2D FDTD matlab code using CPML ABC

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2D FDTD matlab code using CPML ABC

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The 2D Finite-Difference Time-Domain (FDTD) method is a powerful technique for solving electromagnetic wave propagation problems in complex geometries. This method is widely used in the field of computational electromagnetics due to its accuracy and efficiency. In particular, the implementation of the FDTD method in MATLAB is a popular choice due to the simplicity and flexibility of MATLAB programming.

One of the challenges of using the FDTD method is the accurate modeling of the boundary conditions. Perfectly Matched Layers (PML) is a widely used technique for absorbing outgoing waves at the boundaries of the computational domain. The Convolutional Perfectly Matched Layer (CPML) is an improved version of the PML that uses a convolutional operator to model the absorbing layer.

The implementation of the CPML in MATLAB requires the use of a convolutional operator. This operator can be implemented using the built-in MATLAB functions or by defining a custom function. It is important to carefully choose the parameters of the CPML to ensure accurate absorption of outgoing waves.

Overall, the implementation of the 2D FDTD method with CPML absorbing boundary conditions in MATLAB is a powerful tool for simulating electromagnetic wave propagation in complex geometries.