一种Ku波段低剖面圆极化微带天线

A Low-profile Circularly Polarized Patch Antenna in Ku-band

设计了一种应用于Ku波段的低剖面圆极化微带天线。印制板上层辐射体使用双馈点形式的正方形金属贴片,并在同一层上使用高特性阻抗传输线和隔离电阻作为馈电网络。仿真优化后制作出实物并完成了测试。实物测试结果表明,天线在12.6GHz~13.5GHz频段内电压驻波比小于2(相对带宽6.9%),平均增益6.9dBic,轴比小于3dB。该天线具有低剖面、易加工、低成本和电性能良好等优势,可应用于Ku波段的通信系统。

This paper presents a low-profile circularly polarized patch antenna in Ku—band.A square metal patch with double feeding on the top layer of the PCB is utilized as the radiator.In addition,a high-impedance transmission line and an isolation resistance configured on the same layer are realized for the feeding network.After the simulation and optimization,the proposed antenna is also implemented and measured.The re-sults show that the proposed design has a nice impedance bandwidth in 12.33GHz〜13.57GHz of VSWR less than 2(relative bandwidth of 7.7%)with a gain larger than 4.5 dBic and a axial—ratio(AR)less than 3dB.Due to the advantage of low profile,easy manufacture,low cost,and well radiation performance,it possibility has the potential use for Ku-band communication system.