Low-profile broadband high-gain high-aperture-efficiency metasurface antenna

Abstract

The invention discloses a low-profile broadband high-gain high-aperture-efficiency metasurface antenna, and belongs to the technical field of antennas. The antenna sequentially comprises a metasurface structure layer, a first dielectric loading layer, a radiation patch layer, a second dielectric loading layer, a driving patch layer and a feed layer from top to bottom. The metasurface structure is formed by arranging metasurface units according to specific intervals, the whole antenna structure is formed by processing through a multilayer printed board technology, and finally output is conducted through a label SSMP radio frequency connector. The antenna adopts a metasurface loading and microstrip line back-fed structure, so that the antenna obtains better directionality and high gain. Meanwhile, a traditional air loading layer is replaced by medium loading, so that the design and processing difficulty of the metasurface antenna is greatly simplified. According to the invention, the assembling and welding difficulty of the antenna unit in the later period is greatly reduced, and the reliability of the antenna is also improved. The antenna has the advantages of simple structure, high gain, low profile, low processing, assembling and welding difficulty and the like.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a metasurface antenna with low profile, wide band, high gain and high aperture efficiency. Background technique [0002] Aerospace wireless system equipment requires high-quality and high-reliability communication links, which are not only used to achieve safe flight and rapid emergency response, but also provide timely and accurate radar signals for navigation and guidance subsystems. To achieve the above requirements, high-gain airborne antenna is a key component. On the other hand, in order to obtain greater system communication capacity, the antenna usually needs to have broadband working characteristics, and the antenna should meet the characteristics of light weight, small size, easy conformability, and low profile of the airborne at the same time. Generally speaking, there is an unavoidable contradiction between the bandwidth and gain of the antenna and the physical size...

AI Technical Summary

Problems solved by technology

The metasurface has many advantages, but its disadvantages are also obvious. A certain air layer is required between the metasurface and the antenna radiating element to reduce the Q value in order to achieve broadband impedance matching. This will vary in the actual engineering process. Processing, assembly and other issues, such as high frequency, the loading distance between the antenna and the metasurface is difficult to adjust accurately, the feeding structure of the antenna and the welding of the radio frequency connector, etc.

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