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

Abstract

The invention relates to a metamaterial frequency-selection surface which comprises a metamaterial sheet layer composed of a medium substrate and a structure layer adhered to the medium substrate; the structure layer comprises a plurality of first metal microstructures and second metal microstructures, which are respectively in a rectangular array; the center of each first metal microstructure is a rectangular area formed in the way that four straight-line segments are connected with the centers of the four closest second metal microstructures; each first metal microstructure, as well as each second metal microstructure, comprises three substructures; and each substructure comprises two parallel first metal line segments and a second metal line segment perpendicularly connected between the ends of the two first metal line segments, and the two first metal line segments are respectively connected with the adjacent first metal line segments of the other two substructures. Therefore, the metamaterial frequency-selection surface has excellent electromagnetic performance and frequency-selection performance. The invention further relates to a metamaterial frequency-selection radome and an antenna system both made of the metamaterial frequency-selection 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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