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一、多卜勒导航雷达天线的选择多卜勒雷达所采用的天线有透镜天线、抛物面天线和波导裂缝阵天线等,其中波导裂缝阵天线具有体积小、重量轻、结构紧凑等优点。这种天线的尺度与波导的尺度相同特别适合装在飞机上。它的口径分布容易控制,没有馈源的能量泄漏,没有馈源及支撑结构造成的遮挡效应。当采用矩形波导宽面上纵向并联裂缝时,交叉极化能量损失极小,特别当采用驻波阵时,其口径效率很高,可达0.6～0.8。改变裂缝的分布,严格控制制造公差,可得至Ⅱ最佳口径场分布,即高增益、低旁瓣。因此波导裂缝天线的应用日益广泛。多卜勒雷达天线射束数和配置方式的选择与测量
First, Doppler navigation radar antenna selection Doppler radar antenna used in the lens antenna, parabolic antenna and waveguide slot array antenna, etc., which waveguide slot antenna array has the advantages of small size, light weight, compact structure. This antenna has the same dimensions as the waveguide and is particularly suitable for mounting on an aircraft. Its caliber distribution is easy to control, there is no leakage of energy from the feed, no obstruction by feed and support structure. The cross-polarization energy loss is very small when the longitudinal parallel cracks on the rectangular waveguide are adopted. Especially when the standing wave array is adopted, the aperture efficiency is very high, reaching 0.6-0.8. Change the distribution of cracks, strict control of manufacturing tolerance, available to the best caliber Ⅱ field distribution, that is, high gain, low sidelobe. Therefore, waveguide crack antenna is widely used. Selection and Measurement of Doppler Radar Antenna Number and Configuration