【摘要】 介绍了一种双频段圆锥喇叭天线的设计。作为星载阵列天线单元的圆锥喇叭天线需要满足20/30GHz双频段工作的需要。此处采用在光壁圆锥喇叭内加载一个外形渐变的金属柱体来改变天线的输入阻抗,调节金属柱体的尺寸,包括两端的口径和长度,可以在要求的频段得到理想的输入阻抗。仿真分析和实验测试结果说明该天线具有满意的频带特性和方向图特性。更多还原

【Abstract】 As the element of satellite borne antenna, one new kind of conic horn antenna worked at 20/30 GHz dual band is designed in this paper. By considering a metalcylinder with a shape changed gradually into the conic horn, the input impendence can be changed. By modeling the parameters of metal cylinder such as the diameters of both ports and the length of the metal cylinder, the demand input impedance of the conic horn can be obtained. Both simulation results and measurement results show that the satisfied impedance and pattern characteristics for interested bands are obtained.更多还原