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本文提出了一种新型的含有金属通孔的双层传输阵列天线结构,传输单元由两层含有缝隙的正方形金属贴片组成,两层之间由四个垂直金属通孔连接,通孔同时对两个贴片进行耦合,这种结构可以实现更为平滑的360度相位变化。根据此单元设计了一个工作在22GHz的传输阵列天线,并利用HFSS软件进行建模优化,仿真结果表明在中心频段处天线的口径效率为31.4%,增益可达到25.9d Bi。整个天线阵列口径的厚度为0.17λ0,缩减了传输阵列天线的纵向尺寸。
In this paper, a novel double-layer transmission array antenna structure with metal through-holes is proposed. The transmission unit is composed of two layers of square metal patches with slots. The two layers are connected by four vertical metal through-holes, Coupling two patches, this structure can achieve a smoother 360-degree phase change. According to this unit, a transmission array antenna operating at 22GHz is designed and modeled using HFSS software. The simulation results show that the aperture efficiency of the antenna is 31.4% and the gain can reach 25.9d Bi at the center frequency. The thickness of the entire antenna array aperture is 0.17λ0, reducing the longitudinal size of the transmission array antenna.