Tri-polarized vehicle-mounted antenna applied to 5G-V2X Internet of Vehicles communication system

Abstract

The invention provides a tri-polarized vehicle-mounted antenna applied to a 5G-V2X Internet of Vehicles communication system. The tri-polarized vehicle-mounted antenna comprises a circular dielectricplate, a square dielectric plate, a feed structure and eight groups of inverted L-shaped units, the circular dielectric plate is arranged below the square dielectric plate, and an omnidirectional radiation unit is arranged in the middle of the circular dielectric plate and is responsible for 5.85-5.925 GHz direct connection communication frequency bands; the square dielectric plate is located above the omnidirectional radiation unit of the circular dielectric plate. The center of the square dielectric plate and the center of the circular dielectric plate are located on the same vertical centerline, the area of the square dielectric plate is smaller than that of the circular dielectric plate, and a directional radiation unit is arranged on the square dielectric plate and is responsible fordirectional radiation of a wide coverage surface in 3.30-3.60 GHz and 4.80-5.00 GHz frequency bands. The antenna has the characteristics of triple polarization, low cross polarization, high port isolation, directional radiation mode wide beam and omnidirectional radiation mode low out-of-roundness, realizes relatively high gain on an azimuth angle plane, and meets 5G-V2X requirements.

Description

[technical field] [0001] The invention relates to the technical field of 5G antennas, in particular to a three-polarization vehicle-mounted antenna applied to a 5G-V2X vehicle networking communication system. [Background technique] [0002] The rapid development of 5G technology has promoted the further update and upgrade of the Internet of Vehicles, providing the necessary guarantee for the real-time information interaction required by autonomous driving. C-V2X communication technology (V2X: Vehicle-to-everything) includes LTE-V2X and 5G-V2X. At present, LTE-V2X technology is relatively mature, and this technology will be officially commercialized in China in 2020. From the perspective of technological evolution, LTE-V2X supports smooth evolution to 5G-V2X. 5G-V2X will overcome the problem of low latency of LTE-V2X, further improve the reliability of the communication system, and provide the key to solving the safety problems of autonomous driving technology. technical sup...

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Problems solved by technology

But this design is usually cone-shaped radiation, and the radiation beam forms a high elevation angle with the azimuth plane, so that the gain in the azimuth plane is very low

[0004] Considering that the direct communication between vehicles and between vehicles and roadside equipment mainly occurs on the horizontal plane, while the cellular communication mainly occurs between vehicles and distant base stations, if the two communication methods adopt the single omnidirectional radiation mode Or directional radiation mode, not targeted, the utilization rate of power is not high

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