Toward a More Generalized Doherty Power Amplifier Design for Broadband Operation

Barakat, Ayman; Thian, Mury; Fusco, Vincent; Bulja, Senad; Guan, Lei

doi:10.1109/tmtt.2016.2633261

Cited by 66 publications

(24 citation statements)

References 41 publications

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“…In [23], a generalized design approach was presented for this DPA architecture. Assuming transistors with the same optimum load resistance, it is shown that to achieve broadband efficiency at back-off and peak power, the characteristic impedances of the transmission lines should be chosen as…”

Section: Dpa Bandwidth Extension Techniquesmentioning

confidence: 99%

“…The DPAs reported in [19], [20], [21] are special cases of this architecture with m of 0.6, 0.6, and 0.4, respectively. A GaN DPA presented in [23] was based on a class-E PA and the output combiner with m = 0.5, achieving drain efficiency of 39-67% at 6-dB back-off in 2.1-2.66 GHz (24%). In [21], [22] a GaN DPA is designed using this architecture with drain efficiency of 35-58% at 6-dB backoff in 1.0-2.6 GHz (83%).…”

Section: Dpa Bandwidth Extension Techniquesmentioning

confidence: 99%

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Breaking the Bandwidth Limit: A Review of Broadband Doherty Power Amplifier Design for 5G

2020

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Section: Dpa Bandwidth Extension Techniquesmentioning

confidence: 99%

Section: Dpa Bandwidth Extension Techniquesmentioning

confidence: 99%

Breaking the Bandwidth Limit: A Review of Broadband Doherty Power Amplifier Design for 5G

2020

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“…The impedance transformation ratio is analyzed to enhance efficiency and bandwidth. 1,2 The noninfinite peaking impedance at the low output power 3 and the complex load impedance 4 are used to optimize the fundamental impedance, which are also combined for the larger bandwidth extension. 5 However, these methods are only to optimize the fundamental impedance, with the harmonic impedance ignored.…”

Section: Introductionmentioning

confidence: 99%

“…Up to now, the broadband DPA has been researched widely. The impedance transformation ratio is analyzed to enhance efficiency and bandwidth 1,2 . The noninfinite peaking impedance at the low output power 3 and the complex load impedance 4 are used to optimize the fundamental impedance, which are also combined for the larger bandwidth extension 5 .…”

Section: Introductionmentioning

confidence: 99%

Highly efficient Doherty power amplifier using continuous inverseclass‐Fandclass‐Jhybrid mode

Wang

Cheng

2020

Int J RF Microw Comput Aided Eng

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A continuous inverse class-F (CCF −1) and class-J hybrid mode for the carrier power amplifier (PA) of the Doherty power amplifier (DPA) is proposed in this paper. In this hybrid mode, the carrier PA works in the CCF −1 mode at the saturated output power and the class-J mode at the low output power, which extends the design space of the conventional single continuous mode. A highly efficient Doherty power amplifier based on this hybrid mode is designed and fabricated using a CGH40010F 10 W GaN HEMT packaged device. The measurement results illustrate that drain efficiency (DE) of 67.2% to 81.7% at the saturated output power (Pout) and 50.4% to 60.1% at 6 dB output back-off (OBO) is achieved across the band 1.5 to 2.1 GHz with the saturated output power is about 43.3 to 44.6 dBm.

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“…Also, new terms have entered the communications systems which are multi-band and multi-mode, where the term "multi-band" refers to a transmitter which works on two different frequency bands simultaneously; in this case, the number of devices, size, and cost will be reduced. On the other hand, the term "multi-mode" refers to a transmitter who can support and combine different access technologies such as 2G, 3G, 4G and 5G on a single platform [8][9][10][11][12][13]. To design a dual-band power amplifier, a hybrid configuration can be used but occupies a large area.…”

Section: Introductionmentioning

confidence: 99%

Recent Developments of Dual-Band Doherty Power Amplifiers for Upcoming Mobile Communications Systems

Abdulkhaleq

Yahya

McEwan³

et al. 2019

Electronics

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Power amplifiers in modern and future communications should be able to handle different modulation standards at different frequency bands, and in addition, to be compatible with the previous generations. This paper reviews the recent design techniques that have been used to operate dual-band amplifiers and in particular the Doherty amplifiers. Special attention is focused on the design methodologies used for power splitters, phase compensation networks, impedance inverter networks and impedance transformer networks of such power amplifier. The most important materials of the dual-band Doherty amplifier are highlighted and surveyed. The main problems and challenges covering dual-band design concepts are presented and discussed. In addition, improvement techniques to enhance such operations are also exploited. The study shows that the transistor parasitic has a great impact in the design of a dual-band amplifier, and reduction of the transforming ratio of the inverter simplifies the dual-band design. The offset line can be functionally replaced by a Π-network in dual-band design rather than T-network.

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Toward a More Generalized Doherty Power Amplifier Design for Broadband Operation

Cited by 66 publications

References 41 publications

Breaking the Bandwidth Limit: A Review of Broadband Doherty Power Amplifier Design for 5G

Breaking the Bandwidth Limit: A Review of Broadband Doherty Power Amplifier Design for 5G

Highly efficient Doherty power amplifier using continuous inverseclass‐Fandclass‐Jhybrid mode

Recent Developments of Dual-Band Doherty Power Amplifiers for Upcoming Mobile Communications Systems

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