Design of Doherty Power Amplifier Using Load-pull X-Parameters

2021 ◽  
Author(s):  
Meilin Wu ◽  
Yan Qu ◽  
Jia Guo ◽  
Chao Yu ◽  
Jialin Cai
Keyword(s):  
Power Amplifier ◽  
Doherty Power Amplifier ◽  
Load Pull

scholarly journals Asymmetric Doherty Power Amplifier with Input Phase/Power Adjustment and Envelope Tracking

Electronics ◽  
2021 ◽  
Vol 10 (19) ◽  
pp. 2327
Author(s):  
Fei Yang ◽  
Jun Li ◽  
Hongxi Yu ◽  
Sen Yan ◽  
Anxue Zhang ◽  
...  
Keyword(s):  
Power Amplifier ◽  
Dynamic Range ◽  
High Electron Mobility Transistors ◽  
Input Power ◽  
High Electron ◽  
Envelope Tracking ◽  
Electron Mobility Transistors ◽  
Power Adjustment ◽  
Doherty Power Amplifier ◽  
Load Pull

In this paper, the design and implementation of a Doherty power amplifier (DPA) are proposed using gallium nitride high electron mobility transistors (GaN HEMTs). Class-F and Class-C modes are combined to obtain an asymmetric DPA. The precise active load-pull controlling of fundamental and harmonic terminations of the DPA is simulated and analyzed, including the parasitics of the transistors. The measurements of the DPA with the phase difference, input power ratio adjustment, and envelope tracking of the auxiliary PA are discussed in detail in order to achieve a competitive performance. A greater than 63% drain efficiency is obtained within the 10-dB input power dynamic range at 2.1 GHz. The peak of the drain efficiency reaches 73%, with a corresponding output power of 46 dBm.

Design and Simulation of an Improved Doherty Power Amplifier

2014 ◽  
Vol 496-500 ◽  
pp. 1109-1112
Author(s):  
Yang Liu ◽  
Huai Bao Xiao
Keyword(s):  
Output Power ◽  
Power Amplifier ◽  
Wireless Transmitter ◽  
The Future ◽  
Doherty Power Amplifier ◽  
Load Pull

This work presents theory, design and simulation of an improved power amplifier based on the Doherty topology. It is theoretically shown that, by using multiple iterations of the source-pull and the load-pull in the platform of ADS with a Doherty power amplifier topology, the proposed amplifier can provide higher efficiency both at full output power and at back-off power, thus validating practical effects of the design and demonstrating a promising prospect of the design to be used in the future wireless transmitter applications.

Broadband Doherty Power Amplifier Based on Coupled Phase Compensation Network

2021 ◽  
pp. 1-1
Author(s):  
Xin Yu Zhou ◽  
Wing Shing Chan ◽  
Wenjie Feng ◽  
Xiaohu Fang ◽  
Tushar Sharma ◽  
...  
Keyword(s):  
Power Amplifier ◽  
Phase Compensation ◽  
Doherty Power Amplifier

An Extended-Bandwidth Three-Way Doherty Power Amplifier

2013 ◽  
Vol 61 (9) ◽  
pp. 3318-3328 ◽  
Author(s):  
Hamed Golestaneh ◽  
Foad Arfaei Malekzadeh ◽  
Slim Boumaiza
Keyword(s):  
Power Amplifier ◽  
Doherty Power Amplifier

The AB-C Doherty power amplifier. Part I: Theory

2009 ◽  
Vol 19 (3) ◽  
pp. 293-306 ◽  
Author(s):  
Paolo Colantonio ◽  
Franco Giannini ◽  
Rocco Giofrè ◽  
Luca Piazzon
Keyword(s):  
Power Amplifier ◽  
Doherty Power Amplifier
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