一、引言现代通讯系统要求具有直流射频转换效率高、调制失真小以及可靠性高的高功率固体放大器。在末端导弹导航和拦截雷达以及测距和敌我识别等一些复杂的系统应用中都需要用大功率的部件或器件来代替电子管,使得整个系统变得小型。尤其在空间技术应用方面更是如此。单个器件因受一些因素的限制要提供足够的功率是比较困难的,这必须在器件的结构参数设计上作周密的考虑,而且制管工艺也要有所创新,所以难度较大,因而在上述 I. INTRODUCTION Modern communication systems require high-power solid state amplifiers with high DC-RF conversion efficiency, low modulation distortion and high reliability. In some complex system applications such as terminal missile navigation and interception radar and ranging and foe identification, high power components or devices are needed to replace the electron tube, making the whole system small. This is especially true in space technology applications. It is difficult for a single device to provide sufficient power due to some factors. This must be carefully considered in the design of the structural parameters of the device, and the manufacturing process needs to be innovated so that it is more difficult. Therefore, in the above