14dB Active Gain Magnetic Negative Permeability Metamaterial Cell with Self-coupling Compensation

Metamaterials are an attractive material to obtain electromagnetic properties that cannot be found in nature. While there have been many successful demonstrations of metamaterials, including those with negative permeability that are able to focus magnetoquasistatic waves, such as in wireless power transfer, they have historically suffered from loss. Overcoming this loss aspect of metamaterials is important for making their impact a reality. In this paper, we introduce an active metamaterial cell that achieves 14 dB of gain and stable amplification for applications in emerging metamaterials.