高隔离度双极化微带天线阵的设计

本文介绍了一种新型高隔离度2×2双极化微带天线阵的设计。该天线阵列采用多层贴片,H型缝隙耦合结构,馈网设计中应用错位倒相技术,获得了较高的性能。利用微波仿真软件HFSS进行仿真,结果表明天线2个端口的驻波比小于2的相对带宽均达到12.5%;在工作频带内其双端口隔离度S21高于48dB;并且2个极化端口在其对应主平面方向的交叉极化电平均低于-38dB。此天线可作为新一代多极化SAR系统天线的子阵。

Design of dual-polarized high isolation microstrip antenna array

The paper presented and developed a new dual-polarized H-shaped slot-coupled microstrip patch antenna array, which was based on a slot multi-stacked patch layout and incorporates the anti-phase feeding technique to achieve high isolation dual-polarized radiation. The HFSS results show that the bandwidths of VSWR<2 reaches 12.5% in both ports, and the isolation between the excitation ports is greater than 48 dB over this frequency range. The cross-polarization suppression is lower than -38 dB in both horizontal and vertical ports. This array can be used in SAR system for its high performance.