© The Institution of Engineering and Technology
The low-profile reflectarray is proposed in this Letter based on the -negative metamaterial, whose units are mainly designed as two types for aperture phase-tuning. A tri-layer structure is investigated, which is composed of a -negative metamaterial sandwiched by two identical high- dielectric slabs, and features characteristics of high power capacity, energy tunnelling and robustness against the incident angle of the electromagnetic wave. The simulation and experiment sufficiently demonstrated that the structure obtains high transparency rate at a relative bandwidth of 30, as well as a 1-bit phase shift of 0 and 180 is achieved, which makes it potentially high-power microwave spatial phase shifter and the linear-polarisation radiator for reflectarray.
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