Broadband dual-polarized antenna radiation unit and antenna

Abstract

The invention discloses a broadband dual-polarized antenna radiation unit and an antenna using the radiation unit. The radiation unit is arranged on a metal reflector plate to form the antenna and comprises two pairs of dipole radiation units and Baluns corresponding to dipole radiation units; the two pairs of dipoles are in orthogonal polarization arrangement; each dipole comprises two unit arms which are fixedly arranged on a Balun symmetrically; the two unit arms are linear and are symmetrical about the Balun; one end of each unit arm is fixed to the Balun; the two pairs of the dipoles are positioned on the same plane; the other end of each unit arm is bent inwards; and the inwards bent part forms a loading section. Compared with the downwards bent loading section of a broadband dual-polarized antenna radiation unit of the conventional radiation unit, a dual-broadband antenna array can effectively reduce an effect of a broadband dual-polarized antenna radiation unit on a near high frequency band unit, and can more reasonably ensure the independence of various electrical properties of each frequency band in the design of a multi-frequency base station antenna.

Description

[technical field] [0001] The invention relates to the field of mobile communication base station antennas, in particular to a high-performance broadband dual-polarized antenna radiation unit. [technical background] [0002] With the development of mobile communication technology, the requirements for the indicators of dual-polarized base station antennas, especially the gain, bandwidth characteristics, half-power angle fluctuation characteristics with frequency, and cross-polarization characteristics, are increasingly demanding. [0003] The dual-polarized antenna element mainly adopts the following implementation schemes: the first one uses two co-pointed, interleaved and polarized orthogonal dipole antenna oscillator structures; the second one uses a microstrip radiating unit, through Coupled or direct feeding to achieve dual polarization; the third is to use two pairs of dipoles placed orthogonally to form an approximately square layout. [0004] In a commonly used netwo...

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Problems solved by technology

However, this design has the following disadvantages: it contains a large number of components, and the consistency of the vibrator unit is difficult to control when mass-produced; at the same time, the aperture of a single radiation unit is too large, and the mutual coupling between two adjacent units in the array The impact will definitely be strengthened, which is not conducive to improving the overall performance of the array antenna; feeding the dipoles through coupling feeding will easily cause the current imbalance on both sides of the radiation arm of a single dipole, which will eventually affect the entire dipole The radiation pattern of the antenna radiating unit is optimized, so that the pattern after the arrangement of the array has a larger tracking (tracking)

[0007] 1. If the multi-frequency antenna design is implemented in a nested manner, the high-frequency unit located inside the low-frequency vibrator will still be greatly affected by the standing wave and radiation characteristics of the high-frequency unit due to its proximity to the low-frequency balun;

[0008] 2. Although the patent reduces the mutual coupling between vibrators in different frequency bands by converging the radiation aperture, because the loading section is bent downward, the downward loading section still has a great influence on the high-frequency vibrator;

[0009] 3. The patent widens the working bandwidth through cross-sections with different thicknesses, especially at the end, but it also brings disadvantages to the processing and reliability of the vibrator

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