Coupled Characteristic Mode Splitting Analysis

This manuscript focuses on mode splitting phenomena in the context of the theory of coupled characteristic modes (TCCM). Unlike the conventional approach of temporal coupled mode theory or wave-guide mode theory, it utilizes the full-wave method of moments impedance matrix to understand the mode coupling mechanisms. It investigates the underlying mathematical mechanisms to generate the cross-over of the coupled eigenvalues. It also provides a closed-form solution of the eigenvalue perturbation. Numerical experiments have been reported with an array of dipoles. The proposed modal analysis of generalized eigen mode splitting will be useful in applications like antenna shape synthesis, mutual coupling control, bandwidth enhancement, etc.