Laminated differential broadband base station antenna

Abstract

The invention relates to a laminated differential broadband base station antenna, which comprises an antenna main body, a reflecting plate and a coaxial line, wherein the antenna main body is arrangedabove the reflecting plate through the coaxial line, the antenna main body comprises a radiation unit, a cross-shaped feed structure, a parasitic unit, a first dielectric substrate and a second dielectric substrate, the radiation unit and the cross-shaped feed structure are installed on the lower surface and the upper surface of the first dielectric substrate respectively, the parasitic unit is installed on the lower surface of the second dielectric substrate, the second dielectric substrate is placed above the first dielectric substrate, the radiation unit is composed of four linear radiation arms, and the tail end of each radiation arm of the radiation unit is loaded with an L-shaped branch knot. The structure provided by the invention meets the electrical performance of the antenna, and has excellent radiation performance; and compared with a traditional single-port antenna, the antenna of the invention has the advantages that the anti-interference capability of the antenna is improved by adopting dual-port feeding, and the antenna is made of a PCB and has the advantages of low cost, simplicity in processing and the like.

Description

technical field [0001] The invention relates to a laminated differential broadband base station antenna, which belongs to the technical field of antennas. Background technique [0002] The development of base station antennas is moving towards broadband. The impedance bandwidth of base station antennas is required to cover 1710-2690MHz, and dual-polarized antennas have the advantages of resisting multipath fading while improving antenna capacity. [0003] In addition, the differential signal circuit is widely used in radio frequency circuits due to its characteristics of easy integration, harmonic suppression, low noise and even-mode suppression. Due to the asymmetry of the ports of the traditional dual-port base station antenna, its pattern will be inclined to a certain extent, resulting in the disadvantage of inconsistent cross-polarization ratios of ±60°. Moreover, the single-port antenna cannot be directly integrated into the differential circuit, and the traditional si...

AI Technical Summary

Problems solved by technology

Due to the asymmetry of the ports of the traditional dual-port base station antenna, its pattern will have a certain tilt, resulting in the disadvantage of inconsistent cross-polarization ratio of ±60°

Moreover, the single-port antenna cannot be directly integrated into the differential circuit, and the traditional single-port antenna has poor anti-interference ability. If it needs to be used in the differential circuit, it will not only increase the overall volume but also bring additional workload and insertion loss.

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