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Abstract:
We derive an analytical framework for analyzing the coil power efficiency impact of resonant inductive decoupling (RID) for arbitrary channel coils. It is applied to a two-channel array, and analytical expressions for load power deposition dependent on the resistive coupling factor, degree of coupling compensation and relative driving phase shift between elements are derived. The results show that coil performance can be enhanced or degraded by RID, depending on the exact coil application scenario, and great care needs to be taken in a practical setup.