Basic Theory and Applications for Next-Generation Power Amplifier Achieving High Power-Conversion Efficiency and Low Cost

本研究的目的是为下一代功率放大器建立一种既能提高功率转换效率又能降低成本的开关技术理论。通过在主放大器上施加具有谐波频率的注入电流，可以在开关处获得平稳的电流和电压。此外，还提出并实现了放大器的数值设计算法。通过对射频电源、DC-DC转换器、灯镇流器等具体应用的研究和开发，验证了所建立的理论和实现的设计工具的有效性。所开发的开关技术由于其功率转换效率的提高和成本的降低而非常有效，有望在电子领域得到广泛的应用。

The purpose of this research is to establish the theory of a switching technique for next-generation power amplifiers, which achieves both power-conversion efficiency enhancement and cost reduction. By applying injection current with harmonics frequency to main amplifier, it is possible to achieve smooth current and voltage at the switches. Additionally, numerical design algorithm for designing the amplifiers was proposed and implemented. Through the research and development of the concrete applications, such as RF power source, dc-dc converter, and lamp ballast, the validities of the established theory and the implemented design tool could be shown. The developed switching techniques is quite effective because of its power-conversion efficiency enhancement and cost reduction and is expected to be used as many applications in the electronics field.