Development of AIM-Based Fast Solver for Efficient Design and Synthesis of Negative Index Materials

摘要

This report presents a fast hybrid volume-surface integral equation approach for the computation of electromagnetic scattering from composite left- handed materials (LHM) such as split-ring resonators (SRR) with wires. The volume electric field integral equation (EFIE) is applied to the dielectric region of this LHM, and the surface electric field integral equation is applied on the conducting surface. The method of moments (MoM) is used to discretize the integral equation into a matrix solution and adaptive integral method (AIM) is employed to reduce the memory requirement and CPU time for the matrix solution. This approach is applied to antenna design to improve the performance of an ordinary microstrip-feed patch antenna. The antenna's bandwidth is greatly broadened while the VSWR remains very low and radiation efficiency is high. The future interesting and practical research is also proposed in the report.