High Efficiency and High Output Power HFET GaN Doherty Power Amplifier with Linearity Region Extension for Wireless Applications

Kangarshahi, Azadeh Norouzi; Zahedi, Abdulhamid

doi:10.1007/s00034-021-01919-y

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2022

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“…It is no longer constrained by the characteristics of the PA itself, and the opposite nonlinear transformation can be fitted according to the characteristics of the PA. Fieldprogrammable Gate Array (FPGA) can be used for control and function implementation [5]- [7]. However, on the other hand, in order to improve the efficiency of RF PA, there are many new PAs such as Doherty class [8]- [9], which have higher nonlinear distortion and memory characteristics, which requires the previous DPD technology to be innovative in order to re-adapt to the new broadband amplifier. In view of the above problems, the DPD technology still needs continuous research and optimization, so that it can be combined with the new wideband PA, so that it can output the high-order modulation signal, and the signal has the characteristics of high power and good linearity.…”

Section: Iintroductionmentioning

confidence: 99%