A differentially fed dual-polarized dipole component, dipole unit, and dipole antenna

Abstract

A differential feed dual-polarized oscillator assembly comprises a radiator and a pair of balun support arms orthogonally connected to the radiator in a differential double-feed way. The radiator comprises two pairs of oscillator arms orthogonal to each other at 45 degrees and two orthogonal center of the two pairs of oscillator arms is provided with a cross-shaped short circuit plate. The front of each balun support arm is provided with a mirror-symmetrical microstrip balun along the center. The mirror symmetrical microstrip balun forms a group of differential double-feed lines. The back surface of each balun support arm is provided with a mirror-symmetrical grounding metal layer along the center. The oscillator arms and the short circuit plate are supported on the tops of the balun support arms. The oscillator arms are connected to the grounding metal layer. The short circuit plate is connected with the microstrip balun. Differentially doubly-feed is performed on the radiator so that the current distribution on the surface of the oscillator arms tends to be consistent. A directional diagram has good convergence, and high isolation, a high cross-polarization ratio and good impedance bandwidth are obtained. In addition, each pair of differential feed line terminal is subjected to short circuit and two polarized differential feed lines are subjected to crossed short circuit so that two polarization has a high degree of similarity.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a differentially fed dual-polarized dipole assembly, dipole unit and dipole antenna suitable for 5G large-scale arrays. 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. With the development of 5G communication, massive MIMO is one of the key technologies of 5G. Large-scale antenna arrays will significantly improve system capacity, communication rate and bandwidth. However, the use of large-scale antenna arrays, especially in the 5G low-frequency band (such as 3.3-3.6GHz, 4.8-5GHz proposed by the Ministry of Industry and Information Technology), will significantly increase the complexity of the processing...

AI Technical Summary

Problems solved by technology

However, the use of large-scale antenna arrays, especially in 5G low-frequency bands (such as 3.3-3.6GHz, 4.8-5GHz proposed by the Ministry of Industry and Information Technology), will significantly increase the complexity of antenna array processing and assembly

[0003] At present, there are mainly two forms of base station antenna oscillators, die-casting oscillators and PCB oscillators, both of which have their own advantages and disadvantages: die-casting oscillators are integrally formed and have a high degree of integration, but when used in large-scale arrays, the weight of the antenna array is relatively large; PCB The vibrator is relatively light in weight, but requires more assembly processes during antenna assembly, it is difficult to guarantee the consistency of antenna performance, and the production cost is relatively high

Either way, in the application of dual-polarized oscillators, in order to avoid short circuits, there will be a problem of three-dimensional crossing of the feeder balun in space. The more common situation is that one feeder is high and the other is low, so the two poles The impedance matching of the two polarizations is inconsistent, which leads to the current distribution on the two polarization oscillator arms is also inconsistent, and finally leads to the asymmetrical pattern of the two polarizations, and the performance of the two polarizations is quite different.

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