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

Abstract

The invention relates to a metamaterial frequency selective surface, which comprises a metamaterial sheet layer. The metamaterial sheet layer comprises a dielectric substrate and a structural layer which is attached onto the dielectric substrate. The structural layer comprises a plurality of first metal microstructures and second metal microstructures. The first metal microstructures and the second metal microstructures are respectively arranged in a rectangular array. The center of each first metal microstructure is the center of a rectangular area formed by four straight lines which are connected with centers of four closest second metal microstructures. Each of first metal microstructures and second metal microstructures comprises three substructures. Each substructure comprises two parallel first metal wire sections and a second metal wire section which is perpendicularly connected with the two relative ends of the two first metal wire sections. The two first metal wire sections of each substructure are respectively connected with the adjacent first metal wire sections of the other two substructures and have a frequency selective characteristic. The invention additionally relates to a metamaterial frequency selective radome made of the metamaterial frequency selective surface and an antenna system.

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...

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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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