Characteristic Mode Simulation of General Composite Material Bodies

Abstract

Modal analysis of general material bodies is very useful for designing novel material antennas, such as dielectric resonator antennas. Theory of characteristic modes (TCM) can be used to carry out mode analysis of material bodies with clear physical meaning. This paper focuses on how to apply two proposed finite element-boundary integral (FE-BI) formulations to determine the characteristic modes of general composite material bodies. Two FE-BI based generalized Hermitian eigenvalue (GHE) equations are examined through the simulation of the characteristic modes of material bodies. Numerical results show that the FE-BI based GHE equations are accurate for the solution of characteristic modes for general composite material bodies and the results obtained can be adopted as benchmark for the development of other modal analysis methods.