Abstract:
The present invention relates to a wave-absorbing metamaterial, comprising a substrate which is provided with two opposite lateral surfaces, wherein a plurality of periodically arranged artificial metal microstructures are attached on at least one of the two opposite lateral surfaces; when an electromagnetic wave having an incident direction vertical to the two opposite lateral surfaces of the substrate is transmitted to the wave-absorbing metamaterial, a relative permittivity of the metamaterial is substantially equal to a relative magnetic conductivity of the metamaterial. A wave-absorbing principle different from that of a conventional wave-absorbing material is employed on the wave-absorbing metamaterial; an ideal wave-absorbing effect is achieved by periodically arranging various artificial metal microstructures on the substrate and adjusting the artificial metal microstructures; and the wave-absorbing metamaterial has the advantages of minor weight, small thickness and simply adjustable electromagnetic parameters.
Abstract:
The present invention provides an artificial microstructure employed in an artificial electromagnetic material. The artificial microstructure includes a first segment, a second segment, and a third segment. The first segment is parallel to the second segment, and the third segment is connected between the first segment and the second segment. The artificial electromagnetic material has a special electromagnetic effect. The artificial electromagnetic material can be applied to various electromagnetic application systems instead of the typical electromagnetic material.
Abstract:
A front feed microwave antenna, which comprises a radiation source, a first metamaterial panel used for radiating an electromagnetic wave emitted by the radiation source, a second metamaterial panel, and a reflective panel affixed to the back of the first metamaterial panel. The electromagnetic wave is emitted via the first metamaterial panel, refracted by entering the second metamaterial panel, reflected by the reflective panel, and finally re-refracted by reentering the second metamaterial panel, then finally parallel-emitted. Employment of the principle of metamaterial for manufacturing the antenna allows the antenna to break away from restrictions of conventional concave lens shape, convex lens shape, and parabolic shape, thereby allowing the shape of the antenna to be panel-shaped or any shape as desired, while allowing for reduced thickness, reduced size, facilitated processing and manufacturing, reduced costs, and improved gain effect.
Abstract:
The present invention provides an artificial microstructure. The artificial microstructure includes at least three split rings. The at least three split rings surround and embed in turn. Each split ring is formed by a wire which is made of conductive material, with two terminals of the wire towards each other to form an opening of the corresponding split ring. The present invention also provides an artificial electromagnetic material using the artificial microstructure. The artificial electromagnetic material with the artificial microstructure can achieve the function of broadband wave-absorbing.
Abstract:
An artificial electromagnetic material includes at least one material sheet. Each material sheet includes a substrate and a plurality of artificial microstructures attached to the substrate. Each substrate is virtually divided into multiple of substrate units arranged into an array. A pair of artificial microstructures is attached to each substrate. The pair of artificial microstructures includes a first artificial microstructure and a second artificial microstructure with different shapes. The dielectric constant of artificial electromagnetic materials gradually increases from zero in a certain frequency range, therefore the material has a low dielectric constant in the certain frequency range and can meet some needs of special situation.
Abstract:
The present invention provides an artificial microstructure including a first metal wire, a second metal wire parallel to the first metal wire, at least one first metal wire branch and at least one second metal wire branch. The at least one first metal wire branch and the at least one second metal wire branch are distributed in an interlacement arrangement. One end of the at least one first metal wire branch is connected to the first metal wire; the other end is a free end facing towards the second metal wire. One end of the at least one second metal wire branch is connected to the second metal wire, and the other end of the at least one second metal wire is a free end facing towards the first metal wire. The present invention also discloses a metamaterial with the artificial microstructures.
Abstract:
The present invention provides an artificial microstructure employed in an artificial electromagnetic material. The artificial microstructure includes a first segment, a second segment, and a third segment. The first segment is parallel to the second segment, and the third segment is connected between the first segment and the second segment. The artificial electromagnetic material has a special electromagnetic effect. The artificial electromagnetic material can be applied to various electromagnetic application systems instead of the typical electromagnetic material.
Abstract:
The present invention relates to a man-made composite material and a man-made composite material antenna. The man-made composite material is divided into a plurality of regions. An electromagnetic wave is incident on a first surface exits from a second surface of the man-made composite material opposite to the first surface. A line connecting a radiation source to a point on the bottom surface of the ith region and a line perpendicular to the man-made composite material form an angle θ therebetween, which uniquely corresponds to a curved surface in the ith region. A set formed by points on the bottom surface of the ith region that have the same angle θ forms a boundary of the curved surface to which the angle θ uniquely corresponds. The refraction, diffraction and reflection of the present invention at the abrupt transition points can be reduced.
Abstract:
The present invention relates to a metamaterial and a metamaterial antenna. The metamaterial is disposed in a propagation direction of the electromagnetic waves emitted from a radiation source. A line connecting the radiation source to a point on a first surface of the metamaterial and a line perpendicular to the metamaterial form an angle θ therebetween, which uniquely corresponds to a curved surface in the metamaterial. Each point on the curved surface to which the angle θ uniquely corresponds has a same refractive index. Refractive indices of the metamaterial decrease gradually as the angle θ increases. The electromagnetic waves propagating through the metamaterial exits in parallel from a second surface of the metamaterial. The refraction, diffraction and reflection at the abrupt transition points can be significantly reduced in the present disclosure and the problems caused by interferences are eased, which further improves performances of the metamaterial and the metamaterial antenna.
Abstract:
An antenna comprises a medium substrate and grounding units attached on the medium substrate. The antenna further comprises a metal structure attached on the medium substrate. The metal structure comprises an electromagnetic response unit, a metal open ring enclosing the electromagnetic response unit and a feeding point connected to an end of the metal open ring. The electromagnetic response unit comprises an electric-field coupling structure. This design increases the physical length of the antenna equivalently, so an RF antenna operating at an extremely low frequency can be designed within a very small space. This can eliminate the physical limitation imposed by the spatial area when the conventional antenna operates at a low frequency, and satisfy the requirements of miniaturization, a low operating frequency and broadband multi-mode services for the mobile phone antenna. Meanwhile, a solution of a lower cost is provided for design of the antenna of wireless communication apparatuses.