TY - JOUR
T1 - Compact Doherty Power Amplifier Design for 2 × 2 Multiple-Input Multiple-Output System
AU - Chen, Shichang
AU - Cheng, Zhiqun
AU - Wang, Gaofeng
AU - Xue, Quan
PY - 2016/3/1
Y1 - 2016/3/1
N2 - A triple-transistor Doherty power amplifier (PA) architecture that supports two identical input and output signals is investigated. Two peaking PAs and a single carrier PA are arranged to operate at high and low power regions. This structure can be used in 2 × 2 multiple-input multiple-output transceiver. Compared with classic configuration that needs four transistors to realize the same functionality, the proposed design greatly reduces the overall circuit size and cost. Theoretical analysis is given for deep understanding of the operational principle regarding this novel Doherty PA. To validate the effectiveness, a prototype PA corresponding to the proposed architecture is implemented based on Cree's gallium nitride high electron mobility transistor transistors. Experimental results demonstrate very high drain efficiencies at both saturation and back-off regions.
AB - A triple-transistor Doherty power amplifier (PA) architecture that supports two identical input and output signals is investigated. Two peaking PAs and a single carrier PA are arranged to operate at high and low power regions. This structure can be used in 2 × 2 multiple-input multiple-output transceiver. Compared with classic configuration that needs four transistors to realize the same functionality, the proposed design greatly reduces the overall circuit size and cost. Theoretical analysis is given for deep understanding of the operational principle regarding this novel Doherty PA. To validate the effectiveness, a prototype PA corresponding to the proposed architecture is implemented based on Cree's gallium nitride high electron mobility transistor transistors. Experimental results demonstrate very high drain efficiencies at both saturation and back-off regions.
KW - Doherty power amplifier
KW - drain efficiency
KW - load modulation network
KW - MIMO
UR - http://www.scopus.com/inward/record.url?scp=84959419796&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84959419796&origin=recordpage
U2 - 10.1109/LMWC.2016.2526024
DO - 10.1109/LMWC.2016.2526024
M3 - RGC 21 - Publication in refereed journal
SN - 1531-1309
VL - 26
SP - 216
EP - 218
JO - IEEE Microwave and Wireless Components Letters
JF - IEEE Microwave and Wireless Components Letters
IS - 3
M1 - 7416187
ER -