Abstract: A finite element method with perfectly matched layers(PML) is developed for wave scattering from a two-dimensional cavity embedded in an infinite ground plane. Based on a variational formulation it uses the PML technique to truncate an unbounded computational domain to a bounded one. Hence, a PML problem instead of the original scattering problem is solved. Convergence of the PML problem to the scattering problem is analyzed. Numerical experiments illustrate competitive behavior of the proposed method.

Key words: cavity, perfectly matched layers, finite element method