Generalized Continuous Class-F Harmonic Tuned Power Amplifiers

Sharma, Tushar; Darraji, Ramzi; Ghannouchi, Fadhel M.; Dawar, Neha

doi:10.1109/lmwc.2016.2524989

Cited by 86 publications

(46 citation statements)

References 5 publications

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“…The main difference between the class F and class B amplifier is the utilization of the third harmonic on the output voltage, where class F amplifier efficiency will be improved compared with class B efficiency. By adding the third harmonic component to the voltage output, the voltage shape will look like a square waveform, whereas the current waveform is a truncated sinusoid [11][12][13][14]. In this case, the overlapping between the output current and voltage will be reduced.…”

Section: Theory Of Class F Amplifiermentioning

confidence: 99%

Three-Way Doherty Power Amplifier Using Class-F Amplifier for More Efficient Mobile Communications

Abdulkhaleq¹,

Yahya²,

Sajedin³

et al. 2020

Proceedings of the Proceedings of the 1st International Multi-Disciplinary Conference Theme: Sustainable Development and Smart

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An efficient three-way Doherty amplifier is designed and simulated using Cadence Microwave Office software. 6W, 25W and 45W GaN HEMT transistors are used to design three-way Doherty amplifier at 3.4-3.8 GHz band to achieve a 76W peak power. Each amplifier was designed to work as a class F amplifier to improve the efficiency of the designed amplifier. In addition, A new configuration of impedance modulation is used, where a 12.5 dB gain was obtained over the band, in addition, a 13 dB back-off efficiency was achieved with 50-60% drain efficiency. Changing the location of the peaking amplifier or changing the operation sequence of the peaking amplifier can achieve good efficiency at the back-off region. There was an efficiency improvement of 10% at the back off by utilizing a class F amplifier comparing with the classical Doherty design.

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Section: Theory Of Class F Amplifiermentioning

confidence: 99%

Three-Way Doherty Power Amplifier Using Class-F Amplifier for More Efficient Mobile Communications

Abdulkhaleq¹,

Yahya²,

Sajedin³

et al. 2020

Proceedings of the Proceedings of the 1st International Multi-Disciplinary Conference Theme: Sustainable Development and Smart

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“…end if (16) end for // end -loop (17) max ← ; (18) if max = 0 do (19) print "no solution found -increase the value of 0, max and try again"…”

Section: Mathematical Problems In Engineeringmentioning

confidence: 99%

“…Furthermore, parameter is determined from the condition that the third harmonic is missing in current waveform. The same model of current waveform is also used in [19] in the context of continuous class-F PA.…”

Section: Introductionmentioning

confidence: 99%

On Optimal Truncated Biharmonic Current Waveforms for Class-F and Inverse Class-F Power Amplifiers

Juhas

Dautovic

Novak

2017

Mathematical Problems in Engineering

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In this paper, two-parameter families of periodic current waveforms for class-F and inverse class-F power amplifiers (PAs) are considered. These waveforms are obtained by truncating cosine waveforms composed of dc component and fundamental and either second(k=2)or third(k=3)harmonic. In each period, waveforms are truncated to become zero outside of a prescribed interval (so-called conduction angle). The considered families of waveforms include both discontinuous and continuous waveforms. Fourier series expansion of truncated waveform contains an infinite number of harmonics, although a number of harmonics may be missing. Taking into account common assumptions that for class-F PA the third(n=3)harmonic is missing in current waveform and for inverse class-F PA the second(n=2)harmonic is missing in current waveform, we consider the following four cases: (i)n=k=3,(ii)n=3,k=2,(iii)n=k=2,and (iv)n=2,k=3.We show that, in each of these cases, current waveform enabling maximal efficiency (optimal waveform) of class-F and inverse class-F PA is continuous for all conduction angles of practical interest. Furthermore, we provide closed-form expressions for parameters of optimal current waveforms and maximal efficiency of class-F (inverse class-F) PA in terms of conduction angle only. Two case studies of practical interest for PA design, involving suboptimal current waveforms, along with the results of nonlinear simulation of inverse class-F PA, are also presented.

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“…Class-F amplifier is the harmonic controlled type of amplifiers [5][6][7]. In another word, the switch voltage and current are formed using different harmonics in Class-F amplifier.…”

Section: Introductionmentioning

confidence: 99%

Using an ANN Approach to Estimate Output Power and PAE of A Modified Class-F Power Amplifier

Jamshidi

Roshani

Talla

et al. 2020

2020 International Conference on Applied Electronics (AE)

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In this paper, an efficient Class-F power amplifier (PA) is designed, simulated and modeled. This type of amplifier has nonlinear behaviors and uses tuning and controlling harmonics as the most important mechanism to increase efficiency. Feedforward artificial neural network (ANN) model is proposed to predict and estimate the nonlinear output of the power amplifier. The designed amplifier operates at 900 MHz, with 18 dB gain and 70 %Power-Added Efficiency (PAE). In the design process, the artificial neural network model is used to predict PAE and output power parameters as a function of input power, drain voltage and gate voltage of the applied transistor (DC Biasing voltages). The obtained mean relative errors (MREs) are less than 0.03% and 0.09% for the predicted output power and PAE parameters.

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Generalized Continuous Class-F Harmonic Tuned Power Amplifiers

Cited by 86 publications

References 5 publications

Three-Way Doherty Power Amplifier Using Class-F Amplifier for More Efficient Mobile Communications

Three-Way Doherty Power Amplifier Using Class-F Amplifier for More Efficient Mobile Communications

On Optimal Truncated Biharmonic Current Waveforms for Class-F and Inverse Class-F Power Amplifiers

Using an ANN Approach to Estimate Output Power and PAE of A Modified Class-F Power Amplifier

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