Comparison Between Arrays of Rotating Linearly Polarized Elements and Circularly Polarized Elements
Comparison Between Arrays of Rotating Linearly Polarized Elements and Circularly Polarized Elements
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DOI：
10.1109/tap.2008.928783
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发表时间：
2008-09
影响因子：
5.7
通讯作者：
A. Bhattacharyya
中科院分区：
文献类型：
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作者：
A. Bhattacharyya
介绍了由旋转线偏振 (LP) 元件和混合馈电 CP 元件组成的圆偏振 (CP) 阵列的增益和带宽特性。研究发现，对于小元件间距，LP元件阵列的增益与CP元件阵列的增益相当；然而，对于大元件间距，前者的增益明显低于后者。此外，旋转LP元件阵列的带宽比CP元件阵列的带宽窄。带宽差异通过 Floquet 模态理论和贴片天线的腔体模型进行解释。使用全波分析研究了增益和带宽随元件间距的变化，并显示了槽馈电和探头馈电贴片阵列的结果。讨论了旋转 LP 元件阵列的优点和缺点。
The gain and bandwidth characteristics of circularly polarized (CP) arrays comprising of rotated linearly polarized (LP) elements and hybrid-fed CP elements are presented. It is found that for small element spacing, the gain of the LP elements' array is comparable with that of the CP elements' array; however for large element spacing the former shows significantly lower gain than the latter. Furthermore, the bandwidth of a rotating LP elements' array is narrower than that of a CP elements' array. The bandwidth difference is explained invoking Floquet modal theory and the cavity model of a patch antenna. Variations of gain and bandwidth with element spacing are studied using a full wave analysis and the results for slot-fed and probe-fed patch arrays are shown. The advantages and disadvantages of rotating LP elements' arrays are discussed.