This work provides a method of wireless power transfer that uses the resonant modes of a metallic cavity to deliver power to a small dipole nearly anywhere within the structure. We derive an expression for the coupling coefficient between the ~E-fields of the cavity mode and the dipole, and then validate the analytic model via finite element simulations. Lastly, we use the results for the coupling coefficient to predict the wireless power transfer efficiency as the dipole is moved throughout the chamber.
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