An experimental study on 2/spl times/2 sequential-rotation arrays with circularly polarized microstrip radiators
An experimental study on 2/spl times/2 sequential-rotation arrays with circularly polarized microstrip radiators
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DOI：
10.1109/8.633850
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发表时间：
1997-10
影响因子：
5.7
通讯作者：
U. Kraft
中科院分区：
文献类型：
--
作者：
U. Kraft
以实现XPD/spl / 30db带宽最大化为目标，实验研究了2/spl倍/2顺序旋转单馈圆极化贴片辐射阵列的辐射特性。在此基础上，分析了单元极化、互耦合、有限对称和激励误差等因素对阵列交叉极化的影响。结果表明，可以获得紧凑的配置，在高达2.0%的带宽上提供30db的轴上XPD，在高达1.0%的带宽上提供35db的XPD。这些阵列显示出-18 dB以下的共极化副瓣和-20 dB以下的离轴峰值交叉极化电平。
The radiation properties of 2/spl times/2 sequential-rotation arrays with single-feed circularly polarized patch radiators are investigated experimentally with the goal to maximize the bandwidth for an XPD/spl ges/30 dB. Based on a particular cross-polarization discrimination (XPD) description for such arrays, the impacts of element polarization, mutual coupling, limited symmetry, and excitation errors on the array cross polarization are presented. It is shown that compact configurations can be obtained, which provide an on-axis XPD of 30 dB over up to 2.0% bandwidth and of 35 dB over up to 1.0%. These arrays exhibit copolarized sidelobes below -18 dB and off-axis peak cross-polarization levels below -20 dB.