矩形波导远区散射场的光学分析

CPTICAL ANALYSIS OF FAR-ZONE SCATTERING FIELD OF RECTAGULAR WAVEGUIDE

将高频光学法与广义散射矩阵技术相结合,分析计算了矩形波导在终端短路和终端介质材料两种状态下的远区电磁散射,计算与实测结果吻合较好,且优于维特的计算结果。本方法可用于飞行器进气道和尾喷管电磁散射特性的分析。

This paper presents an analysis of the far-zone electromagnetic scattering ofrectangular waveguides terminated by a perfect electric conductor and by a medium material by means of the generalized scattering matrix technique. The optical methods used in analysing the scattering matrixes of a rectangular waveguide involve use of the method of equivalent currents for analysing the [S11],the edge back-scattering matrix of the apture, of the physical optics and the physical theory of diffraction for analysing the scattering matrix [S12] of waveguuide modes, of the reciprocity theorem for determing the exciting matrix [S21] of waveguide modes from [S12],and of the transmission line theory for analysing the [Sb],the reflection matrix of the termination. Finally, the numerical calculation is mode on the basis of theory analysis, the results are proved, to be superior to that of Witt's.