TE波照射下圆柱RCS计算方法的比较

Comparison of Bistatic Cylinder RCS Calculation Methods in Incidence of TE Wave

运用矩量法、时域有限差分法和解析法对不同电尺寸的无限长圆柱双站RCS进行计算,用时域有限差分法计算时分别采用Mur吸收边界和完全匹配层吸收边界.仿真结果表明矩量法有较高的精度,时域有限差分法效率较高但在某些角度存在误差.研究结果为更好地运用时域有限差分法提供了依据.

The bistatic RCS of different electric-size infinite-long cylinders in incidence of TE plane wave were calculated using the method of moment（MOM）, the finite-difference time-domain（FDTD） and the strict progres-sional solution respectively. The Mur absorbing boundary and the perfectly matched layer（PML） absorbing boundary were taken when using FDTD method. The simulation shows that the result of MOM is in good agreement with the theoretical solution, and FDTD is of high efficiency but there are errors at some angels. The results provide a reason for using FDTD better.