Abbreviated analysis of electromagnetic fields based upon locality of scattering phenomena

In the high frequency, the scattering field is given by the currents not only on the entire region but on the local areas which correspond near the inner and edge stationary phase points as is defined by the GTD. Therefore, scattering field can be approximated by integrating the currents on these local areas. We examined analysis method of the currents and surface-integrals in local areas. In case of 2-dimensional scatterer, areas where the currents are calculated by the method of moments can be localized. In the case of 3-dimensional scatterer, localization of physical optics radiation integrals is achieved.