波导裂缝天线单元结构设计

Structure Design of Slotted Waveguide Antenna Element

随着现代雷达技术的发展,波导裂缝天线单元之间的间距越来越小,安装位置精度越来越高,常规的结构形式很难满足波导裂缝天线单元结构设计的新需求,迫切需要一种新的结构形式来解决上述问题。文中在分析波导裂缝天线结构设计新需求的基础上,提出了一种新的结构形式,对开缝波导管、负载和波导同轴变换器进行了结构设计研究,并对波导裂缝天线单元的安装方式、安装位置精度和内腔防护进行了详细叙述,解决了波导裂缝天线安装困难和位置精度不高的难题。该天线已应用在某双极化有源相控阵雷达中,取得了很好的效果,验证了其结构设计的合理性。

With the development of modern radar technology,the spacing between slotted waveguide antenna elements is becoming smaller and smaller and the installation position accuracy of slotted waveguide element is getting higher and higher.It is difficult for the conventional structure to meet the new requirements of structure design of slotted waveguide antenna element,so a new structure is urgently needed to solve the above problems.A new structure is proposed in this paper according to the new requirements of the structure design of slotted waveguide antenna.The structure design of slotted waveguide,absorption load and coax-waveguide transformer is studied.In addition,the installation method,installation position accuracy and inner cavity protection of slotted waveguide antenna element are described in detail,which solves the problems of difficult installation and low position accuracy of slotted waveguide antenna.This new antenna has already applied to a dual polarization active phased array radar and good results are obtained,which verifies the rationality of the structure design.