L形探针耦合馈电E形层叠微带天线

摘要

设计了一种L形探针耦合馈电的宽频带E形层叠微带天线.通过在具有双峰谐振特性的E形贴片天线上方加载寄生元,构成三峰谐振特性,进一步展宽天线带宽;采用L形探针对E形贴片进行耦合馈电,避免了普通探针馈电引入附加电感的缺陷,从而提高天线的辐射效率.对提出的天线进行仿真设计及优化,实现了37.8％的阻抗带宽(VSWR＜ 2),带内增益＞7.6dBi,平均增益达到8.7dBi,交叉极化隔离度＜-52 dB.%A broadband E-shaped stacked microstrip antenna is presented using L-probe proximity fed in this paper.A parasitic patch is added on the top of the E-shaped patch antenna formming triple resonant frequencies for enhancing the bandwidth of the antenna.The proposed antenna is fed by L shaped probe for avoiding additional inductance with high radiant efficiency.With optimized design of the proposed antenna,the relative bandwidth (VSWR ≤2) of 37.8％ is achieved,while the gain at the bandwidth is larger than 7.6dBi,average gain is 8.7dBi and the cross-polarization is less than-52 dB.