Application of Point-in-Domain Algorithms in Near Field Calculations for Geometries with Bilinear Surface Patches

In computational electromagnetics (CEM), approximately evaluated equivalent currents cause slight errors in calculated near field. For some applications, e.g., in microwave imaging, even this slight error can be impossible to cope with. To improve accuracy of near field calculation, we introduce a refined approach. This approach uses information of a domain to which an observation point belongs to calculate near field with improved accuracy. Such information is obtained using “point-in-domain” algorithm. In this paper we present a refined approach of near field calculation, introduce two point-in-domain algorithms for geometries with bilinear surface patches, and compare their performances.