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一种新型小型化导航四臂螺旋天线
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Abstract:
四臂螺旋天线具有良好的圆极化辐射方向图，良好的低仰角增益，且具有结构简单紧凑的优点，在通信、导航等领域具有广泛的应用。针对传统四臂螺旋天线一般由金属线绕制而成，或者通过柔性基板印制后卷成圆柱形或者圆锥形所带来的复杂工艺问题，本文采用3D打印实现了一款轻量化小型化的介质镂空型圆极化四臂螺旋天线。天线采用多馈点设计，保证天线相位中心和几何中心的重合，测试结果表明在1.59 GHz的轴比小于1.5 dB，增益为1.68 dBi。该四臂螺旋天线具有潜在的实际应用价值。
The four-arm helical antenna has the advantages of favorable circular polarization radiation pattern, good low elevation gain, and boasts a simple compact structure. This makes it broadly applicable in areas such as communication and navigation. In view of the complicated processing technological problems caused by the traditional four-arm helical antenna which is usually wound by metal wire or printed by flexible substrate and then rolled into a cylinder or cone shape. In this paper, a lightweight and miniaturized dielectric hollow circular polarization four-arm helical antenna is designed and realized by using 3D printing. The antenna adopts a multi-feed point design to ensure the coincidence of the phase center and the geometric center of the antenna. The experimental results show that in a working frequency of 1.59 GHz, the axial ratio is less than 1.5 dB, and the gain is about 1.68 dBi. The four-arm helical antenna has potential practical application value.
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