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一、毫米波系统的应用人们已经将毫米波技术广泛应用于各种电子防御系统。由于在毫米波波长上传播所固有的局限性,大多数实用系统主要用于近程通信以及在低大气层中1～5公里路径长度的范围内进行检测。然而人们正在大力研究将毫米波用于卫星系统的上行和下行传输线路。在卫星应用方面,以比较陡斜的角度通过大气层测得的衰减所受的限制比在点对点通信链路或空对地导弹通常采用接近地平线传播的情况下遇到的衰减所受的限制要少得多。图1概括了主要的应用情况以及每种应用优先采用的波段。在要进行倍频选择的许多情
First, the application of millimeter-wave system Millimeter-wave technology has been widely used in a variety of electronic defense systems. Due to the inherent limitations of propagation at millimeter-wave wavelengths, most utility systems are primarily used for short-range communications and within the 1 to 5 km path length in the lower atmosphere. However, people are studying the use of millimeter waves for the uplink and downlink transmission lines of satellite systems. In satellite applications, the attenuation of atmospheric attenuation measured at steeper angles is less restrictive than the attenuation experienced in point-to-point communications links or air-to-surface missiles that generally approach horizon-like propagation Much more. Figure 1 summarizes the main applications and the preferred band for each application. Many situations in which to choose multiplier