关键词: 反射面天线, 机电耦合, 网格转换矩阵, Gauss积分公式

Abstract:

In the electromechanical coupled analysis of large broad band reflecort antennas, the mesh for structure analysis does not match the mesh for electromagnetism analysis, and diffrerent meshes are requied for diffreent frequencies. For these problemes, the GO method is used for modeling the electromechanical coupled model. A transformation matrix for different meshes has been deducted starting with the structure mesh. The number of nodes for electromagnetism analysis is ensured according to the frequency. This transformation matrix and improved Gaussian integral formula are used to analyze reflecort antennas. Compared with electromagnetism software, a fussy process for girding is avoidable, and much time is saved in computing. Compared with the traditional integral formula, an elevation in computing precision is obvious. Results of simulation demonstrate that the transformation matrix is very accurate and efficient, ant that it could be used in electromechanical coupled analysis of large broad band reflecort antennas. Finally, the mothod presented in this paper is used for a 40 m reflector antenna, with the result accord with practical engineering experience.

Key words: reflector antenna, electromechanical coupled, transformation matrix, Gaussian integral formula