§1、引言在历史上,用于信号产生、放大、调制和检测的相应器件的出现总领先于有用的系统概念的实际实现。在毫米波时这尤其明显。起初用电真空器件来设计的系统比较简单、可靠,而应用固态器件可取得更好的性能。在导弹制导系统的情况里,毫米波固态元件和设备的科技水平已达到先进的水平,故设计一个性能和价格能和常用的电子——光学、红外线和微波 §1, Introduction Historically, the emergence of corresponding devices for signal generation, amplification, modulation and detection has always preceded the practical implementation of useful system concepts. This is especially noticeable in millimeter waves. The system originally designed for electrical vacuum was relatively simple and reliable, and solid-state devices were used for better performance. In the case of missile guidance systems, millimeter-wave solid-state components and devices have reached the advanced level of science and technology, so the design of a performance and price and the commonly used electronic - optical, infrared and microwave