一、毫米波频段的划分在对毫米波雷达应用论述之前,弄明白毫米波的定义是极其重要的。显然,毫米波波长范围可为1.0到10.0毫米(频率分别从300GHz 到30GHz)。由于存在着众所周知的氧吸收谱线和水吸收谱线,除了一些值得注意的例外情况外,1到10毫米的使用范围集中在35、70、95、140、220GHz 频率的大气传播窗内。美国电气和电子工程协会在关于雷达频段划分的新规定中规定:Ku 频段为12～18GHz;K 波段为18～27GHz;Ka 波段为27 I. The Division of the Millimeter-Wave Band Prior to applying the millimeter-wave radar, it became extremely important to understand the definition of millimeter-wave. Obviously, millimeter wavelength range can be 1.0 to 10.0 mm (frequency from 300GHz to 30GHz). Due to the well-known oxygen and water absorption lines, with some notable exceptions, the use of 1 to 10 millimeters is concentrated in the atmospheric transmission window at 35, 70, 95, 140, 220 GHz. American Institute of Electrical and Electronic Engineering in the new provisions on the division of the radar frequency provides: Ku band 12 ~ 18GHz; K band 18 ~ 27GHz; Ka band 27