs
AU - Kimball, Don
AU - Draxler, Paul
AU - Jeong, Jinho
AU - Hsia, Chin
AU - Lanfranco, Sandro
AU - Nagy, Walter
AU - Linthicum, Kevin
AU - Larson, Larry
AU - Asbeck, Peter
PY - 2005
Y1 - 2005
N2 - A high performance GaN HFET WCDMA basestation power amplifier is presented, which uses an envelope tracking bias system to achieve high linearity and efficiency. The measured overall power-added efficiency (PAE) reached 50.7 %, with a normalized power RMS error of 0.7% and ACLR of -52 dBc at an offset frequency of 5 MHz, at an average output power of 37.2 W and gain of 10.0 dB for a single carrier WCDMA signal. To the authors' knowledge, this corresponds to the best efficiency reported for a single stage base station power amplifier. Digital predistortion (DPD) was used at two levels: memoryless DPD to compensate for the expected gain variation of the amplifier over the bias envelope trajectory, and deterministic memory mitigation, to further improve the linearity. The signal envelope had a peak-to-average power ratio of 7.67 dB.
AB - A high performance GaN HFET WCDMA basestation power amplifier is presented, which uses an envelope tracking bias system to achieve high linearity and efficiency. The measured overall power-added efficiency (PAE) reached 50.7 %, with a normalized power RMS error of 0.7% and ACLR of -52 dBc at an offset frequency of 5 MHz, at an average output power of 37.2 W and gain of 10.0 dB for a single carrier WCDMA signal. To the authors' knowledge, this corresponds to the best efficiency reported for a single stage base station power amplifier. Digital predistortion (DPD) was used at two levels: memoryless DPD to compensate for the expected gain variation of the amplifier over the bias envelope trajectory, and deterministic memory mitigation, to further improve the linearity. The signal envelope had a peak-to-average power ratio of 7.67 dB.
KW - Base station power amplifier
KW - Digital predistortion
KW - Efficiency
KW - Envelope tracking
KW - GaN HFET
KW - WCDMA
UR - https://www.scopus.com/pages/publications/30944450427
U2 - 10.1109/CSICS.2005.1531768
DO - 10.1109/CSICS.2005.1531768
M3 - 会议文章
AN - SCOPUS:30944450427
SN - 1550-8781
SP - 89
EP - 92
JO - Technical Digest - IEEE Compound Semiconductor Integrated Circuit Symposium, CSIC
JF - Technical Digest - IEEE Compound Semiconductor Integrated Circuit Symposium, CSIC
M1 - LN.4
T2 - 2005 IEEE Compound Semiconductor Integrated Circuit Symposium, CSIC
Y2 - 30 October 2005 through 2 November 2005
ER -