Inverted asymmetric Doherty power amplifier driven by two-stage symmetric Doherty amplifier

Abstract This paper presents a new Doherty power amplifier (DPA) with harmonics suppression. A Wilkinson power divider (WPD) with open-ended and short-ended stubs is designed to suppress unwanted signals. To design the power divider in the circuit of the DPA, even and odd mode analyses are utilized. The proposed design operates at range of 1.2–1.6 GHz. The linearity of the suggested DPA is increased about 6 dBm, in comparison with the main amplifier. The designed Doherty amplifier has a power added efficiency (PAE), drain efficiency (DE) and Gain about 60, 61% and 19 dB, respectively. The designed WPD suppresses 2nd up to 14th harmonics with more than 20 dB suppression level, which is useful for suppressing unwanted harmonics in DPA design. ATF-34143 transistors (pHEMT technology) are used for this DPA amplifier design. The main amplifier has class-F topology and class-F inverse topology is used for auxiliary amplifier.

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Two-stage integrated doherty power amplifier with extended instantaneous bandwidth for 4/5g wireless systems

2017 IEEE MTT-S International Microwave Symposium (IMS) ◽

10.1109/mwsym.2017.8058826 ◽

2017 ◽

Cited By ~ 1

Author(s):

Seungkee Min ◽

Henry Christange ◽

Margaret Szymanowski

Keyword(s):

Power Amplifier ◽

Wireless Systems ◽

Two Stage ◽

Doherty Power Amplifier

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Application of New Matching Technique in Doherty Amplifier

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.278-280.1091 ◽

2013 ◽

Vol 278-280 ◽

pp. 1091-1094

Author(s):

Jun Chen ◽

Guo Qing Shen ◽

Kai Xiong Su

Keyword(s):

Low Power ◽

Power Amplifier ◽

Computer Software ◽

High Linearity ◽

Matching Technique ◽

Power Operation ◽

Doherty Power Amplifier ◽

Doherty Amplifier

According to the shortage of the traditional offset line in Doherty power amplifier, a new offset line technique is proposed to match carrier amplifier with the load and to improve the performance of the Doherty amplifier. By simulation of the computer software, a higher efficiency is obtained using the new offset line comparing the two kinds of offset lines. The new offset line matching technique could be applied in the system with high linearity and low power operation.

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A Novel Two-Stage Broadband Doherty Power Amplifier for Wireless Applications

IEEE Microwave and Wireless Components Letters ◽

10.1109/lmwc.2017.2775157 ◽

2018 ◽

Vol 28 (1) ◽

pp. 40-42 ◽

Cited By ~ 9

Author(s):

Muhammad Saad Khan ◽

Hongxin Zhang ◽

Xueli Wang ◽

Rahat Ullah ◽

Ibrar Ahmad ◽

...

Keyword(s):

Power Amplifier ◽

Two Stage ◽

Wireless Applications ◽

Doherty Power Amplifier

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A Review of Efficiency Improvement Techniques in Modern Communication Systems

Journal of University of Shanghai for Science and Technology ◽

10.51201/jusst/21/07196 ◽

2021 ◽

Vol 23 (07) ◽

pp. 656-658

Author(s):

Peddi Saurabh ◽

◽

Poornima Asuti ◽

Prof. Deepika P ◽

◽

...

Keyword(s):

Power Amplifier ◽

Communication Systems ◽

Research Trends ◽

Efficiency Improvement ◽

Operational Principle ◽

Doherty Power Amplifier ◽

Doherty Amplifier

This paper discusses Doherty Power Amplifier(DPA) and its evolution over the years. The basic operational principle of the Doherty amplifier and its defective behavior that has been originated by transistor characteristics will be presented. The different research trends, all aimed to improve the advantages of the Doherty scheme and to solve its inherent drawbacks, are discussed.

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