高效率E类射频功率振荡器的设计

摘要

A novel technique for the design of high efficiency and high power Class-E RF oscillators is presented.Through equivalent transformation,Class-E RF power oscillator is eventually converted to the same structure as Class-E amplifier.Hence,it is possible to obtain output power and collector efficiency as high as Class-E power amplifier in the corresponding condition.A design example of ClassE RF oscillator is given using LDMOS ARF461.simulation results by ADS show that,the circuit has a excellent performance with an output power of 46W and an efficiency of 92％ at the work frequency 13.56 MHz.%主要介绍了高效率E类射频功率振荡器的原理和设计方法,通过电路等效变换,E类射频功率振荡器最终转换成与E类放大器相同的结构,MOS管工作在软开关状态,漏极高电压、大电流不会同时交叠,大大降低了功率损耗,在同等工作条件下,能够获得与E类放大器相似的高效率.文中以ARF461型LDMOS做为功率器件,结合E类射频振荡器在等离子体源中的应用,给出了的设计实例.ADS仿真结果表明,在13.56MHz的工作频率下,振荡器输出功率46W,效率为92％,符合设计预期.