日益扩大的威胁力量促使地面防空系统的设计人员不断探索探测空中目标的新方法,同时,技术的发展使他们又对一些过时的探测方法重新产生了兴趣。目前,可供选择的探测器的频率范围粗略地可分为米波、厘米波、毫米波以及红外、声波等。米波雷达一些国家又重新从事对波长为100～10m,3～30MHz的米波雷达应用的研究.30年代 The growing threat forces have prompted designers of ground-based air defense systems to continually explore new ways of detecting air targets while at the same time developing new technologies have rekindled their interest in some outdated detection methods. At present, the frequency range of the detectors to choose from is roughly divided into meter waves, centimeter waves, millimeter waves and infrared waves and sound waves. Some countries in the Mi-Po radar have been re-engaged in the study of the application of Mi-wave radar with wavelengths of 100 to 10 m and 3 to 30 MHz.