Abstract
The resolution limitation is a main problem in the time-reversed field shaping system. In this paper, a subwavelength field shaping approach is proposed by combining time reversal (TR) technique and defective resonant metasurfaces. The subwavelength 2D and 3D field patterns can be effectively realized in both single-target and multi-target field-shaping systems. The resolution in both single-target and multi-target field-shaping systems aided with defective metasurfaces is approximately $0.1~\lambda $ , which is corresponding to the dimension of the applied metasurface cell. The proposed technique can be used for wireless power transfer, industrial heating, and localized wireless communications.
Highlights
Time reversal (TR) waves can self-adaptively focus to a speckle through complex media without transmission matrix measurement [1]–[3]
The defective metasurface is surrounded by 8 time reversal mirror (TRM) dipole antennas with a distance of 5 λ to demonstrate the TR far-field focusing performance, which λ is the free-space wavelength corresponding to 3.55 GHz
The resolution of TR field shaping patterns can be effectively increased by using defective metasurfaces in single-target and multi-target field shaping systems
Summary
Time reversal (TR) waves can self-adaptively focus to a speckle through complex media without transmission matrix measurement [1]–[3].
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