脊波导缝隙圆极化天线的设计

发布时间：2018-03-22 03:32

  本文选题：脊波导缝隙天线　切入点：圆极化　出处：《微波学报》2014年06期 　论文类型：期刊论文

【摘要】：设计了一种新型脊波导缝隙圆极化天线。在脊波导宽边开并联纵缝,从波导耦合电磁波至其上方的四脊波导圆极化器,实现圆极化辐射。采用脊波导不仅减小了单元尺寸,更改善了天线的带宽性能。重点研究了四脊波导圆极化器对相互垂直的两辐射场分量的影响,优化单元的轴比特性。在提取单元谐振电导的基础上,设计了工作在10GHz的1×10圆极化波导缝隙阵列。对天线实物测试得到中心频率处的增益为16.8d B,第一副瓣电平为25d B,阻抗带宽约为8.5%,相对轴比带宽(AR≤3d B)约为3.2%。
[Abstract]:In this paper, a novel circular polarization antenna for ridged waveguide slot is designed. A parallel longitudinal slot is opened at the wide side of the ridge waveguide, and the circular polarization radiation is realized by a four-ridge waveguide polarizer from the waveguide coupling electromagnetic wave to the top of the waveguide. The use of the ridge waveguide not only reduces the size of the element, but also reduces the size of the waveguide. Furthermore, the bandwidth performance of antenna is improved. The influence of four-ridge waveguide circular polarizer on the components of two radiation fields perpendicular to each other is studied, and the axial ratio characteristic of the element is optimized. On the basis of extracting the resonant conductance of the element, the resonant conductance of the cell is extracted. A 1 脳 10 circularly polarized waveguide slot array operating in 10GHz is designed. The gain at the center frequency is 16.8 dB, the first sidelobe level is 25 dB, the impedance bandwidth is about 8.5 dB, and the relative axis ratio bandwidth AR 鈮，

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