Laminated Hybrid Metamaterial Block for Enhanced Efficiency and SNR in Simultaneous Wireless Power and Signal Transmission System With Dual-Sided LCCL Compensation Networks

Current simultaneous wireless power and signal transmission (SWPST) systems have a rather limited transmission distance because the power transmission efficiency (PTE) and signal transmission gain (STG) decrease rapidly with increasing distance. To address this issue, a novel miniaturized hybrid metamaterial block (HMB) with negative and near-zero permeability is designed based on two types of compact metamaterial stacks. Depending on the magnetic field boundary conditions, the magnetic fields for transmitting power and signal can be more confined between the coupling coils, thus enhancing the PTE and STG. An optimization design method for miniaturizing the metamaterials stacks is presented, achieving enhanced Q factors at low resonant frequencies. Furthermore, a resonant hybridization analysis method is proposed to achieve the target resonant frequencies of the metamaterial stacks and the miniaturization of the overall HMB. Finally, an SWPST prototype with dual-sided LCCL compensation networks is built, demonstrating a 16.3% improvement in the PTE and 11.8-dB enhancement in the STG at a 14-cm distance. The enhancement of the signal-to-noise ratio (SNR) from −6 to 2.2 dB enables data flowing at a 400-kb/s rate to be recovered. These results show that the proposed HMB can simultaneously improve the PTE and SNR over a longer transmission distance.