Accurate and Efficient Evaluation of Characteristic Modes

Abstract

A new method to improve the accuracy and efficiency of characteristic mode (CM) decomposition for perfectly conducting bodies is presented. The method uses the expansion of the Green dyadic in spherical vector waves. This expansion is utilized in the method of moments (MoM) solution of the electric field integral equation to factorize the real part of the impedance matrix. The factorization is then employed in the computation of CMs, which improves the accuracy as well as the computational speed. An additional benefit is a rapid computation of far fields. The method can easily be integrated into existing MoM solvers. Several structures are investigated illustrating the improved accuracy and performance of the new method.

11 pages, 12 figures, 4 tables, submitted to TAP

References in corpus (2)

• Minimization of Antenna Quality Factor
• Validating the Characteristic Modes Solvers

Cited by in corpus (8)

• Maximum Gain, Effective Area, and Directivity
• Trade-off Between Antenna Efficiency and Q-Factor
• Upper bounds on absorption and scattering
• Unified Theory of Characteristic Modes: Part I -- Fundamentals
• Computational Aspects of Characteristic Mode Decomposition -- An Overview
• Capacity Bounds and Degrees of Freedom for MIMO Antennas Constrained by Q-Factor
• Physical bounds and radiation modes for MIMO antennas
• A Role of Symmetries in Evaluation of Fundamental Bounds