考虑馈源位置误差的面天线机电耦合优化设计

 针对面天线结构设计中存在的机电分离以及忽视馈源位置误差的问题,从机械电磁两场耦合的角度,将反射面天线主面误差和馈源位置误差统一到天线方向图的远场计算公式中,从而可以研究包含馈源支撑结构在内的天线结构参数对主要电性能（包括增益、副瓣、波瓣宽度、指向精度等）的影响。利用该公式建立了包含馈源支撑结构参数的天线整体机电耦合优化模型,通过某8米天线的仿真对比表明了该耦合优化模型的优点,最后将该优化模型应用于某40米大型反射面天线,取得了满意的效果。

Electromechanical Coupling Optimization Design of Reflector Antennas Including Feed Position Error

For the problem of electromechanical separation and negligence of feed position error in reflector antenna design. From the angle of electromechanical coupling, the distortion of main reflector and position error of feed were introduced in the formula of antenna’s far field pattern. So the effect of structure parameters including feed support structure on the main electrical parameter (such as gain, side lobe, beam width, pointing accuracy) could be researched. Due to the proposed formula, a new electromechanical coupling optimization model of whole antenna including feed support structure parameters was proposed. Simulation was done via an 8m reflector antenna. Result shows that the optimization model is more efficient than tradition ones. Finally the proposed optimization model is applied to a 40m reflector antenna with good results.