Optimized Envelope Tracking Operation of Doherty Power Amplifier for High Efficiency Over an Extended Dynamic Range

2009 ◽  
Vol 57 (6) ◽  
pp. 1508-1515 ◽  
Author(s):  
Jinsung Choi ◽  
Daehyun Kang ◽  
Dongsu Kim ◽  
Bumman Kim
Keyword(s):  
Power Amplifier ◽  
High Efficiency ◽  
Dynamic Range ◽  
Envelope Tracking ◽  
Doherty Power Amplifier ◽  
Extended Dynamic

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.

1-Package 500W High Efficiency LDMOS Doherty Power Amplifier

2018 ◽  
Author(s):  
Jean-Christophe Nanan ◽  
Yuanyuan Dong ◽  
Sandra De Meyer ◽  
Damien Scatamacchia
Keyword(s):  
Power Amplifier ◽  
High Efficiency ◽  
Doherty Power Amplifier

scholarly journals A Power Amplifier with Large High-Efficiency Range for 5G Communication

Sensors ◽  
2020 ◽  
Vol 20 (19) ◽  
pp. 5581
Author(s):  
Zhiwei Zhang ◽  
Zhiqun Cheng ◽  
Guohua Liu
Keyword(s):  
Output Power ◽  
Design Process ◽  
Power Amplifier ◽  
High Efficiency ◽  
New Method ◽  
Saturated Output Power ◽  
Doherty Power Amplifier ◽  
5G Communication

This paper presents a new method to design a Doherty power amplifier (DPA) with a large, high-efficiency range for 5G communication. This is through analyzing the drain-to-source capacitance (CDS) of DPAs, and adopting appropriate impedance of the peak device. A closed design process is proposed, to design the extended efficiency range DPA based on derived theories. For validation, a DPA with large efficiency range was designed and fabricated by using two equal devices. The measured results showed that the saturated output power was between 43.4 dBm and 43.7 dBm in the target band. Around 70% saturated drain efficiency is obtained with a gain of greater than 11 dB. Moreover, the obtained drain efficiency is larger than 50% at the 10 dB power back-off, when operating at 3.5 GHz. These superior performances illustrate that the implemented DPA can be applied well in 5G communication.

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