Numerical Calculation of Complex Object RCS Based on FDTD Method

It is difficult to calculate the RCS of complex object by using the FDTD method. To solve this problem,the Auto LISP programming language embedded in Auto CAD is applied. Based on this language,the geometry and electromagnetic parameters document of scatter can be established. By transferring this document,the RCS of complex object can be calculated by FDTD approach. To validate the correctness of this method,the 3D solid sphere is taken as an example. The geometry and electromagnetic parameters document of this sphere is obtained. Also,the RCS of this sphere is calculated by using FDTD approach. In order to validate the results,this paper compares the results in classical literatures with them. Results show that the results in this paper are correct.