Delta-Gap Source Excitation Model in Surface-Volume-Surface Electric Field Integral Equation for 3-D Interconnect Characterization

A delta-gap source model is proposed for Surface-Volume-Surface Electric Field Integral Equation (SVS-EFIE) which is a new class of single source integral equation (SSIE). The proposed excitation model enables the use of SVS-EFIE for full-wave analysis of interconnects which accurately accounts for the loss in the conductors and allows for rigorous handling of the substrate multilayered medium. The delta-gap source model of SVS-EFIE is derived based on the conventional model that was formulated for the classic surface Electric Field Integral Equation (EFIE). The computation of the network parameters, however, requires computation of the electric fields at the ports volumetric cross-sections. The SVS-EFIE and the proposed source model are discretized using Method of Moments (MoM). Preliminary numerical results are provided for current distribution and the input impedance calculations of a dipole antenna. The input impedance of the dipole antenna computed using proposed excitation model is shown to agree well with that computed using classical surface EFIE provided the latter uses appropriate surface impedance model to account for the conductor loss.