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该论文提出了一种Class-G电压模式Doherty功率放大器，结合了Class-G和Doherty技术以提高在高PAPR调制下的效率，并解决了模式转换导致的毛刺问题。实现了在6dB以上回退范围内的效率提升。
In modern communication, wideband and high-spectral-efficiency modulation results in high peak-to-average power ratio (PAPR), up to 8 to 10dB. Well-known PA-efficiency-enhancement techniques, such as Doherty and outphasing, offer reduced efficiency improvement beyond 6dB back-off, limiting the efficiency enhancement obtainable with high PAPR modulation. Recent works have shown that a combination of different techniques [1-3] can result in improved efficiency well beyond 6dB back-off. However, these combined techniques have come at a cost of glitches due to mode-transitions, when power supply voltage or load impedance undergo large variations at critical power levels. In [1,2] switching between power supply voltages causes significant glitches, which degrade the EVM and ACPR of the transmitted signal. In [1], reasonable EVM is achieved, by reducing the average output power so that power supply switching is less
Voravit Vorapipat, Cooper Levy, Peter Asbeck
University of California, San Diego, CA