Dual-polarized omnidirectional metasurface antenna

Abstract

The invention belongs to the field of wireless signal transmission technology application, particularly relates to a dual-polarized omnidirectional metasurface antenna, and aims at solving the problem that a traditional micro-strip antenna is narrow in bandwidth and can hardly realize dual-polarization omnidirectional radiation. The metasurface antenna comprises a micro-strip feed structure 5, a lower dielectric substrate 4, a metal grounding plate 3, an upper dielectric substrate 2, a metasurface radiation structure 1 and a coaxial probe feed structure 6 which are sequentially stacked from bottom to top, wherein the metasurface radiation structure is in 90-degree rotational symmetry with the center of the upper dielectric substrate as the rotational symmetry center. The strongest current distribution positions of a horizontal omnidirectional radiation mode and a vertical omnidirectional radiation mode are separated through the structural design of the metasurface radiation structure, and a reasonable feed structure is adopted to ensure that the two polarization modes have the advantages of broadband radiation characteristic and high isolation. Finally, the design of a low-profile dual-polarized omnidirectional metasurface antenna is realized, and the antenna has the characteristics of wide band and high isolation.

Description

technical field [0001] The invention belongs to the application field of wireless signal transmission technology, and relates to a dual-polarized omnidirectional antenna structure, in particular to a dual-polarized omnidirectional metasurface antenna. Background technique [0002] With the rapid development of communication technology in today's society, wireless communication has become an important part of the communication field. As an important transceiver device for wireless communication, antennas have broad application prospects. With the development of information technology, the amount of mobile communication data continues to increase, and indoor base stations have become indispensable equipment for 4G / 5G systems; because omnidirectional antennas have the characteristics of 360° full coverage of indoor signals, they have been widely used in indoor base stations applications; at the same time, dual-polarized antennas can increase channel capacity and are widely used...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a dual-polarization omnidirectional metasurface antenna, in order to solve the problem that traditional microstrip antenna bandwidth is narrow and is difficult to realize dual-polarization omnidirectional radiation; The present invention passes through the structural design of metasurface radiation structure, Separate the strongest current distribution positions of the horizontal omnidirectional radiation mode and the vertical omnidirectional radiation mode, combined with a reasonable feed structure, to ensure that the two polarization modes have the advantages of broadband radiation characteristics and high isolation; finally achieve a low profile Dual-polarized omni-directional metasurface antenna design with broadband and high isolation characteristics

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