Application of the potential method for determining the radar cross section of electrically large objects

We consider the problem of determining the radar cross section of bodies which are many wavelengths in size. Under the assumption that the body is perfectly conducting, the electric field integral equation is addressed. In the traditional method of moments, an object which is large enough compared to the wavelength will produce a linear system of equations which is of unreasonable size. In this work we demonstrate how the earlier reported Potential method applies to large objects. In short, the potential method replaces the induced and unknown surface current by a `down sampled´ current which in turn (via Hodge decomposition theorem) is expressed in terms of two scalar functions/potentials. It is demonstrated how this approach leads to a smaller system of equations.