一、问题的重要性: 在辐射系统和恒定源为一体时,需要了解辐射点、即飞行器相位中心的近似定位。比方说,当使用辐射系统时,例如一个透镜或一个反射镜的初级源时,很明显必须使其相位中心与光源相互重合。过去,由于无线电技术水平的限制,人们对天线相位中心的认识还很肤浅。现在随着对愈益精确的定位或引导的掌握,进而打破了由于对相位中心认识不足所造 First, the importance of the problem: In the radiation system and constant source as a whole, the need to understand the radiation point, that is, the approximate location of the aircraft phase center. For example, when using a radiation system, such as the primary source of a lens or a mirror, it is clear that the center of the phase must be coincident with the light source. In the past, due to the technical limitations of radio, people knew very little about the antenna phase center. Now with the grasp of more and more accurate positioning or guidance, thus breaking due to lack of understanding of the phase center