Development Of Visualized Electromagnetic Modeling System Based On FDTD Algorithm

In this paper, the FDTD algorithm for solving the MAXWELL equations is introduced. According to the the FDTD algorithm and computer visualization technology, the paper establishes the modeling algorithm and the mesh generation algorithm. The FDTD MESH Generator System (software) which has abundance of graphics' processing functions is designed in this paper.The system describes the electromagnetic parameter files directly, such as medium file, geometry file, mesh file, boundary file, input file which described in the form of text is realized in modularization and visualized by utilizing the Visual Basic computer language.The system accomplishes some complicated assignments such as the mesh generation and the model dissection by utilizing the computer technology, so the user can concentrate on optimizing the model parameters and perfect the construction of the model.The system displays the description of the electromagnetic parameters directly, especially in mesh generation and mesh verification, it can generate the mesh in the style of users' requirement and find out the coordinates automatically which disobey the FDTD algorithm. It provides the 3D display of the meshed model. The system adopts the staircase approach the boundary of irregular object and it can generate circular object automatically. The system displays the simulation result in different line style and color.Through modeling objects and describing electromagnetic parameters and putting electromagnetic files into FDTD simulation software, we can get the FDTD analysis result, and observe it directly. Patch antenna, BLPF and the U-shaped antenna modeled in this paper indicate that the electromagnetic modeling system is precise and efficient.