在国外学者关于多焦点抛物面天线设计思想的基础上,针对多波束天线设计中各馈源位置已知的情况,提出了一种改进的多焦点抛物面天线设计方法.利用其对反射面进行赋形,设计了馈源位于±270 mm,±150 mm,0 mm的五焦点抛物面天线,通过优化基础抛物面加权系数,使得边缘波束与中心波束之间的增益差与标准反射面相比减少了0.76 dBi和0.2 dBi,使得覆盖区域内每个波束的增益趋于平均,并且满足低旁瓣的要求.%Based on the design philosophy of overseas scholars about multi-focus parabolic reflective surface,in allusion to the known feed source locations in multi-beam antenna design,a design method of improved multi-focus parabolic reflective sur-face is proposed. The five-focal parabolic antenna with the feed source located at ±270 mm,±150 mm,0 mm was designed by means of the method to shape the reflective surface. The gain difference between the edge beam and central beam is reduced by 0.2 dBi and 0.7 6dBi by optimizing the weighting coefficient of the fundamental paraboloid,which makes the gain of each beam in the coverage area average,and meets the requirements of the low side lobe.
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