1.6‐2.6 GHz continuous Class‐F power amplifier with gain and power‐added efficiency flatness enhancement by negative feedback structure

Qi, Chongchong; Luo, Yonglun; Feng, Xuxu; Dong, Chaoran

doi:10.1002/mop.31804

Cited by 7 publications

(7 citation statements)

References 23 publications

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“…Switching‐mode PAs such as Class‐E and Class‐F 2–4 can theoretically reach 100% efficiency. However, the efficiency of these devices decreases as their bandwidth expands.…”

Section: Introductionmentioning

confidence: 99%

Wideband Class‐F power amplifier design based on harmonic control analysis and bandwidth expansion structure

Zhao

Zhang

2022

Micro & Optical Tech Letters

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This paper proposes a novel Class‐F broadband power amplifier design method. A Class‐F power amplifier for 1.3–2.5 GHz is fabricated by step‐matching, combining a harmonic control structure and a parasitic compensation circuit. A bandwidth expansion structure is established based on microstrip lines and capacitor. The proposed structure resolves the low efficiency caused by the coincidence of the fundamental frequency band and second harmonic frequency band, which allows the power amplifier to function properly from 1.1 to 2.5 GHz. A high‐efficiency broadband power amplifier is tested to find that the saturated output power with the proposed device is between 40.1 and 41.7 dBm, the gain is from 9.3 to 14.4 dB, and the drain efficiency is 60.8%–84.2% at 1.1–2.5 GHz frequency.

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“…Switching‐mode PAs such as Class‐E and Class‐F 2–4 can theoretically reach 100% efficiency. However, the efficiency of these devices decreases as their bandwidth expands.…”

Section: Introductionmentioning

confidence: 99%

Wideband Class‐F power amplifier design based on harmonic control analysis and bandwidth expansion structure

Zhao

Zhang

2022

Micro & Optical Tech Letters

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“…A common approach to address this problem is to design a broadband PA that covers all the operation bands [7][8][9][10][11]. The fundamental impedance matching with 50-Ohm load is the first step to overcome.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, the second and the third harmonic load terminations also need to be considered to improve the efficiency by various approaches. However, most of the designs failed to solve the challenge and to realize the optimization in operating multi-bands, e.g., the methods proposed in [11][12][13][14] are focusing on the broadband performance, rather than the bands of interest in our application [15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

A Class-F Based Power Amplifier with Optimized Efficiency in Triple-Band

Yang

Zhang

et al. 2022

Electronics

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A Class-F mode-based power amplifier (PA) with optimized efficiency in triple-band was designed using a simple and systematic approach. By considering the second and third harmonic terminations of the PA, the relationship between the output impedance design space and the drain efficiency (DE) is extracted by large-signal model simulation. Then, a low-pass matching topology is utilized for the triple-band efficiency optimization. The method is justified by both simulation and measurement of a triple-band PA to integrate three functions into one hardware, i.e., 1518–1525 MHz for mobile communication, 2.1 GHz for telemetry and control, and 2.492 GHz for navigation signal transport. The proposed PA achieves a measured result of high DE (63% at 1.52 GHz, 71% at 2.1 GHz, 59% at 2.492 GHz) in the three bands with an output power of at least 40 dBm.

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“…The overall efficiency of wireless communication networks is predominantly determined by the power amplifier (PA) stage. The Class-F PA, which defines a short load termination at even-order harmonics (current peaking) and an open load termination at odd-order harmonics (voltage peaking), has become a representative of the high efficiency amplifiers [1][2][3][4][5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Substrate integrated waveguide based class‐F power amplifier

Yang

et al. 2021

Electronics Letters

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This work outlines the design, implementation, and experimental results of a Class-F power amplifier (PA) with a novel output matching topology by utilizing substrate integrated waveguide (SIW). The design methodology is first proposed with one highly integrated SIW matching structure. The impedances at fundamental, second harmonic and third harmonic frequencies are analysed to explain good impedance matching for the PA as well as the isolation mechanism of the direct current (DC) and radio frequency (RF). For demonstration, an S-band 10-W Class-F PA is fabricated and tested. The simulation and measurement results agree very well with each other, which verifies the proposed technology of SIW output matching. To the authors' knowledge, this is the first time to use a highly integrated SIW matching in Class-F PA, which simplifies the output matching for third-order harmonics and DC/RF isolation structures.

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1.6‐2.6 GHz continuous Class‐F power amplifier with gain and power‐added efficiency flatness enhancement by negative feedback structure

Cited by 7 publications

References 23 publications

Wideband Class‐F power amplifier design based on harmonic control analysis and bandwidth expansion structure

Wideband Class‐F power amplifier design based on harmonic control analysis and bandwidth expansion structure

A Class-F Based Power Amplifier with Optimized Efficiency in Triple-Band

Substrate integrated waveguide based class‐F power amplifier

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