A Metamaterial Inspired Button Antenna for Wireless Power and Data Transfer

Abstract

A novel metamaterial inspired button antenna topology is proposed, integrating two working modes to transfer power and data, respectively. An omni-directional radiation is obtained in the 3.5 GHz WiMAX band to support on-body communication, while a circular polarized broadside radiation is achieved in the 5 GHz WLAN band to harvest power. An Artificial Magnetic Conductor (AMC) metamaterial structure is used to achieve a low-profile design. A wide bandwidth and high efficiency are observed. All these features make the proposed antenna suitable for on-body data transmission and off-body energy harvesting. A prototype has been fabricated. The measurement results are in good agreement with the simulation results.