一种新型卫星电视天线的口面修正的仿真研究

Simulating study on the aperture correction of a new kind of antenna for DBS reception

介绍了用于接收卫星直播电视(DBS)的高增益、高效率、小尺寸的径向线缝隙阵新型天线的一种简化分析方法。给出了径向线波导的行波场解和口面缝隙阵排列的修正因子α,并采用LISP语言编写程序自动生成了考虑了口面修正效果的大规模径向线缝隙阵。在将此缝隙阵结构成功导入三维电磁波仿真软件(HFSS)的仿真环境的基础上,研究了不同修正因子α对天线方向图的实际影响。发现修正因子α等于0.5时天线的方向性可达到最优。使用该方法给这种天线的设计带来了极大方便,能灵活调整和优化缝隙的排列,具有直观和精度高的优点。

A simplified analyse method on the new kind of antenna of Radial Line Slot Array used on DBS reception with high gain, high efficiency and small size is introdued. The distribution of travelling wave in the planar waveguide and the aperture correction factor a for the slots array arrangement are given also. And a large-scale Radial Line Slot Array having considered the effect of the aperture correction is produced out with the program wrritened by the LISP language. As leading the slot array structure into the 3D electromagnetic wave simulating environment of HFSS successfully, the real effect forced on the pattern of the antenna under the different correction factor a is studied. And it can be found that the best directional pattern of the antenna is obtained as the correction factor a equals 0. 5. This method can flexibly adapt and improve the slots arrangement, which brings convenience directness and accuracy to the design of this kind antenna.