【作者】 褚庆昕； 汪亚楠；

【Author】 CHU Qing-xin;WANG yanan;South China University of Technology;

【机构】 华南理工大学；

【摘要】 为了减小空间占有和降低运营成本,共口径天线阵列已经成为移动通信基站、卫星通信系统、雷达系统中的应用热点。为了减小共口径天线阵列中天线单元间的耦合,透波天线技术应运而生、方兴未艾。本文提出的一种适用于共口径基站天线阵列的新型透波天线,该双极化天线由一对正交的环形偶极子耦合多种陷波结构而成,实现了带宽更宽、选择性更好的二阶陷波特性,同时在透波频段,陷波结构上的感应电流与振子臂上的感应电流幅度相等、方向相反,使得感应场相互抵消,从而保证了激励天线辐射方向图的保形。此外,陷波结构的引入使得透波天线在自身工作频带内产生了一个新谐振点,从而拓宽了阻抗匹配带宽。仿真和测试结果显示,透波天线在1.7-2.7GHz频段内保持良好的带内工作特性的同时,在3.1-4.2GHz频段内的带外增益抑制水平超过17dB,且具有高选择性。更多还原

【Abstract】 A novel electromagnetic(EM) transparent antenna operating in high band(HB) from1.7 to 2.8 GHz with second-order notched band in C-band(CB) from 3.1-4.0 GHz is proposed for an aperture-shared base-station antenna array. A second-order notched band with higher selectivity is achieved by the proposed antenna and it is applied to a dual-band aperture-shared array with four CB antennas to prove its EM transparency. Simulated and measured results demonstrate that while maintaining excellent performance in HB, the proposed antenna achieves a high gain suppression level exceeding 17dB and a high selectivity in CB. The radiation patterns of the CB antennas evidence the excellent EM transparency of the proposed antenna.更多还原