A Midfield Wireless Energy Transmission Antenna Based on Metamaterial for Implanted Capsule Endoscope

Aiming at the wireless power transmission (WPT) problem of capsule endoscope, a 1.4GHz wireless power transmission antenna is proposed. Because of the negative permittivity and permeability of metamaterials, a split resonant ring (SRR) structure is designed to enhance the characteristics of energy convergence antenna and improve the efficiency of energy transmission. The antenna size is 28.5mm ×13mm×0.085mm. The performance of the antenna in three-layer structure simulation is analyzed. Experiment results proved that the antenna has good transmission effect under the safety standard. By comparing the simulation results with the measured results, the good consistency between them is verified.