薄膜印刷折合振子的设计

Design of Thin-membrane Printed Folded Dipole

对基于薄膜结构的印刷折合振子进行了研究,通过垂直过渡宽带巴伦将共面波导变换为共面平行带线对印刷折合振子进行平衡馈电。从仿真结果中可知,这种天线单元具有较宽的带宽,良好的辐射特性,天线性能受薄膜层平整度的影响较小,并且底层的馈电网络采用共面波导传输线,解决了薄膜天线辐射单元与T/R组件连接的问题。这种天线单元形式的研究对降低大口径轻型可展开天线系统的存储体积、重量和制造成本有重要的意义。

A printed folded dipole which based on thin-membrane structure is studied in this paper.This thin membrane printed folded dipole is fed by coplanar stripline,which is transited from coplanar waveguide through a vertical transition wideband balun. From the simulation result,we know that this printed folded dipole has wide bandwidth,good radiation characteristic and the performance is less influenced by the change of membrane spacing.The use of coplanar waveguide in the feed network solves the problem of connection between printed folded dipole and T/R module.The study of thin membrane printed folded dipole is significant to reduce the mass,stowage and the cost of larger-aperture lightweight deployable antenna system for future.