A comparison of implementations of a combined charge and current formulation of the method of moments

The Method of Moments (MoM, also referred to as the Boundary Element Method outside of electromagnetics [1]) is a well-known and oft-used technique for complex electromagnetics simulations based on a numerical approach to Maxwell´s equations. Results can be very accurate, but as it requires solving a dense matrix equation it is very computationally intensive. MoM has traditionally been used for narrow-band antenna simulations, but thanks to advances in processing power and in the technique itself, it is slowly becoming feasible to perform simulations of electrically large objects and of diverse scenarios over a broad frequency band.