Metamaterial-based antenna
A metamaterial and antenna technology, applied in antennas, electrical components and other directions, can solve the problems of large size, high processing precision and high cost of spherical lens 40, and achieve the effects of convenient and flexible design, small size and simple manufacturing process
Active Publication Date: 2013-07-03
KUANG CHI INST OF ADVANCED TECH +1
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Problems solved by technology
In the process of implementing the present invention, the inventor found that the lens antenna has at least the following technical problems: the spherical lens 40 is bulky and heavy, which is not conducive to the use of miniaturization; and the spherical lens 40 has a great dependence on the shape, which needs to be more precise. The directional propagation of the antenna can be realized, so the requirements for processing accuracy are relatively high, and the cost is relatively high
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[0015] A metamaterial is a new type of material with artificial microstructures 2 as the basic unit, which is spatially arranged in a specific way and has a special electromagnetic response, including artificial microstructures 2 and a substrate 1 for the artificial microstructures to attach to. The artificial microstructure 2 is a planar structure or a three-dimensional structure composed of at least one metal wire. A plurality of artificial microstructures 2 are arranged in an array on the substrate 1. The portion occupied by each artificial microstructure 2 and the substrate 1 attached to it is is a metamaterial unit. The substrate 1 can be any material different from the artificial microstructure 2. The superposition of these two materials makes each metamaterial unit produce an equivalent permittivity and permeability. These two physical parameters correspond to the metamaterial unit’s Electric field response and magnetic field response. The characteristics of the metama...
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A metamaterial-based antenna of an embodiment of the invention comprises a metamaterial panel with an electromagnetic wave converging function and a signal source on the focus of the metamaterial panel. The metamaterial panel comprises a circular zone and a plurality of annular zones concentric with the circular zone, wherein the refractive index in the circular zone and the annular zones continuously reduces as a radius increases, and is the same at the parts with the same radius, at least two adjacent zones (a first zone and a second zone) are provided in the plurality of zones, the refractive index in the first zone continuously reduces from n1 to n2 as the radius increases, the refractive index in the second zone continuously reduces from n3 to n4 as the radius increases, and n3 is greater than n2. The antenna converts an electromagnetic wave signal diverged in the form of spherical waves into an electromagnetic wave signal capable of being transmitted in long distance in the formof plane waves, has a small size and a simple fabrication process, and is convenient and flexible to design and suitable for large-scale production.
Description
technical field [0001] The invention relates to the field of antennas, in particular to an antenna based on metamaterials. Background technique [0002] In conventional optical devices, a lens can make the spherical wave radiated by a point light source located at the focal point of the lens become a plane wave after being refracted by the lens. The lens antenna is composed of a lens and a radiator placed on the focal point of the lens. Using the characteristics of lens convergence, the electromagnetic wave radiated by the radiator is converged by the lens and then emitted. This antenna has strong directivity. [0003] At present, the convergence of the lens is realized by the refraction of the spherical shape of the lens, such as figure 1 As shown, the spherical wave emitted by the radiator 30 is converged by the spherical lens 40 and then emitted as a plane wave. In the process of implementing the present invention, the inventor found that the lens antenna has at least t...
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IPC IPC(8): H01Q19/06H01Q15/00H01Q15/02
Inventor 刘若鹏岳玉涛季春霖
Owner KUANG CHI INST OF ADVANCED TECH