一种新式串行馈电同时多波束微带天线的设计

摘要

For larger scale serial feed Blass multi⁃beam networks,complexity is one of its essential problems. A simplified design method is proposed through a reduction in types of 90° couplers,and a novel serial feed simultaneous multi⁃beam network consisting of microstrips is presented through this method. An S⁃band simultaneous two⁃beam antenna is used to verify the structure as an example. Especially,the structure of the serial feed simultaneous two⁃beam network and the 90° coupler are designed.A theoretical and simulation analysis is made for errors caused by simplification. Then the antenna array matching with the feed network is designed. The two⁃beam antenna is fabricated and tested.The test result is consistent with the simulated result,which confirms the validity of this design.%针对较大规模的串行馈电Blass多波束网络设计的复杂性，通过减少90°耦合器的种类提出了一种简化的设计方法，利用该方法给出了一种新式的微带线结构串行馈电同时多波束网络，并以S频段同时两波束的天线为例进行了设计验证。重点设计了串行馈电同时两波束网络的结构以及馈电网络关键的组成单元90°耦合器，并对简化带来的误差进行了重点的理论和仿真分析，设计了与馈电网络匹配的天线阵。对设计好的两波束天线进行了实物加工和测试，测试结果与仿真结果吻合较好，验证了设计的正确性。