New Implementations of Complete Radiation Boundary Conditions for Maxwell's Equations

We describe a new approach for implementing arbitrary-order local radiation boundary condition sequences for Maxwell's equations designed to have a straightforward interface with standard element-based volume schemes. Our goal is to develop easy-to-use software utilizing complete radiation boundary conditions. These implicitly apply uniformly accurate exponentially convergent rational approximants to the exact radiation boundary conditions. Numerical experiments for waveguide and free space problems using high-order discontinuous Galerkin spatial discretizations are presented.