Meta-material for realizing electromagnetic wave omnibearing radiation
A technology of metamaterials and electromagnetic waves, applied in the field of metamaterials, can solve the problems of unfavorable miniaturization, large size of diverging antennas, difficult flexible design, etc., and achieve the effect of convenient and flexible use, simple manufacturing process and low cost
Active Publication Date: 2014-12-24
KUANG CHI INST OF ADVANCED TECH +1
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Problems solved by technology
[0004] The prior art realizes the divergence of electromagnetic waves by using divergent antennas. In the process of implementing the present invention, the inventor found that the divergent antennas of the prior art have at least the following technical problems: the divergent antennas are not only large in size but also heavy, which is not conducive to small It also has a great dependence on the shape, and it is difficult to design flexibly; the loss is large, the medium is easy to age, and the cost is high.
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[0015] Metamaterial is a new type of material with artificial microstructure as the basic unit, which is spatially arranged in a specific way and has special electromagnetic response, including artificial microstructure and substrate 1 for the artificial microstructure to attach to. The artificial microstructure is a planar or three-dimensional structure composed of at least one metal wire. Multiple artificial microstructures are arrayed on the substrate 1. Each artificial microstructure and the part of the substrate 1 it is attached to constitute a superstructure. material unit. The substrate 1 can be any material different from the artificial microstructure. The superposition of these two materials makes each metamaterial unit produce an equivalent permittivity and permeability. These two physical parameters correspond to the electric field of the metamaterial unit respectively. response and magnetic field response. The characteristics of the electromagnetic response of met...
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An embodiment of the invention relates to a meta-material for realizing electromagnetic wave omnibearing radiation. The meta-material is provided with two tightly joint meta-material panels which has an electromagnetic wave diverging function, and refractive index distribution of the two meta-material panels is different. Refractive index on an incident plane of the meta-material panel is distributed in an annular structure, and the refractive index at a same radius is the same. The meta-material panel comprises a circular area and a plurality of annular areas. In each area, the refractive index increases continuously with increase of the radius, and two adjacent areas exist, wherein the maximum refractive index of an area which is close to a center of a circle is larger than the minimum refractive index of the other area. On a junction of the two meta-material panels, transmitted electromagnetic wave has the same energy with reflected electromagnetic wave. The meta-material can modulates radiation angles of an electromagnetic wave source so as to realize 360 degrees omnibearing electromagnetic wave radiation. The meta-material has relatively small volume, light weight, and is convenient and flexible in use, low in cost, simple in manufacturing process and can be applied in mass production.
Description
technical field [0001] The invention relates to the field of metamaterials, in particular to a metamaterial capable of realizing omni-directional radiation of electromagnetic waves. Background technique [0002] A metamaterial is a new type of material consisting of a substrate and multiple artificial microstructures attached to the surface of the substrate or embedded inside the substrate. The substrate plays a supporting role for the artificial microstructure, which can be any material different from the artificial microstructure. The superposition of these two materials will produce an equivalent dielectric constant and magnetic permeability in space. By designing each metamaterial Based on the shape and arrangement of artificial microstructures, the equivalent permittivity and equivalent permeability of each point in the metamaterial can be designed. [0003] The refractive index of electromagnetic waves is related to the dielectric constant and magnetic permeability of...
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IPC IPC(8): H01Q15/00
Inventor 刘若鹏岳玉涛季春霖
Owner KUANG CHI INST OF ADVANCED TECH