前言机械扫描的毫米波雷达不具备微波无惯性扫描天线那样的快速扫描性能。无惯性波束扫描通常是用电学方法改变天线辐射口的相位来实现的。采用分立的相移元件或通过改变频率来获得辐射元件之间所需要的相位变化。在微波范围所用的常规无惯性扫描技术并不能简单地运用于毫米波(30～300千兆赫),因为毫米波所需尺寸小,因而加工复杂、成本高。显而易见,要想在毫米波段实现电子相扫就必须要有一个新的设计方案。为了在毫米波实现相扫,LA BCOM美国陆军电子技术和设备实验室以及CECOM美国 Foreword Mechanical millimeter-wave radars do not have the fast scanning performance of microwave-inertial scanning antennas. No inertial beam scanning is usually achieved by electrically changing the phase of the antenna’s radiation port. The phase change required between the radiating elements is obtained by using discrete phase shifting elements or by changing the frequency. Conventional inertial scanning techniques used in the microwave range can not simply be applied to millimeter waves (30 to 300 GHz) because of the small size required for millimeter waves, resulting in complex processing and high costs. Obviously, in order to realize electronic phase sweep in the millimeter wave band, a new design plan must be adopted. To achieve phase sweep at millimeter waves, LA BCOM US Army Electronics Technology and Equipment Laboratory and CECOM USA