一种应用于卫星通信的小型双频天线设计

Design of a miniaturized dual-frequency antenna for satellite communication

文章提出一种应用于卫星通信的小型化双频天线。为了实现天线的小型化和双频段工作,在圆形单极子天线上进行了削顶和矩形切割操作;为了有效扰动电流路径而进一步缩小天线尺寸、扩大天线带宽,在天线上表面和下表面又分别刻蚀了圆环槽和对称C型槽,改善天线的阻抗匹配。天线最终尺寸为16mm×18.5mm×1.6mm。利用电磁仿真软件对天线性能进行了仿真,结果表明:该天线能够在4.76GHz~9.25GHz和10.46GHz~14.2GHz两个频段内工作,最大增益为5.9dBi,平均增益为4dBi,且满足圆极化条件,具备良好的辐射特性。

In this paper,a miniaturized dual-band antenna for satellite communication is proposed.In order to realize the miniaturization of the antenna and dual-band operation,the topping and rectangular cutting operations are carried out on the circular monopole antenna;In order to effectively disturb the current path and further reduce the size of the antenna and expand the antenna bandwidth,the torus groove and symmetrical C-slot are etched on the upper and lower surfaces of the antenna to improve the impedance matching of the antenna.The antenna final size is 16mm×18.5mm×1.6mm.The electromagnetic simulation software is used to simulate the performance of the antenna,and the results inctcate that the antenna can work in 4.76GHz~9.25GHz and 10.46GHz~14.2GHz,which the maximum gain is 5.9dBi and the average gain is 4dBi with the circular polarization and good radiation characters.