【摘要】 本文设计了一款新型微带栅格阵列天线.为了拓展天线带宽,辐射单元采用非均匀尺寸的菱形结构,在介质基板与地板间加入空气层,采用探入式同轴探针对天线进行馈电.单元间微带传输线采用正弦曲线结构,极大地减小了天线的辐射口径.天线面积为290×205 mm²,共包含7个菱形辐射单元.通过建模仿真和扫参分析,结果表明,天线的阻抗带宽(|S₁₁|<-10 dB)为13.0%（2.30 GHz～2.62 GHz）.在工作频率2.45 GHz处,天线的最大增益达到15.4 dBi,交叉极化小于-25 dB,旁瓣电平低于-15.6 dB.更多还原

【Abstract】 A novel microstrip grid array antenna is proposed in this paper. To extend the bandwidth of the antenna, the radiation elements adopt rhombic structure with non-uniform size. An air layer is added between the dielectric substrate and the ground plane, and a penetrating coaxial probe is utilized to feed the array. The microstrip transmission line between cells adopts sinusoidal curve structure, which greatly reduces the radiation aperture of the antenna. The aperture size of the antenna is 290×205 mm² and contains 7 rhombic radiation elements. By using the parameter sweep, the simulated results show that the impedance bandwidth of the proposed The microstrip transmission line between cells adopts sinusoidal curve structure antenna(|S₁₁|<-10 dB) is 13.0%（2.30 GHz～ 2.62 GHz）. At the operating frequency of 2.45 GHz, the peak gain reaches up to 15.4 dBi, the cross-polarization is less than-25 dB, and the side lobe level is less than-15.6 dB.更多还原