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现代雷达一般都工作在1千兆赫到35千兆赫之间,共相应波长为米波和厘米波段。而毫米波雷达使用的则是新开发的、波长更短的毫米波段,共频谱在30千兆赫到300千兆赫之间。最近又向更高的频率扩展,达到1000千兆赫。100千兆赫到1000千兆赫频率(相应波长为3到0.3毫米)区域叫“近毫米波”区。
Modern radars generally work between 1 gigahertz and 35 gigahertz, with a total of corresponding wavelengths in millimeter and centimeter bands. The millimeter wave radar uses a newly developed, shorter wavelength millimeter waveband with a total spectrum between 30 and 300 GHz. It recently expanded to higher frequencies, reaching 1,000 gigahertz. The area from 100 gigahertz to 1000 gigahertz (corresponding to a wavelength of 3 to 0.3 mm) is called the “near millimeter wave” area.