# Wireless Power Transfer via Dielectric Loaded Multi-moded Split Cavity Resonator

## TL;DR

This paper introduces a novel wireless power transfer method using a dielectric loaded multi-moded split cavity resonator, enabling enhanced control over transfer impedance and achieving high efficiency over practical distances.

## Contribution

It presents a new dielectric resonator-based scheme that improves transfer efficiency and bandwidth compared to traditional inductive coupling methods.

## Key findings

- Achieved 70% efficiency at 7 cm transfer distance.
- Enhanced system figure of merit with dielectric resonators.
- Maintained over 40% efficiency across a wide bandwidth.

## Abstract

Wireless power transfer via a dielectric loaded multi-moded split cavity resonator (SCR) is proposed. Unlike conventional inductive resonant coupling, the scheme enables the control of both the real and imaginary parts of the transfer impedance. It is demonstrated through measurements that the inclusion of dielectric resonators (DRs) tuned to the SCR $TE_{012}$ mode, significantly enhances the system figure of merit and optimal efficiency. The effect of the DRs is shown to be related to the resonant coupling of the DRs $TE_{01\delta}$ and SCR modes, resulting in an electromagnetic induced transparency-like window. An efficiency of 70% is achieved when the transfer distance is 7 cm, or half wavelength. Additionally, it was shown that the efficiency is above 40% over a relatively wide bandwidth and a wide range of optimum load impedance.