Sequential Load-Pull Technique for Multioctave Design of RF Power Amplifiers

Taghavi, Hamidreza; Akbarpour, Mohammadhassan; Ghannouchi, Fadhel M.

doi:10.1109/tcsii.2016.2534739

Cited by 19 publications

(8 citation statements)

References 11 publications

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“…In a wideband RF PA design, the second harmonic frequency influence should be taken into consideration especially in the multi octave PA design in which the harmonic frequencies are in band. Extra design effort is needed to either follow waveform engineering approach or Load-Pull approach [1]. In this paper, the Load-Pull approach is presented.…”

Section: Design Methodologymentioning

confidence: 99%

“…In this paper, the Load-Pull approach is presented. Load-Pull simulations for different frequencies within the bandwidth are carried out to obtain optimum load impedence trajectories at the output of the active device [1]. Therefore, the first step to design the RF PA is to find the optimum source and load impedence that will maximize the performance of the PA in terms of the PAE and the output power delivered as mention in the previous section [3].…”

Section: Design Methodologymentioning

confidence: 99%

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0.5 GHz-1.5 GHz Bandwidth 10W GaN HEMT RF Power Amplifier Design

Ilamaran

Yusoff

Sampe³

2018

IJECE

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With the current development in wireless communication technology, the need for a wide bandwith in RF power amplifier (RF PA) is an essential. In this paper, the design and simulation of 10W GaN HEMT wideband RF PA will be presented. The Source-Pull and Load-Pull technique was used to design the input and output matching network of the RF PA. From the simulation, the RF PA achieved a flat gain between 15dB to 17dB from 0.5GHz to 1.5GHz. At 1.5GHz, the drain efficiency is simulated to achieve 36% at the output power of 40 dBm while the power added efficiency (PAE) was found to be 28.2%.

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Section: Design Methodologymentioning

confidence: 99%

Section: Design Methodologymentioning

confidence: 99%

0.5 GHz-1.5 GHz Bandwidth 10W GaN HEMT RF Power Amplifier Design

Ilamaran

Yusoff

Sampe³

2018

IJECE

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“…However, time-consuming load-pull measurements limit the possibility of traversing the multi-harmonic Smith chart to find all the HEPA impedances. In order to solve this problem, a sequential loadpull technique was proposed in [15] to reorganize a broadband impedance determination flow and to avoid harmonic impedances conflict.…”

Section: Introductionmentioning

confidence: 99%

Design of Broadband High-Efficiency Power Amplifier Through Interpolations on Continuous Operation-Modes

You

Peng

et al. 2019

IEEE Access

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Besides various kinds of continuous-mode high-efficiency power amplifiers (HEPAs), there do exist many other undefined HEPA operations. In place of introducing variables into waveform equations, a numerical mode-interpolation method based on the nonlinear drain current calculations is used in this paper. The combinations of fundamental drain voltage's amplitude and phase boundaries from general continuous modes are used to form the interpolation grids. The interpolated high-efficiency operations determined by the practical transistor's characteristics are collected as perturbation seeds in a solution expansion procedure. Hence, the expanded optimized load impedances are defined as a candidate design space of a mixedmode HEPA. A broadband HEPA design example from 0.5 to 4 GHz is given based on these interpolated impedances. Finally, this PA is fabricated and measured to offer 39.0-to 42.3-dBm power and 58.2% to 69.3% drain efficiency from 0.45 to 4 GHz. INDEX TERMS Broadband power amplifiers, high-efficiency power amplifiers, operation-mode interpolations, optimized impedance calculations, and waveform engineering.

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“…Waveform measurement system can be used to inspect PA's operations from time‐domain waveforms . Efficient design and excellent results were achieved through these techniques …”

Section: Introductionmentioning

confidence: 99%

“…21 Efficient design and excellent results were achieved through these techniques. 22,23 In this article, an extended analysis method to determine PA waveforms and performance is realized with a transistor's nonlinear I-V curves. It is organized as follows: in Section 2, the general waveform determination process is introduced.…”

Section: Introductionmentioning

confidence: 99%

Extended theoretical analysis method on the performance of high-efficiency power amplifiers by solving nonlinear waveform determination process

You

Huang

2016

Int J RF Microw Comput Aided Eng

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Classical analysis of high‐efficiency power amplifiers (PA) is usually based on ideal voltage and current waveforms limited to optimal states. A transistor's nonlinear I‐V curves are not usually taken into consideration because of their complexity. With a computer‐aided calculation tool developed herein, a direct waveform determination method involving nonlinear I‐V curves is realized. Using this approach and simplified I‐V curves, a PA's extended theoretical performance from the back‐off region to saturation can be investigated. If using practical dc I‐V curves, this method can also give good performance analysis results even at microwave frequency. Numerical examples of different PA settings are given to verify this method. Nonlinear calculations, harmonic balance simulations, and measurements of a class‐E PA operating at 3 GHz are shown with consistent results to prove this waveform determination method.

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Sequential Load-Pull Technique for Multioctave Design of RF Power Amplifiers

Cited by 19 publications

References 11 publications

0.5 GHz-1.5 GHz Bandwidth 10W GaN HEMT RF Power Amplifier Design

0.5 GHz-1.5 GHz Bandwidth 10W GaN HEMT RF Power Amplifier Design

Design of Broadband High-Efficiency Power Amplifier Through Interpolations on Continuous Operation-Modes

Extended theoretical analysis method on the performance of high-efficiency power amplifiers by solving nonlinear waveform determination process

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