Subwavelength imaging designed with meander-line anisotropic epsilon-near-zero (AENZ) metamaterial structures

Subwavelength imaging is designed and demonstrated utilizing practical meander-line metamaterial structures in this work. By carefully designing the composite structure, desirable anisotropic epsilon-near-zero (AENZ) index is obtained. To verify the imaging performance, a 3D model is constructed which is composed of period meander-line elements in numerical validation. Imaging in super resolution is observed. We remark that in the model, both of natural material loss and finite element size effect are considered mimicking practical scenarios. The demonstration results are convincing and helpful to provide practical insights for future applications of subwavelength imaging in microwave frequency range.