Journal ArticleDOI
On the class‐F power amplifier design
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TLDR
It is shown, both analytically and using commercial nonlinear simulations, that blind application of commonly used, idealized class-F harmonic terminations can cause unexpected detrimental results.Abstract:
Power-amplifier class-F operation is investigated and revised, evidencing the fundamental importance of the harmonic-generating mechanism and the limitations imposed by the device input and output nonlinearities on the ideal class-F behavior. Closed-form expressions are derived for the major design quantities, together with the optimum fundamental and third-harmonic loading of the active device. A design procedure, making use of the derived expressions, is presented and the deviations from the ideal behavior are discussed. Sample designs, making use of a full nonlinear device model and commercial analysis software, are carried out to demonstrate the effectiveness of the analysis and the design procedure. It is shown, both analytically and using commercial nonlinear simulations, that blind application of commonly used, idealized class-F harmonic terminations can cause unexpected detrimental results. ©1999 John Wiley & Sons, Inc. Int J RF and Microwave CAE 9: 129–149, 1999read more
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Book
High Efficiency RF and Microwave Solid State Power Amplifiers
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Journal ArticleDOI
Maximum efficiency and output of class-F power amplifiers
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High-power time-domain measurement system with active harmonic load-pull for high-efficiency base-station amplifier design
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References
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Journal ArticleDOI
Class-F power amplifiers with maximally flat waveforms
TL;DR: In this paper, the basic relationship among the Fourier coefficients of the waveforms and the performance of the amplifier was derived for maximally flat waveforms, and the Amplifier performance was tabulated as a function of which harmonics are included in the voltage and current waveforms.
Journal ArticleDOI
A theoretical analysis and experimental confirmation of the optimally loaded and overdriven RF power amplifier
TL;DR: In this article, an analysis of appropriately selected collector voltage and current waveforms is presented to determine the load impedance at the fundamental and harmonically related frequencies; these conditions define the ClassB "optimum efficiency" case with 100 percent collector efficiency and 1.27 times the conventional Class B value of output power.
Journal ArticleDOI
High-efficient class F GaAs FET amplifiers operating with very low bias voltages for use in mobile telephones at 1.75 GHz
TL;DR: In this paper, a high efficiency class F GaAs power FET amplifiers working with a very low drain bias voltage of 3 V, for use in portable telephones, are reported.
Journal ArticleDOI
Basic limitations on waveforms achievable in single-ended switching-mode tuned (Class E) power amplifiers
TL;DR: This paper shows that no configuration of linear circuit elements can provide zero voltage and zero current at both transitions of the switch, if nonzero output power is to be delivered to a load and the minimum jump magnitude is derived.
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