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An ab-initio analysis based on coupled mode theory (CMT) is applied todescribe the interaction dynamics of high dielectric resonators (DRs) with itscontaining aqueous solution. We prove that the coupling mechanism isreciprocal. Such property is exploited to find closed form and accurateexpressions of the coupling coefficient, the main factor characterizing thesystem performance. Based on such expressions, it is shown that, for wirelesspower transfer (WPT) applications, up sizing the DRs relaxes the need of usingultra high dielectric constant materials. The nature of interaction is capturedby the coupling matrix, which shows that the behaviour of the system isidentical to the ones studied extensively in the literature when the containedaqueous solution is replaced by an enclosing cavity. It follows, as in atypical three coupled resonators setting, that when two DRs are inserted in theaqueous solution a non-bonding mode emerges; hence enabling efficient wirelesspower transfer (WPT) via the opening of an electromagnetic induced transparencylike window. Due to the inevitable situations where the DRs are notsymmetrically placed inside the solution, the general eigenvalue problem, withasymmetrically placed DR inserts is solved and the eigenvectors representingthe coupled modes are depicted by vectors in a 3D mathematical space where theuncoupled modes represent its basis. Moreover, the strong coupling between theDR inserts and the aqueous medium allows the proposed WPT system to tolerateintrinsic aqueous solution losses and the presence of extraneous objects.Additionally, the value of the load at maximum efficiency is independent of theaqueous solution loss tangent, thus tolerating the variation of the mediumsalinity. The Proposed EIT like scheme can find applications for mid/shortrange power transfer in/through swimming pools, chemical reactors, fish tanks,etc.

Analysis of a Wireless Power Transfer System Based on the Interaction of  Very High Permittivity Dielectric Resonators with a Contained Aqueous  Solution