论文部分内容阅读
双模喇叭通常被用作抛物面反射器天线的馈源,它可以产生近似高斯波束的辐射方向图。为确定天线的远场,通常对反射器表面的物理光学电流进行积分,或者用光学射线方法对在天线口径上测定的场进行积分。若从馈源喇叭,经过副反射器,可以直接按高斯波束处理,就可以避免上述繁琐的积分。从馈电喇叭,经过副反射器,到主反射器,然后再到远区,也如此处理。可用复源点方法或原则上用短暂波方法来实现这种场的处理。前者利用复坐标空间,后者则在整个实坐标空间中进行分析。对于馈源位于焦点的偏置抛物面天线,本文用这两种方法均作了研究,并对各自的优缺点加以评述。将这种方法与用半探试法所得的结果和实验数据进行的比较,显示出复射线方法的精度和多用性。
Dual-mode loudspeakers are commonly used as feeds to parabolic reflector antennas, which produce radiation patterns that approximate Gaussian beams. In order to determine the far field of the antenna, the physical optical current of the reflector surface is usually integrated or the field measured at the antenna aperture is integrated by the optical ray method. If from the feed horn, through the sub-reflector, you can press the Gaussian beam processing, you can avoid the tedious integral. From the feed horn, through the subreflector, to the main reflector, and then to the far zone, the same goes for that. The complex source point method or principle can be used to achieve short-wave method of this field processing. The former uses complex coordinate space, the latter in the real coordinate space for analysis. For the parabolic antenna with focus on the feed, both methods are studied in this paper, and their advantages and disadvantages are reviewed. The comparison of this method with the results obtained with the semi-probe method and the experimental data shows the accuracy and versatility of the complex ray method.