Converging device of vortex electromagnetic waves

Abstract

The invention provides a converging device of vortex electromagnetic waves. The converging device comprises an electromagnetic metasurface and a vortex electromagnetic wave generating device; the electromagnetic metasurface comprises five dielectric plates which are sequentially stacked and do not contact each other; the central positions of the upper surfaces of the first dielectric plate, the second dielectric plate, the fourth dielectric plate and the fifth dielectric plate are printed with periodically-arranged M*N square metal patches, wherein M is larger than or equal to 2, and N is larger than or equal to 2; and the upper surface of the third dielectric plate is printed with metal patches with periodically-arranged M*N rectangular slits which are formed through etching; the dielectric plates are fixed through a bracket; the vortex electromagnetic wave generating device is fixed on the central axis of the sides of the dielectric plates on the electromagnetic metasurface, the metal patches being printed on the sides of the dielectric plates; vortex electromagnetic waves generated by the vortex electromagnetic wave generating device enjoy phase compensation by means of equivalent capacitance and inductance generated by mutual resonance between the unit metal patches of the electromagnetic metasurface, so that a plane phase can simulate a spherical phase, and therefore, theconvergence characteristic of the vortex electromagnetic waves can be completed.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a vortex electromagnetic wave converging device, which can be applied in the field of wireless communication. technical background [0002] Due to its unique properties, vortex electromagnetic waves are widely used in many fields, but the application in the field of communication is still in its infancy. On June 24, 2011, Professor Bo Thide's research team conducted a remarkable experiment in the lagoon of Venice, Italy, proving that the capacity of wireless communication can be greatly improved by using the orbital angular momentum of electromagnetic waves, that is, by distorting electromagnetic waves. Under normal circumstances, only one channel of information can be transmitted on the same frequency. Here, by encoding different orbital angular momentums of electromagnetic waves, they can transmit multiple information at the same frequency (actually a frequency ba...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art, and propose a converging device for vortex electromagnetic waves, which solves the complex structure and large volume of the converging device in the prior art on the basis of converging vortex electromagnetic waves question

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