平板裂缝天线热加工误差数值仿真及其对天线电性能的影响  

Numerical Simulation of Manufacturing Errors from Braze Welding for Planar Slotted Waveguide Antennas and Its Effects on Antenna Electromagnetic Performance

作　　者：肖志城[1] 朱敏波[1] 宋立伟[1] 段宝岩[1] 

机构地区：[1]西安电子科技大学电子装备结构设计教育部重点实验室,陕西西安710071

出　　处：《电子机械工程》2014年第5期41-47,64,共8页Electro-Mechanical Engineering

基　　金：国家自然科学基金资助项目(51365003;51405364);中央高校基本科研业务费项目

摘　　要：基于学科交叉,文中研究了热加工对平板裂缝天线电性能的影响问题。首先,应用热弹塑性理论和生死单元技术,模拟了降温曲线、焊料及工装方式3种不同因素对天线残余应力、变形的影响。然后,文中提出了结构位移场与电磁场的场耦合理论模型,研究了热加工误差对天线电性能(增益、副瓣电平等)的影响。最后,将理论与方法应用于某机载平板裂缝天线的实际工程中,取得了较为满意的结果。The effect of braze welding on the electromagnetic performance of planar slotted waveguide antennas is studied based on inter-disciplinarity. Firstly, according to thermal elastic-plastic theory and birth-death tech- nique, the impact of three factors including cooling curve, solder and clamping method on the antenna＇s residual stress and deformation is simulated. Secondly, on the basis of fields coupled mathematical model between structural displacement field and electromagnetic field, the influence of manufacturing errors from braze welding on the antenna＇s electromagnetic performance （gain, side lobes, etc. ） is explored. Finally, the theory and method are applied to an airborne planar slotted waveguide antenna, some satisfactory results are obtained.

关 键 词：平板裂缝天线 焊接变形 降温曲线 焊料 工装方式 电性能 

分 类 号：TN823.24[电子电信—信息与通信工程] TG457[金属学及工艺—焊接]