The MEI-MoM method for solving conducting concave scattering

A hybrid numerical approach, the MEI-MoM method, which combines the measured equation of invariance method (MEI) combined with the method of moments (MoM), is presented for solving the problem of deep concave conducting scattering. Although the MEI as a fast computation method has been demonstrated to be robust, it still has problem when used in scatterers with deep concave parts. Examples of both TM and TE plane wave scattering from a deep concave conducting scatterer show that results of the MEI-MoM method are in excellent agreement with those of using the MoM alone. It is observed, however, the inaccuracy of the MEI method is only present within the concave region, so, an application afterwards of the MoM limited to the concave region should correct the result and it does.