This article presents a novel resonant-linear hybrid converter for a radio frequency (RF) power amplifier (PA). The proposed topology consists of a push-pull resonant inverter and a voltage-controlled linear amplifier at the output port. The push-pull resonant inverter consists of two single-ended Class Φ2 inverters, and the voltage-controlled linear amplifier controls the output voltage to track the phase of the reference voltage for phase control of the output. Thus, the output voltage can be well controlled as a pure sinusoidal curve. A driving circuit is presented in this article to make the output current of the push-pull resonant inverter in phase with the linear amplifier. Moreover, a quasi-trapezoidal voltage output driving circuit is designed to decrease the drive losses, and a multiresonant network with a 180° phase shift is also presented in this article to produce a sinusoidal driving voltage to avoid the shoot-through problem. This structure serves the 100 MHz RF band, In future, this hybrid structure could be applied in the transmitter of microwave power transmission (MPT) system. Finally, a 100 MHz/20 W prototype was built to verify the theoretical analysis.

中文翻译：

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射频频段功率放大器谐振线性混合结构


本文介绍了一种用于射频 (RF) 功率放大器 (PA) 的新型谐振线性混合转换器。所提出的拓扑由推挽式谐振逆变器和输出端口处的压控线性放大器组成。推挽谐振逆变器由两个单端Φ2类逆变器组成，压控线性放大器控制输出电压跟踪参考电压的相位，实现输出的相位控制。因此，输出电压可以很好地控制为纯正弦曲线。本文提出了一种驱动电路，使推挽谐振逆变器的输出电流与线性放大器同相。此外，设计了准梯形电压输出驱动电路以降低驱动损耗，并且本文还提出了具有180°相移的多谐振网络来产生正弦驱动电压以避免击穿问题。该结构服务于100 MHz RF频段，未来该混合结构可应用于微波功率传输（MPT）系统的发射机中。最后搭建了100 MHz/20 W样机来验证理论分析。