Antenna based on metamaterials
A metamaterial and antenna technology, applied in antennas, electrical components, etc., can solve problems such as electromagnetic energy reduction, electromagnetic wave reflection interference, and electromagnetic energy loss, so as to avoid the reduction of electromagnetic energy, improve antenna performance, and improve convergence performance.
Active Publication Date: 2013-09-04
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; Realize the directional propagation of the antenna; the electromagnetic wave reflection interference and loss are relatively serious, and the electromagnetic energy is reduced
Due to the reflection of part of the electromagnetic wave, the electromagnetic energy along the propagation direction will be correspondingly lost, which seriously affects the distance of electromagnetic signal propagation and the quality of the transmitted signal.
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[0024] Metamaterials are a new type of material with artificial microstructures 302 as basic units and spatially arranged in a specific manner, with special electromagnetic response, including artificial microstructures 302 and a substrate 301 on which the artificial microstructures are attached. The artificial microstructure 302 is a planar structure or a three-dimensional structure composed of at least one metal wire. A plurality of artificial microstructures 302 are arranged in an array on a substrate 301, and each artificial microstructure 302 and the substrate 301 to which it is attached occupies It is a metamaterial unit. The substrate 301 can be any material different from the artificial microstructure 302. The superposition of these two materials makes each metamaterial unit produce an equivalent dielectric constant and magnetic permeability. These two physical parameters correspond to the metamaterial unit's Electric field response and magnetic field response. The cha...
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A metamaterial-based antenna and a metamaterial plate, said antenna comprising: a radiation source and a metamaterial plate having an electromagnetic wave-converging function and being used for converting the electromagnetic waves emitted by the radiation source to plane waves; the metamaterial plate includes a plurality of core layers and a plurality of gradient layers symmetrically distributed on the two sides of the core layers, with each core layer and each gradient layer including a sheet substrate and a plurality of artificial micro-structures arranged thereon. By means of design of the refractive index variation both on and between the core layers and the gradient layers of the metamaterial plate, the electromagnetic waves emitted by the radiation source are converted into plane waves, thus improving the converging performance of the antenna, greatly reducing reflection loss and thus avoiding reduction of electromagnetic energy, enhancing transmission distance and improving antenna performance.
Description
Technical field [0001] The present invention relates to the field of antennas, and more specifically, to antennas based on metamaterials. Background technique [0002] In conventional optical devices, a lens can be used to make the spherical wave radiated from 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. The lens converges the electromagnetic waves radiated by the radiator through the lens and then emits the antenna. 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 the fo...
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IPC IPC(8): H01Q19/06H01Q15/02
CPCH01Q15/0086H01Q15/02H01Q19/06H01Q15/0006H01Q15/0026
Inventor 刘若鹏季春霖岳玉涛
Owner KUANG CHI INST OF ADVANCED TECH