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(6)抛物面天线常用馈源形式有:角锥喇叭、圆锥喇叭、开口波导和波纹喇叭等。前馈馈源中使用最多的是波纹槽馈源;还有一种叫带扼流槽的同轴波导馈源。后馈馈源喇叭常用的是介质加载型喇叭,它是在普通圆锥喇叭里面加上一段聚四氟乙烯衬套构成的。偏馈天线要选用偏馈馈源,偏馈馈源盘的波纹呈漏斗状,而正馈馈源的波纹盘为水平状。四、极化器对极化波的接收与极化调整1.极化波电波在空间传播时,其电场矢量的瞬时取向称为
(6) Parabolic antenna commonly used form of feed: pyramid horn, cone horn, waveguide and open the corrugated horn and so on. One of the most widely used feedforward feeds is the corrugated trough feed; another is a co-axial feed with a choke slot. Feed-back feed horn is commonly used medium-load speaker, which is in the ordinary cone horn with a section of PTFE bushings. Partial feed antenna to choose to feed the partial feed, feed the partial feed corrugated funnel-shaped, while the feed-fed corrugated plate is horizontal. Fourth, the polarizer polarization of the reception and polarization adjustment 1. When the polarization wave propagation in space, the instantaneous orientation of the electric field vector is called