电磁带隙微带天线馈源阵设计
Design of focal-plane array with electromagnetic bandgap structure
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摘要: 针对阵列天线在大反射面馈电中的应用，设计一种基于电磁带隙（EBG）结构的馈源阵列。在深入研究EBG结构带隙特性的基础上，制作一个基于EBG结构的六边形7元微带天线阵，并对其性能进行了实测和分析。结果表明：EBG结构可以有效抑制天线阵元之间的互耦，改善天线匹配及圆极化特性；基于EBG结构的六边形馈源阵列较无EBG结构性能有较大提高，适用作反射面天线的焦平面馈电阵。Abstract: A hexagonal focal-plane array of microstrip antennas with electromagnetic bandgap (EBG) structure is proposed. After an in-depth study of EBG structure to suppress mutual coupling between antennas, a hexagonal seven-element microstrip antenna array with EBG structure for reflector antenna is designed and measured. The results show that the EBG structure can suppress the mutual coupling between array elements, improving the matching condition and circular polarization performance of the antenna array. The hexagonal array with EBG structure is competent for the focal-plane array of reflector antenna.
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