Linear Power Amplifiers for Sub-6GHz Mobile Applications : Progress and Trends

Giry, A.; Serhan, Ayssar; Parat, D.; Reynier, Pascal

doi:10.1109/newcas49341.2020.9159835

Cited by 5 publications

(2 citation statements)

References 19 publications

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“…To meet the development of wireless communication technology, there are higher requirements for the efficiency and transmission rate of amplifiers. Orthogonal frequency division multiplexing (OFDM) [1] high-order modulation technique uses multiple baseband signals with similar frequencies for carrier modulation, which reduces the bandwidth of the signal but produces a high peak-to-mean power ratio, which reduces the back-off efficiency of the RF amplifier. To improve the efficiency of the traditional power amplifier at the regression point, there are many solutions, such as outphasing input [2], envelope following, and Doherty technology [3], among which Doherty technology has been widely concerned by the academic community due to its simple structure, easy implementation, and excellent performance.…”

Section: Introductionmentioning

confidence: 99%

Design of High-efficiency Continuous Class F Doherty Power Amplifier

Wang,

Li,

et al. 2023

J. Phys.: Conf. Ser.

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The high efficiency of the saturation state and rollback state is an important part of the front end of modern wireless communication systems. Improving the efficiency of RF power amplifiers is of great significance for energy saving and amplifier performance. Based on the traditional Doherty power amplifier, the harmonic suppression network is introduced before the fundamental frequency matching, so that the second harmonic impedance and third harmonic impedance can achieve continuous class F impedance matching conditions, and then the saturation efficiency and regression efficiency can be improved without affecting the fundamental wave matching. The results of the simulation show that the saturation efficiency of the Doherty amplifier reaches 73.94%~77.22%. The drain efficiency of back-off 6 dB reaches 61.80%~62.92%. The average saturation drain efficiency is 75.58%, and the average back-off 6 dB drain efficiency is 62.36%.

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Section: Introductionmentioning

confidence: 99%

Design of High-efficiency Continuous Class F Doherty Power Amplifier

Wang,

Li,

et al. 2023

J. Phys.: Conf. Ser.

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“…With the innovation of wireless communication technology and the increasing requirements of users for communication quality, modern communication systems must have higher data transmission rate, larger data capacity and wider coverage. In order to meet these requirements, modern mobile communications require complex signal modulation techniques to improve the spectrum utilization effectively, such as orthogonal frequency-division multiplexing (OFDM) and quadrature amplitude modulation (QAM) [1,2,3]. However, these techniques lead to the signal having large peak-toaverage power ratios (PAPRs), which significantly reduces the efficiency of power amplifier (PA) at power back-off.…”

Section: Introductionmentioning

confidence: 99%

A concurrent 2.6/3.5GHz dual-band Doherty power amplifier with matching network based on composite right/left-handed unit cell

Luo

Xuan

Wang

et al. 2022

IEICE Electron. Express

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This paper presents a dual-band matching network based on composite right/left-handed transmission line (CRLH-TL) unit cell to optimize the impedance matching of dual-band Doherty power amplifier (DPA). The number of CRLH unit cells in the matching network can be flexibly determined by theoretical calculation to achieve impedance matching at any two frequencies. Moreover, A dualband DPA is designed and fabricated using GaN HEMT CGH40010H to verify the performance of the proposed network. The designed DPA can deliver a saturation output power over 43.3 dBm and the drain efficiency (DE) over 55.2% in the frequencies of 2.6 GHz and 3.5 GHz. Meantime, the drain efficiency at the 5dB output power back-off (OPBO) is over 44% at 2.6 GHz and 3.5 GHz.

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