FDTD Algorithm Implementation for Calculating 2D Conductor Square Cylinder Scattering Field RCS

This MATLAB program implements the Finite-Difference Time-Domain (FDTD) algorithm to calculate the Radar Cross Section (RCS) of a two-dimensional conductor square cylinder's scattering field. The code employs Uniaxial Perfectly Matched Layer (UPML) absorbing boundary conditions to minimize numerical reflections and uses Gaussian pulse excitation for broadband analysis. Key implementation aspects include: - Source injection technique using Gaussian pulse waveform with adjustable bandwidth parameters - Near-to-far-field transformation algorithm implementing surface equivalence principles - UPML boundary layer configuration with graded conductivity profiles - Field component updating equations following Yee's staggered grid scheme For FDTD learners, this program serves as an excellent educational tool for understanding fundamental concepts including source implementation methods, near-field to far-field conversion algorithms, and absorbing boundary condition setups. The code demonstrates practical RCS calculation methodology, which forms the basis for numerous electromagnetic applications in computational electromagnetics. This implementation not only helps students grasp FDTD algorithm fundamentals but also establishes a solid foundation for future studies and research in electromagnetic scattering analysis.