Paper Info
Title
Bandwidth Enhancement Of Three-Device Doherty Power Amplifier Based On Symmetric Devices
Abstract
This paper proposes a method for extending the bandwidth of a three-device Doherty power amplifier (DPA) based on symmetric devices. lambda/4 transmission lines are inserted between each peaking amplifier output and carrier amplifier output to compensate load impedance of carrier amplifier. In order to achieve perfect load modulation, carrier amplifier output circuit total electrical length is designed to 90 degrees, and the peak amplifier output total electrical length is designed to 180 degrees. The proposed method is demonstrated by designing a three-device broadband DPA using three 10-W packaged GaN HEMT devices. Measurement results show that over 40% drain efficiency is achieved at 9-dB back-off power, over the frequency band of 1.45-2.35 GHz, accounting for 46% fractional bandwidth.
Year
DOI
Venue
2018
10.1587/elex.15.20171222
IEICE ELECTRONICS EXPRESS
Keywords
Field
DocType
Doherty power amplifier, broadband, drain efficiency, three-device, symmetric devices
Frequency band,Computer science,Electrical length,Electric power transmission,Modulation,Electronic engineering,Bandwidth (signal processing),High-electron-mobility transistor,Input impedance,Electrical engineering,Amplifier
Journal
Volume
Issue
ISSN
15
3
1349-2543
Citations 
PageRank 
References 
0
0.34
0
Authors
5
Name
Order
Citations
PageRank
Guo-hua Liu110234.53
Zhi-Qun Cheng213.79
Ming Zhang323248.14
Shichang Chen492.75
Steven Gao578.86