Modal Decomposition of Transient Responses in Wireless Power Transfer System

This work aims at dividing the complicated impulse response (IR) of a wireless power transfer (WPT) system into some simple modal impulse response (MIR). Compared to the disorganized waveforms of the IR, the MIR has simple and clear analytic expressions. Based on the time domain characteristic mode analysis, modal response can be calculated as the inverse Fourier transform of modal admittance of the WPT system. Moreover, the analytic expressions of modal responses are given to explore the factors which dominants the signal transmission performance. The presented modal decompositions can be also applied to arbitrary conductive structure.