Based on the simulation results , a cobra antenna constituted by four reflectors is designed , the antenna produces a radiation pattern with a boresight peak , and the antenna gain reachs to 28 . 4db 通过数值仿真,设计了一种由四块反射面组成的cobra天线,天线在轴向上辐射场最强,增益达到28 . 4db 。
In the absence of sideway spin , the ball when hitting a hard surface should follow a path similar to that of light ray , i . e . , the angle of reflection equals the angle of incidence 利用坚硬的反射面，并在没有侧旋的影响下，球的反射路线与光的反射路线应该是一致的，即球的入射角与反射角相同。
Comparing the shape design method that is in common use currently , deducing the physical and geometrical optics theory , this article advanced a direct - shape method for the reflector 本文综合比较了目前常用的赋形设计方法，并通过物理光学、几何光学理论公式的推导，提出了一种反射面直接赋形的方法。
It associates the deformation of the reflector with the shape requirement of far - field sampling points . and the reflector surface of shaped antenna can be obtained directly after several optimization courses 它将反射面的变形同服务区内采样点的电磁赋形要求关联起来，通过优化计算直接得到赋形天线面。
So their method can be used not only for phased array radar but also for reflector antenna radar . their research shows the ? a - stap can provide good clutter - suppression performance and has many advantages 所以基于和、差波束的空时二维处理方法不仅可以用于相控阵天线雷达，也可以用于一般的反射面天线雷达。
Common reflection surface ( crs ) stack , which depends on three attributes of the seismic wave - field , is a seismic imaging method independent of the macro - model 摘要共反射面叠加方法运用3个地震波场参数来描述地下反射面元时距关系，不对地下反射界面形状做任何假设，并且是一种不依赖于宏观速度模型的反射波成像方法。
The surface of glass is very smooth , and a coating of aluminium renders it an ideal material for making mirrors . in reality , objects sufficiently smooth behave like mirrors to a certain degree 每一件物件的反射能力，由物件反射面的物质和平滑程度所决定。玻璃的平滑度高，加上铝质的反射面，成为最佳的造镜材料。
Their interest in ? a - stap stemmed from the fact that antenna engineers have excelled in the design of high performance sum and difference beam whether for phased array or for reflector antenna 人们对这种特殊的空时二维处理感兴趣的原因是无论相控阵天线系统还是反射面天线系统，天线工程师都可以设计出性能很好的和、差波束。
" the project aims to build a fixed spherical reflective antenna of 500 metres aperture at a bowl - shaped valley of some 500 metres wide in a mountainous area in guizhou and this reflective antenna will be named as " soft antenna " 。这研究项目计划在贵州山区中的一个开口500多米的碗状山谷中，依附地形建造一口径为500米的球面反射面固定天线，名为柔性的天线。
Based on research of the antenna assemble procedure , the simulation model of the reflector is set up and error modeling and simulation of position of stick holes , grid bar acrossing the hole and rms of reflector face are achieved 在分析栅格天线装配过程基础上，建立了其反射面装配的仿真模型，并对栅支板中心圆孔位置误差、栅条穿人误差和栅面误差进行了建模与仿真计算。
