Antenna radiation unit, feeding method and antenna system

Abstract

An antenna radiation unit, a feeding method and an antenna system are provided. Said antenna radiation unit comprises a dipole, a reflecting board, and a printed integrated circuit board (PCB) feed unit for feeding the dipole. The dipole includes an outer conductor of the dipole balun and an inner conductor of the dipole balun, and the PCB feed unit includes a PCB strip line and a PCB ground layer. Wherein the PCB feed unit is situated on the side of the reflecting board where the dipole is disposed; the PCB strip line is electrically connected with the inner conductor of the dipole balun; the PCB ground layer is coupled with the reflecting board and grounded; and the bottom of the outer conductor of the dipole balun and the reflecting board are grounded with direct current. Said antenna radiation unit, feeding method and antenna system can ensure the passive intermodulation (PIM) reliability of the connecting parts of the dipole and the feeding network in the antenna; and it also ensures the PIM long-term reliability of the connecting parts of the dipole and the feeding network in the antenna.

Description

technical field [0001] The invention relates to an antenna radiation unit, in particular to an antenna radiation unit, a feeding method and an antenna system. Background technique [0002] In mobile communication base station antennas, electric dipoles and patches are usually used as the radiation unit of the antenna. In particular, because the molded electric dipole has better radiation performance and bandwidth than other electric dipoles, more and more are selected as the radiation element of the antenna. [0003] Usually, in the base station antenna, an electric dipole with orthogonal polarization (such as + / -45° polarization) is used as the radiation unit, and the feed network in the form of electric dipole and coaxial cable is connected by welding, such as figure 1 Shown is a schematic diagram of the connection between the electric dipole and the coaxial cable feed network, wherein the electric dipole arm 1 is connected to the outer conductor 2 of the electric dipole ...

AI Technical Summary

Problems solved by technology

[0004] The inventors of the present invention have found that if the electric dipole and the coaxial cable are connected by welding, the outer conductor of the coaxial cable will dissipate heat quickly, which will make the welding operation difficult when welding the coaxial cable and the electric dipole. And it is difficult to control the welding quality, which in turn leads to a reduction in the reliability of passive intermodulation (PIM) at the welded part of the electric dipole balun outer conductor 2 in the antenna and the outer conductor 5 of the coaxial cable

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