简洁构型与馈电的宽带双极化金属锥阵列天线

Compact Configuration and Feeding Broadband Dual-Polarized Metal Cone Array Antenna

本文提出了一种宽带双极化金属锥阵列天线。该阵列天线以传统的旋转体天线结构为主体,通过在锥体底部开设四道正交的直通槽,以便在锥状单元内部形成可与地板间构成匹配谐振腔的开放式空腔结构。在阵列中,任意两个相邻的锥状单元之间可形成类似于Vivaldi天线的辐射缝隙结构。馈电采用同轴馈电方式,探针无弯折结构,金属锥体无弯折过孔。每个金属锥状单元独立,可极大简化加工、装配和维护过程。该天线具有两个正交极化,分别由左右和前后相邻单元构成。仿真结果表明,在频率范围为2~8GHz内,阵列大部分有源VSWR小于2,小部分端口有源VSWR小于2.5(相对带宽为120%)。

This paper proposes a broadband dual-polarized metal cone array antenna.The array antenna is based on the traditional body of revolution-element antenna structure,and four orthogonal through slots are opened at the bottom of the cone to form an open cavity structure that can form a matching resonant cavity with the floor inside the cone unit.In the array,a radiation gap structure similar to a Vivaldi antenna can be formed between any two adjacent cone units.The feed adopts coaxial feed mode,the probe has no bending structure,and the metal cone has no bending hole.Each metal cone unit is independent,which can greatly simplify the processing,assembly and maintenance process.The antenna has two orthogonal polarizations,which are formed by left and right and front and back adjacent units respectively.Simulation results show that in the frequency range of 2-8GHz,most of the active VSWR of the array is less than 2,and a small part of the port active VSWR is less than 2.5(relative bandwidth is 120%).