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

Abstract

The invention discloses a low-frequency radiating unit with adjustable impedance and a multi-system antenna. The low-frequency radiating unit includes: a pair of dipoles, and each dipole includes a first radiating arm and a second radiating arm. The fixed end of the radiating arm is provided with a first through hole, and the fixed end of the second radiating arm is provided with a coupling cavity; a balun assembly for supporting a dipole; a feed assembly, which includes a feed sheet and a connector One end of the feed sheet is fixed on the connecting piece and placed in the coupling cavity through the connecting piece, and the other end of the feed sheet is suspended above the first through hole, and the length of the feed sheet extending into the coupling cavity can be and a cable, the cable includes an outer conductor and an inner conductor that are insulated from each other, the outer conductor conducts with the first balun, and the inner conductor conducts with the other end of the feed sheet. The low-frequency radiation unit can reduce the impact on the smart antenna system nested therein. The MISI antenna adopts the above-mentioned low-frequency radiation unit, and has better radiation and circuit performance.

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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