TY - GEN
T1 - 2.8-3.8 GHz Broadband InGaP/GaAs HBT Doherty Power Amplifier IC for 5G New Radio Handset
AU - Oh, Hansik
AU - Choi, Woojin
AU - Koo, Hyungmo
AU - Shin, Jaekyung
AU - Chen, Yifei
AU - Jeon, Hyeongjin
AU - Choi, Youngchan
AU - Jung, Hoseok
AU - Hwang, Jiwon
AU - Yang, Youngoo
N1 - Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - This paper presents a 2.8-3.8 GHz broadband two-stage differential Doherty power amplifier using a 2-μm InGaP/GaAs HBT process for 5G new radio handset applications. A compact transformer-less interstage network is proposed for direct power division for carrier and peaking amplifiers. The power division ratio at the interstage was designed to be dynamically varying according to the input power level to have higher power gain and load impedance modulation for an operating frequency band of as broad as 1 GHz. In addition, active bias circuits for the peaking amplifier were optimized to have sufficient gain expansion so that the overall AM-AM characteristics is as flat as possible. Using the 5G new radio uplink signal with a signal bandwidth of 100 MHz, the implemented Doherty PA IC exhibited a power gain of 31.9 to 38.4 dB, PAE of 22.0 to 30.6%, and average output power of 26.0 to 27.8 dBm at a given ACLR of -33.0 dBc.
AB - This paper presents a 2.8-3.8 GHz broadband two-stage differential Doherty power amplifier using a 2-μm InGaP/GaAs HBT process for 5G new radio handset applications. A compact transformer-less interstage network is proposed for direct power division for carrier and peaking amplifiers. The power division ratio at the interstage was designed to be dynamically varying according to the input power level to have higher power gain and load impedance modulation for an operating frequency band of as broad as 1 GHz. In addition, active bias circuits for the peaking amplifier were optimized to have sufficient gain expansion so that the overall AM-AM characteristics is as flat as possible. Using the 5G new radio uplink signal with a signal bandwidth of 100 MHz, the implemented Doherty PA IC exhibited a power gain of 31.9 to 38.4 dB, PAE of 22.0 to 30.6%, and average output power of 26.0 to 27.8 dBm at a given ACLR of -33.0 dBc.
KW - 5G new radio
KW - differential power amplifier
KW - direct power division
KW - Doherty power amplifier
KW - InGaP/GaAs HBT
KW - transformer-less interstage
UR - https://www.scopus.com/pages/publications/85137977229
U2 - 10.1109/IMS37962.2022.9865575
DO - 10.1109/IMS37962.2022.9865575
M3 - Conference contribution
AN - SCOPUS:85137977229
T3 - IEEE MTT-S International Microwave Symposium Digest
SP - 849
EP - 852
BT - 2022 IEEE/MTT-S International Microwave Symposium, IMS 2022
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2022 IEEE/MTT-S International Microwave Symposium, IMS 2022
Y2 - 19 June 2022 through 24 June 2022
ER -