可用于相控阵的双点馈多层圆极化微带天线

一种可用于相控阵的双点馈多层圆极化微带天线

内容简介：设计出了一种双背馈空气夹层微带圆极化天线单元，该天线单元具有13％的阻抗带宽，最大辐射方向上轴比2.5dB。用该天线单元以顺序旋转的方式组成四元阵，再用八个该天线单元和两组一分八功分器组成八单元阵列，研究了该阵列天线圆极化波束分别指向天线阵法向和偏转30°时的辐射特性和极化特性。该天线单元组阵圆极化轴比特性好，易于实现波束扫描，适合用于有源相控阵系统。

Abstract：A planar dual-back-fed circularly-polarized microstrip antenna is proposed based on the air mi- crostrip structure. The element has 13% impedance bandwidth and the axial ratio of maximum radiation direction is 2.5 dB. Based on the element design, a rotationally symmetric four-element array is also de- signed. Furthermore, in order to verify the circularly-polarized beam scanning characteristics of antenna array, an eight-element array is composed by eight elements and two power splitters to realize the beam pointing to the normal direction and 30° deviation respectively. The antenna owns good circular polarization axial ratio and is easy for beam scanning, which is very suitable for the active phased array applications.

作者：闫鹏, 李阳, 李振海, 白旭东, 金荣洪, 耿军平, 梁仙灵,

关键词：圆极化天线, 轴比, 旋转结构, 波束扫描,