A broadband class‐F/J hybrid power amplifier

Li, Guohua; Guo, Cantianci; Cheng, Zhiqun; Zhang, Zhiwei; Guo-xiang, Zhou; Zhao, Wei

doi:10.1002/mop.32358

Cited by 8 publications

(7 citation statements)

References 30 publications

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“…In the cited references, trade-offs are observed between efficiency and bandwidth when combining power amplifier modes. However, most designs of output matching circuits are limited by bandwidth and exhibit low average efficiency across the frequency band due to the quarter-wavelength approach [10][11][12]. To address this, we have developed a multimode hybrid class bandwidth amplifier utilizing a filter principle.…”

Section: Introductionmentioning

confidence: 99%

Design of an Octave-multimode Hybrid Broadband High-efficiency Power Amplifier

Zhang,

Zhao,

et al. 2024

PIER Letters

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This paper discusses the challenges faced by existing power amplifier configurations in meeting the bandwidth requirements of modern communication technology while maintaining high efficiency due to the overlap of fundamental and harmonic frequencies. To address this issue, the paper proposes a matching method based on mode combination theory that utilizes the overlap of harmonic and fundamental impedance to simplify the design of broadband amplifiers. In this paper, a Chebyshev low-pass filter is used to control the higher harmonics instead of the conventional quarter-wavelength harmonic control network with a combination of harmonic impedances. The proposed method combines three modes of Resistive-Reactive class F [−1], class J, and class F power amplifiers, which can achieve high efficiency and octave frequency at the same time. The paper verifies the proposed method by designing and fabricating a multimultiplier power amplifier with a drain efficiency of 61.8-73.9%, an operating bandwidth of 1.4-2.9 GHz, and a saturation output of 41.1-42.3 dBm. The amplifier also has a gain greater than 11.1-12.3 dBm, and at an output power of 36 dBm, the ACPR value is −32 to −33.1 dBc across the band.

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Section: Introductionmentioning

confidence: 99%

Design of an Octave-multimode Hybrid Broadband High-efficiency Power Amplifier

Zhang,

Zhao,

et al. 2024

PIER Letters

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“…After several decades of research, there are many forms of PAs [1]. Among them, the switching-mode PAs, such as class-E PAs [2,3,4,5], class-F PAs [6,7,8,9], class-J PAs [10,11,12,13] and hybrid class PAs [14,15,16,17,31], can realize high-efficiency and high-power. Besides, impedance transformer is another effective method for PA design [18,19,20].…”

Section: Introductionmentioning

confidence: 99%

A power amplifier by using asymmetrical branch-line coupler

Peng²,

Wang

et al. 2022

IEICE Electron. Express

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In this paper, a novel power amplifier (PA) is proposed. An asymmetrical branch-line coupler is exploited as the output matching circuits of the proposed PA. Meanwhile, by setting the impedance conditions with trade-off in desired pass-band appropriately, impedance matching and output power combination can be realized in a single circuit. A brief analysis of the asymmetrical branch-line coupler is presented. Compared with the traditional high-power PAs design method, this design method can meet the requirement of the miniaturization. To prove the validity of the proposed method, a PA works at 2 GHz is designed, fabricated and measured by using a 10-W gallium nitride (GaN) transistor (CGH40010F). The measured results show that a saturated output power of 42.8-45.2 dBm with a poweradded efficiency of 52.0-62.6% is achieved and a saturated power gain between 7.9 and 10.1dB.

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“…With the rapid development of 5G communication systems, broadband high‐efficiency radio frequency (RF) power amplifier (PA) is playing a vital role in the front‐end of the transmitter 1 . A broadband and high‐efficiency PA is highly desired, 2 when various switch‐mode PAs with broadband and high‐efficiency are taken more into consideration, for example, Class E 3–5 PA and Class F 6–15 PA. Class‐E PA mode has been extensively utilized in designing and implementing broadband PAs 16–18 due to its fairly simple circuitry and high‐efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…With the rapid development of 5G communication systems, broadband high-efficiency radio frequency (RF) power amplifier (PA) is playing a vital role in the front-end of the transmitter. 1 A broadband and high-efficiency PA is highly desired, 2 when various switch-mode PAs with broadband and high-efficiency are taken more into consideration, for example, Class E [3][4][5] PA and Class F [6][7][8][9][10][11][12][13][14][15] PA. Class-E PA mode has been extensively utilized in designing and implementing broadband PAs [16][17][18] due to its fairly simple circuitry and high-efficiency. However, such a switch-mode operation fails at high frequencies (see Class-E theoretical limitation 19,20 ), as its parallel capacitor cannot be fully charged or discharged to support the ideal drain waveforms, leading to an efficiency degradation.…”

Section: Introductionmentioning

confidence: 99%