Concept of a Self-Phased Metasurface Pixel/Cell in Non-Reflective Mode

A transmission-type Huygens's metasurface allows electromagnetic waves to be both transmitted and manipulated with negligible reflection. This can be achieved by properly designing electric and magnetic resonances. In this paper, we present concept of a self-phased metasurface pixel/cell that offers a reconfigurable transmissive phase. The tunable phase can be realized by using constituent material as the substrate supporting the metasurface. As the constituent material permittivity changes, the resonance wavelength of metasurface also changes, which results in a phase change. The proposed unit cell design consists of three layers of a metallic ring surrounding a metallic patch, all are integrated in a constituent material used as substrates. Simulation results show that the designed unit cell can achieve over 180 degrees of tunable phase with insertion loss of less than 3 dB.