Design and optimization of high efficiency GaN HEMT class-E power amplifiers

Filipek, Tomasz A.

doi:10.1109/tencon.2015.7372951

Cited by 4 publications

(6 citation statements)

References 10 publications

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“…Based on the equation of drain efficiency, some methods improving the efficiency of PA has been proposed. [2][3][4][5][6][7][8][9][10][11][12][13] The amplifiers of these methods should be divided into two categories: one is the switching-mode PA (SMPA), and the other is the harmonic tuned PA (HT-PA). Both PAs have made considerable progress in improving drain efficiency and have also been widely used.…”

Section: The Efficiency Of the Rf Pamentioning

confidence: 99%

“…The first major solution is a class E PA with parallel capacitors. [8][9][10][11][12][13] This solution has been widely used because of its two major advantages: simple circuit design and high-efficiency operation. Its matching network is shown in Figure 2, including a parallel capacitor, a series inductor and a series filter adjustable to the fundamental frequency to provide harmonic suppression.…”

Section: Problem Of Class E Amplifiersmentioning

confidence: 99%

“…Based on the equation of drain efficiency, some methods improving the efficiency of PA has been proposed 2–13 . The amplifiers of these methods should be divided into two categories: one is the switching‐mode PA (SMPA), and the other is the harmonic tuned PA (HT‐PA).…”

Section: Introductionmentioning

confidence: 99%

“…The design purpose is to use the non‐overlapping nature of the output current waveform and voltage waveform to reduce the dissipative power

P_{diss}

in the active devices. At the same time, all harmonics are suppressed to the maximum extent to reduce the harmonic power

\sum P_{n, f} ((), n \geq 2)

, so as to achieve a high‐efficiency PA 7–13 …”

Section: Introductionmentioning

confidence: 99%

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A new harmonic tuned class E power amplifier based on waveform analysis

Yang

Luo

Xuan

et al. 2022

Circuit Theory & Apps

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In this paper, a waveform theory for harmonic tuned class E power amplifier (HT class E PA) based on waveform analysis is proposed. This paper uses the waveform theory of class F PAs and class F−1 PAs to solve the problem of harmonic tuning of traditional class E PAs. The equation of normalized current waveform of the class E PA is analyzed, set the phase difference between the current and voltage of the harmonic components to π2, and finally deduced the equation of normalized voltage waveform. This paper replaces the output impedance in the traditional class E PA design with the output impedance obtained from the waveform analysis, which makes the design of the matching network more convenient and ensures that the output current waveform and voltage waveform of the designed new HT class E PA are very close to those of the ideal class E power amplifier. The theoretical efficiency of the new HT class E PA is 89.04%. Based on this theory, a power amplifier is designed using a CREE GaN CGH40010F transistor. Test results show that: the gain can reach 10.7 dB, the output power is 40.7 dBm, PAE is 67.7%, DE is 74%.

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Section: The Efficiency Of the Rf Pamentioning

confidence: 99%

Section: Problem Of Class E Amplifiersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…The design purpose is to use the non‐overlapping nature of the output current waveform and voltage waveform to reduce the dissipative power

P_{diss}

in the active devices. At the same time, all harmonics are suppressed to the maximum extent to reduce the harmonic power

\sum P_{n, f} ((), n \geq 2)

, so as to achieve a high‐efficiency PA 7–13 …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A new harmonic tuned class E power amplifier based on waveform analysis

Yang

Luo

Xuan

et al. 2022

Circuit Theory & Apps

View full text Add to dashboard Cite

show abstract

“…Various operation classes such as Class-E [5], Class-F [6], and inverse Class-F [7] have been proposed. In particular, the Class-F operation has attracted attention due to its excellent performance [8].…”

Section: Introductionmentioning

confidence: 99%

Design of 0.8–2.7 GHz High Power Class-F Harmonic-Tuned Power Amplifier with Parasitic Compensation Circuit

Cheng

Xuan

et al. 2017

Active and Passive Electronic Components

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The design, implementation, and measurements of a high efficiency and high power wideband GaN HEMT power amplifier are presented. Package parasitic effect is reduced significantly by a novel compensation circuit design to improve the accuracy of impedance matching. An improved structure is proposed based on the traditional Class-F structure with all even harmonics and the third harmonic effectively controlled, respectively. Also the stepped-impedance matching method is applied to the third harmonic control network, which has a positive effect on the expansion bandwidth. CGH40025F power transistor is utilized to build the power amplifier working at 0.8 to 2.7 GHz, with the measured saturated output power 20-50 W, drain efficiency 52%-76%, and gain level above 10 dB. The second and the third harmonic suppression levels are maintained at −16 to −36 dBc and −16 to −33 dBc, respectively. The simulation and the measurement results of the proposed power amplifier show good consistency.

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27 MHz High Efficiency Variable Gain Amplifier for Shortwave Diathermy

Lin¹,

Peng

2019

2019 IEEE International Conference on Consumer Electronics - Taiwan (ICCE-TW)

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Design and optimization of high efficiency GaN HEMT class-E power amplifiers

Cited by 4 publications

References 10 publications

A new harmonic tuned class E power amplifier based on waveform analysis

A new harmonic tuned class E power amplifier based on waveform analysis

Design of 0.8–2.7 GHz High Power Class-F Harmonic-Tuned Power Amplifier with Parasitic Compensation Circuit

27 MHz High Efficiency Variable Gain Amplifier for Shortwave Diathermy

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