一种基于曲折枝节去耦的多元滤波天线

A Multi-element Filter Antenna Based on Zigzag Decoupling Structure

针对目前越来越复杂的通信测控要求,提出了一款具有滤波特性的天线单元以及一种有效去除天线单元间耦合的结构。天线单元采用微带天线形式,通过在辐射贴片上开槽的方式实现滤波特性,经测试滤波天线在阻带处增益值下降迅速,滤波频点增益降到-30 dB以下,具备良好的边带滤波特性,反射系数在通带频段内均小于-10 dB,辐射方向图测试结果与仿真结果较为吻合。基于此天线单元,对多元天线的去耦结构进行了研究,经仿真分析并加工实物测试,发现曲折型去耦结构对抑制天线单元间的耦合具有明显作用,在通信频段内隔离度大于20 dB。与现有研究成果相比,该结构具有优势。

To meet the more and more complex requirements of TT&C,an antenna unit with filtering characteristics and a structure to effectively remove the coupling between antenna units are proposed.The antenna unit is in the form of a microstrip antenna,and the filtering characteristics are achieved by slotting the radiation patch.After testing,the gain value of the filtered antenna drops rapidly at the stopband,and the gain of the filtering frequency point drops below-30 dB.It has good sideband filtering characteristics.The reflection coefficient is less than-10 dB in the passband frequency band,and the radiation pattern test results are in good agreement with the simulation results.Based on this antenna unit,the decoupling structure of the multi-element antenna is studied.Through simulation analysis and processing physical test,it is found that the zigzag decoupling structure has an obvious effect on restraining the coupling between antenna units,and the isolation is greater than 20 dB in the communication frequency band.Compared with existing results reported publicly,this structure has advantages.