一种基于紧耦合结构的超宽带天线阵列设计  

Design of an Ultra-wideband Antenna Array Based on the Structure of Tightly Coupled

作　　者：陈常青 周志鹏[1] 张金平[1] 

机构地区：[1]南京电子技术研究所

出　　处：《现代雷达》2018年第2期73-76,共4页Modern Radar

摘　　要：设计了一种超宽带紧耦合天线阵列，该超宽带天线由两层印刷有偶极子单元的周期结构构成，上层互不相连的偶极子单元为寄生层，下层在E面增加了强耦合结构的偶极子单元为辐射单元层。馈电网络由Marchaned巴伦和宽带Wilkinson功分器组成。仿真结果表明：天线法向辐射时在0.9GHz-4．8GHz内具有良好的阻抗匹配带宽（VSWR〈2），在1GHz～4GHz频段内可以实现E面60°、H面45°的扫描范围。该天线具有超带宽、大扫描角、轻薄化等特点，在超宽带小型化相控阵天线中有良好应用前景。A uhra-wideband tightly coupled array is proposed. The antenna consists of two layers of printed dipole unit. The dis- connected dipole located in the top is parasitic layer. The unit that is increased the coupling structure at E-plane is radiation lay. Feed network is composed of Marehaned balun and broadband Wilkinson power dividers. The simulation results show that the antenna achieves 0.9 GHz - 4. 8 GHz bandwidth for VSWR 〈 2 , and have E - plane 6 0 ° , H - plane 4 5 ° scanning range in 1 GHz ~ 4 GHz. This antenna has characteristic of broad bandwidth, large scan angle, and lightweight , which can be applied to small uhra-wideband phased antenna array system.

关 键 词：超宽带 紧耦合阵列天线 寄生层 Marchaned巴伦 轻薄化 

分 类 号：TN82[电子电信—信息与通信工程]