Abstract
The surface integral equations (SIEs) are used to describe the electromagnetic (EM) problems with composite objects including both conducting and dielectric media. At low frequencies, the $\mathcal{L}$ operator in the SIEs tends to break down and the augmented electric field integral equation (AEFIE) was proposed for conducting objects. Later on, the AEFIE was extended to AEFIEs for dielectric objects, but the dual basis function (DBF) is needed to represent the magnetic current density in the method of moments (MoM) solutions. We consider the EM modeling for composite objects in this work and hybrid field integral equations (HFIEs) are proposed to govern the dielectric part. The HFIEs are augmented into AHFIEs which are combined together with the AEFIE of conducting part for the low-frequency modeling of the whole structure. A numerical example is presented to demonstrate the method which shows good performance.
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