Adaptive matching for efficiency enhancement of switching mode and nonlinear microwave power amplifiers

Din, Mohamed Gamal El; Geck, Bernd; Eul, H.

doi:10.1109/rws.2010.5434258

Cited by 1 publication

(3 citation statements)

References 4 publications

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“…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 first major solution is a class E PA with parallel capacitors 8–13 . This solution has been widely used because of its two major advantages: simple circuit design and high‐efficiency operation.…”

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: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%