Dual-polarization dipole unit, antenna and multi-frequency antenna array

Abstract

The invention provides a dual-polarized vibrator unit, an antenna and a multi-frequency antenna array. The dual-polarized vibrator unit includes a radiator and a balun support portion for feeding of the radiator. The radiator includes a dielectric substrate, two pairs of dipole antenna arms being disposed on an upper surface of the dielectric substrate and in orthogonal arrangement of plus or minus 45 degrees, and at least one coupling metal strap disposed on a lower surface of the dielectric substrate. Current induction is generated between the dipole antenna arms and the coupling metal strap so that a current path is formed on the coupling metal strap. The vibrator unit and the antenna thereof in the invention can achieve the ultra-broadband, high gain, high efficiency, high cross polarization ratio and high front-ratio, high isolation, low profile and low coupling and is simple and beautiful in structure, easy in engineering realization and suitable for mass production, the production cost is reduced, and the electrical performance index meets the base station antenna industry standard.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a dual-polarization dipole unit, an antenna and a multi-frequency antenna array. Background technique [0002] The base station antenna is the electrical bridge between the user terminal and the base station in the air in the mobile communication system. It is the most critical component in the entire antenna feeder system. The quality of the base station antenna directly affects the communication quality. [0003] Existing base station antennas are mostly implemented with metal die-casting vibrators, which require a complex feed network, such as four coaxial cables for feed, and the implementation form and assembly process are complicated. Even if the broadband antenna realized by the PCB printing process, it is difficult to realize the wideband (690-960MHz or 1700-2700MHz) condition under the structure form of low profile (the height between the antenna and the reflector is le...

AI Technical Summary

Problems solved by technology

[0003] Existing base station antennas are mostly implemented with metal die-casting vibrators, which require a complex feed network, such as the need to use 4 coaxial cables to achieve feed, and the implementation form and assembly process are complex

Even if the broadband antenna realized by the PCB printing process, it is difficult to realize the wideband (690-960MHz or 1700-2700MHz) condition under the structure form of low profile (the height between the antenna and the reflector is less than 0.125 wavelengths), and the electrical performance index Meets the requirements of the base station antenna industry standard

In addition, in the multi-frequency antenna, there is obvious mutual coupling between the high and low frequency antennas, which causes the distortion of the pattern of the respective working frequency bands

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