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.

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.

Analysis of load mismatch effect compensation in Doherty power amplifier

2020 ◽  
pp. 1-12
Author(s):  
Alexis Courty ◽  
Pierre Medrel ◽  
Tibault Reveyrand ◽  
Philippe Bouysse ◽  
Jean-Michel Nébus ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Output Power ◽  
Power Amplifier ◽  
Experimental Analysis ◽  
Harmonic Balance ◽  
Analytical Study ◽  
Large Signal ◽  
Doherty Power Amplifier ◽  
Linear Piecewise ◽  
Mismatch Effect

Abstract This paper presents a theoretical and experimental analysis of the capabilities of the dual-input Doherty power amplifier (DPA) architecture to mitigate efficiency and output power degradations when used in a mismatched load environment. Following a simplified linear piecewise approach, an analytical demonstration is proposed to derive optimal radio frequency drives applied to the Auxiliary path of the DPA to restore power performances while avoiding large signal voltage clipping of active cells. The proposed analytical study is corroborated with harmonic balance simulated results of a C-band, 20-W GaN DPA prototype. The fabricated dual-input DPA prototype has been measured under 1.5-VSWR mismatch configurations to validate the proposed analysis.

scholarly journals High efficiency Doherty power amplifier based on asymmetrical matching network

2021 ◽  
Vol 23 (2) ◽  
pp. 910
Author(s):  
Mussa Mabrok ◽  
Zahriladha Zakaria ◽  
Tole Sutikno
Keyword(s):  
Output Power ◽  
Power Amplifier ◽  
Communication Systems ◽  
High Efficiency ◽  
Design Strategy ◽  
Matching Network ◽  
High Data ◽  
Fifth Generation ◽  
Data Rates ◽  
Doherty Power Amplifier

Doherty power amplifier (DPA) with high efficiency at the output power back off is highly demanded for modern wireless communication systems to achieve high data rates and reduce the power consumption and operation costs. This paper presents a new design strategy for enhancing DPA’s back-off efficiency. New design strategy called asymmetrical matching network is used to achieve asymmetric operation, which helps to compensate for the low power delivered by the peaking stage in the conventional DPA. The simulation results showed an enhancement in the back-off efficiency, where the proposed design is able toachieve 46-52% drain efficiency at 8 dB output power back-off while maintains high efficiency of 73-80 % at saturation over the designed bandwidth of 3.4-3.6 GHz. The proposed design is suitable for high efficiency sub-6 GHz fifth-generation wireless applications.<br /><div> </div>

A 2.5GHZ-2.7GHz Unsymmetrical Doherty Power Amplifier with Digital Predistortion for LTE-Advanced Applications

2013 ◽  
Vol 760-762 ◽  
pp. 546-550 ◽  
Author(s):  
Wen Sheng Pan ◽  
Chuan Hui Ma ◽  
Shi Hai Shao ◽  
You Xi Tang
Keyword(s):  
Output Power ◽  
Power Amplifier ◽  
Power Efficiency ◽  
Continuous Wave ◽  
Digital Predistortion ◽  
Average Output ◽  
Lte Advanced ◽  
Saturation Power ◽  
Doherty Power Amplifier ◽  
Better Than

An unsymmetrical GaN based Doherty power amplifier (DPA) operating from 2.5GHz to 2.7GHz is presented in this paper. To achieve a good tradeoff among the output power, efficiency and bandwidth, the ladder-type multisection output matching networks are optimized for the carrier amplifier and the peaking amplifier, respectively. Measured with continuous wave (CW) signal, the broadband DPA provides more than 49dBm saturation power in the operating band. The drain efficiency is greater than 44% over 7dB back-off power. For a LTE-Advanced signal with 100MHz bandwidth, the drain efficiency is higher than 42% at an average output power of 41dBm, along with an adjacent channel leakage ratio (ACLR) of better than-49.9dBc after digital predistortion (DPD).

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