Absorbing boundary conditions (ABC's) are developed that can be applied on object-conformable outer boundaries. The new ABC's are based on the local enforcement of the N N Nth order Bayliss-Turkel boundary conditions where a scattering center is defined for each outer boundary node. A demonstration of the effectiveness of the new construction is provided by considering representative numerical experiments using the finite-elements method. Results show that the new ABC's provide accuracy that

more »

... pares very favorably with the method of moments solution. Index Terms-Absorbing boundary conditions, finite-elements method.