Controlling Electromagnetic Fields Using Active Metasurfaces And Their Applications

In recent years,as the the efficiently controlling in terms of the amplitude and phase based on the transmission/reflection electromagnetic wave and the low loss and low cost advantage,the meta-surface has demonstrated the broad applications prospect in the field of communications and microwave electromagnetic field.Intergeating the active devices into the meta-surface with great capacities to improve the flexibility of controlling electromagnetic fields and broaden the application fields.Based on the functions,this paper mainly aimed at analysising and researching the regulation of the amplitude and phase for the reflector/transmission,and the mutual conversion between the transmitted electromagnetic wave and the reflected electromagnetic wave,including the following aspects:1.Based on the research and analysis the controlling electromagnetic wave from the metasurface,we firstly designed two meta-corners based on the generalized Snell's laws,while analyzed and verified the performance of controlling the phase of electromagnetic waves.Meanwhile,we researched the controlling the polarization of electromagnetic wave,respectively,from the anisotropic material and the data analysis.In the end,we researched the controlling electromagnetic wave under the different polarizations for the active metasurface,respectively,from the equivalent circuit and the simulations2.We achieved the controlling electromagnetic phase and amplitude by active device,respectively,from the proposed the active reflecting meta-surfaces and the active transmitting metasurface,and achieved multi-corner reflectors anf lenses by combining different phase distributions based on the generalized Snell's laws,and further analysised the applications of the active metasurfaces in the high directional beam radiations from the far-fields.3.We proposed two active meta-surface functioning as intergeating reflecting and transmitting into an unit.We achieved the conversion between the main polarized reflecting wave and the main polarized transmitted wave in the y direction by adjusting the voltage value of the active patch meta-surface,and we achieved the conversion between the mainly polarized reflecting wave in the y direction and the cross polarized reflecting wave in the x direction by adjusting the active aperture meta-surface,and we researched the electromagnetic wave performance under the oblique incident waves for these two kinds of active meta-surface...