Results 201 to 210 of about 2,179 (234)
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2009
The Doherty power amplifier (DPA) is hereby presented and described starting from the basic idea up to more advanced and state-of-art results and guidelines. The DPA historical aspect is also covered, describing the timeline of its evolution. Moreover, the reasons related to why this architecture, roughly 80 years after its invention, is still on its ...
COLANTONIO, PAOLO +3 more
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The Doherty power amplifier (DPA) is hereby presented and described starting from the basic idea up to more advanced and state-of-art results and guidelines. The DPA historical aspect is also covered, describing the timeline of its evolution. Moreover, the reasons related to why this architecture, roughly 80 years after its invention, is still on its ...
COLANTONIO, PAOLO +3 more
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Focusing on Doherty Power Amplifiers for S-Band
2012 19th International Conference on Microwaves, Radar & Wireless Communications, 2012The aim of this paper is to provide an overview of the actual state-of-art about the Doherty Power Amplifier (DPA) for S-Band application and to present a new realization using GaN devices able to provide 41dBm saturated output power with 60% drain efficiency and 10dB gain at 2.14GHz.
GIOFRE', ROCCO +3 more
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Advanced doherty amplifier for parallel amplification
IET International Radar Conference 2015, 2015A triple-transistor Doherty power amplifier (PA) architecture supports two in-phase input and output signals is proposed in this paper. To be specific, a single carrier PA is applied to operate in the low-power region, while two peaking PAs are used in the high-power region.
S. Chen, Q. Xue, G. Wang
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Analysis of the operation of a Hybrid amplifier based on the Doherty amplifier
2022 Asia-Pacific Microwave Conference (APMC), 2022Ren, Furumoto +2 more
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Doherty-to-Balanced Switchable Power Amplifier
2019 IEEE MTT-S International Microwave Symposium (IMS), 2019A novel Doherty-to-balanced (D2B) switchable power amplifiers (PAs) architecture based on branch-line quadrature hybrid couplers is presented. It is for the first time unveiled that by switching the 50-Ω loading at isolation port to a short circuit to ground, the balanced amplifier can be fully converted to a Doherty PA.
Haifeng Lyu, Yuchen Cao, Kenle Chen
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Odd-mode Doherty power amplifier
2016 IEEE MTT-S International Microwave Symposium (IMS), 2016This paper presents a novel doherty architecture, providing wideband efficient RF power amplification along-with wideband class-AB second harmonic terminations for a rugged and reliable operation. A prototype is developed, based on this architecture which provides more than 40% average efficiency at an average output power of 220W over most of the UHF ...
Jawad H. Qureshi +2 more
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Simplified Doherty power amplifier structures
2015 Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS), 2015We present two simplified Doherty power amplifier (DPA) structures to eliminate a quarter-wavelength impedance inverter used in the conventional DPA structure. The simplified DPA structures reduce the number of the impedance inverters, therefore they can be easily adopted in the broadband/multi-band applications of the DPA.
Han Ren +7 more
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Broadband doherty power amplifier and linearization
2016 46th European Microwave Conference (EuMC), 2016This paper will review the recent progress in broadband Doherty power amplifier (PA) and low feedback sampling rate digital predistortion (DPD) techniques. Continuous mode impedance matching method is proposed for Doherty PA for bandwidth enhancement, which utilizes the cross-matching technique to realize the physical output matching network.
Wenhua Chen, Xiaofan Chen, Zonghao Wang
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Doherty amplifier and antenna combiner
2019Mestrado em Engenharia Eletrónica e ...
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