Metamaterial frequency selective surface and metamaterial frequency selective radome and antenna system made of it

Abstract

The invention relates to a meta-material frequency choosing surface, comprising a meta-material sheet layer, wherein the meta-material sheet layer comprises two substrates and a metal layer located between the two substrates; the metal layer is provided with a plurality of first slots and second slots; the first slots and the second slots are respectively arranged in a rectangular array manner; the center of each first slot serves as the center of a rectangular region which is formed by four straight-line sections which are used for connecting the centers of the second slots which are closest to one another; each first slot comprises three substructures, and each second slot comprises three substructures; each substructure comprises two parallel first straight-line sections and second straight-line sections which are connected with the two ends of the two first straight-line sections; and the two first straight-line sections of each substructure are respectively connected with the adjacent first straight-line sections of the other two substructures, so that the meta-material frequency choosing surface has good electromagnetic performance and frequency choosing property. The invention further relates to a meta-material frequency choosing antenna cover and an antenna system made from the meta-material frequency choosing surface.

Description

technical field [0001] The present invention relates to metamaterials and metamaterial radome and antenna system made therefrom, more specifically, to a novel design metamaterial frequency selective surface and metamaterial frequency selective radome and antenna system made therefrom . Background technique [0002] Metamaterials are artificial composite structural materials with extraordinary physical properties that natural materials do not have. Currently, people periodically arrange artificial microstructures with certain geometric shapes on the substrate to form metamaterials. Since the geometric shape, size and arrangement of the artificial microstructure can be used to change the permittivity and / or magnetic permeability of each point in the metamaterial space, so that it can produce the expected electromagnetic response to control the propagation of electromagnetic waves, therefore, in many This field has broad application prospects, and has become one of the hot fi...

AI Technical Summary

Problems solved by technology

Although this kind of radome can not only protect the antenna from the influence of the harsh external environment, but also cause less loss to the electromagnetic waves transmitted and / or received by the antenna, but because its wave impedance is different from that of the air, the electromagnetic wave between the air and the antenna Reflection will occur when propagating between covers, thereby reducing the radiation efficiency and gain of the antenna, and seriously affecting the electromagnetic performance of the antenna

In addition, the radome is sometimes required to have frequency selection (referred to as "frequency selection") characteristics, while traditional materials are more complicated to manufacture and cost more

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