Impedance-adjustable low-frequency radiation unit and multi-system co-body antenna

Abstract

The invention discloses an impedance-adjustable low-frequency radiation unit and a multi-system co-body antenna. The low-frequency radiation unit comprises a pair of dipoles, a balun assembly, a feeding assembly and a cable, wherein each dipole comprises a first radiation arm and a second radiation arm, a first through hole is formed in a fixed end of the first radiation end, a coupling cavity isformed in a fixed end of the second radiation arm, the balun assembly is used for supporting the dipoles, the feeding assembly comprises a feeding piece and a connection piece, one end of the feedingpiece is fixedly arranged on the connection piece and is arranged in the coupling cavity by the connection piece, the other end of the feeding piece is arranged above the first through hole in a suspension way, the length, extending to the coupling cavity, of the feeding piece is adjustable, the cable comprises an outer conductor and an inner conductor which are insulated with each other, the outer conductor communicates with a first balun, and the inner conductor communicates with the other end of the feeding piece. By the low-frequency radiation unit, the influence on an intelligent antennasystem in an embedment sleeve can be reduced. The multi-system co-body antenna employs the low-frequency radiation unit and has better radiation and circuit properties.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to an impedance-adjustable low-frequency radiation unit and a multi-system integration antenna. Background technique [0002] With the increase of mobile communication network standards, in order to optimize resource allocation, save site and antenna resources, reduce the difficulty of property coordination, and reduce investment costs, multi-system antennas with co-site and co-location have gradually become the first choice for operators to build networks . [0003] At present, the multi-system antennas selected by operators usually combine smart antenna systems (1880~1920MHz, 2010~2025MHz, 2575~2635MHz) and base station antenna systems (880~960MHz, 1710~1880MHz) in a radome. integrated. The implementation integration scheme is to nest the base station low-frequency (880-960MHz) radiation unit in the smart antenna array, but the low-frequency radiation unit and the s...

AI Technical Summary

Problems solved by technology

The implementation integration scheme is to nest the base station low-frequency (880-960MHz) radiation unit in the smart antenna array, but the low-frequency radiation unit and the smart antenna array in the base station antenna system nested in the smart antenna array are seriously coupled, which will seriously affect the intelligence. Antenna Array Specifications

[0004] On the other hand, in existing products, different antennas have differences in the shape, size and material of the backplane, sideboard, etc., resulting in differences in the impedance characteristics of the radiating elements in different boundary conditions, which leads to the need for each antenna product Optimize and adjust the impedance characteristics of the radiating unit. There are few existing impedance adjustment methods, which are generally adjusted by re-molding, which greatly reduces the R&D and production efficiency of antenna products.

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