基于基片集成同轴线的双馈点圆极化天线

An SICL-based dual-feed circularly polarized cavity-backed patch antenna

摘要:

提出了一种采用基片集成同轴线(SICL)馈电的双馈点圆极化微带贴片天线。具体通过多馈点法实现圆极化，并通过背腔加载提高增益，增加带宽，减小后瓣，降低互耦，提高天线性能。经过仿真验证，该天线能够在42.42~56.69 GHz之间实现S₁₁<-10 dB(相对带宽为28.8%@51 GHz)，在45.26~48.08 GHz之间实现轴比小于3 dB，最大增益8.9 dBi。

Abstract:

A dual-feed circularly polarized patch antenna based on Substrate Integrated Coaxial Line(SICL) feed is proposed. Dual-feed point method is utilized to realize circular polarization. With the backed cavity, the antenna performance, for example, the bandwidth, the back lobe, the mutual coupling and the structure miniaturization, has been improved. Simulation results show that the antenna can achieve S₁₁<-10 dB(relative bandwidth is 28.8%@51 GHz) at 42.42~56.69 GHz, and the axial ratio is less than 3 dB and the maximum gain is 8.9 dBi at 45.26~48.08 GHz.