Base station antenna

Abstract

The invention discloses a base station antenna. The base station antenna comprises at least one radiation oscillator and a metamaterial panel, wherein the radiation oscillator is used for generating electromagnetic radiation waves, and the metamaterial panel is used for converging the electromagnetic waves generated by the radiation vibrator and radiating outwards. The metamaterial panel comprises at least one metamaterial sheet layer which comprises a base plate and a plurality of man-made microstructures arranged on the base plate, the refractive indexes of the metamaterial sheet layers are same in distribution; the metamaterial sheet layers are divided into a plurality of areas, the refractive index in each area is reduced gradually along with the increasing of the radius, and the change value ranges of the two refractive indexes in the adjacent areas are crossed. According to the base station antenna, the metamaterial panel is additionally arranged outside the radiation oscillator, the electromagnetic waves are converged by utilizing the refractive index distribution in the metamaterial panel, the widths of the wave sections of the electromagnetic waves are reduced, the whole grain of the base station antenna is improved, the requirement on the special arrangement and the specific size of the radiation oscillator are omitted, the size of the antenna is reduced, and the design and the manufacturing are convenient.

Description

technical field [0001] The invention relates to the field of antennas, and in particular designs a base station antenna. Background technique [0002] Base station antennas are an important part of wireless access in mobile communication systems, and their development is restricted by many factors, especially as mobile communication networks continue to expand in breadth and depth, resulting in increasingly dense base station layouts. This also puts forward higher requirements on the design parameters of the base station antenna, such as the gain, volume, front-to-back ratio, cross-polarization discrimination rate, weight and other related parameters of the base station antenna. [0003] In the base station antenna in the prior art, an antenna vibrator is generally added to the antenna to make the electromagnetic signal received by the antenna stronger. The antenna oscillator has the function of guiding and amplifying electromagnetic waves. Its shape can be rod-shaped or ot...

AI Technical Summary

Problems solved by technology

However, the existing base station antennas of this type have the following two disadvantages: (1) In order to achieve the best effect, the size of the antenna oscillator must correspond to the wavelength of the received or transmitted electromagnetic wave, which is generally 1 / 2 or 4 of the wavelength one

In this way, when the wavelength of the electromagnetic wave is longer or shorter, the antenna oscillator will be too large or too small, which is not conducive to installation and maintenance; (2) the antenna oscillator needs to be arranged in a specific shape combination to achieve beamforming, and the implementation process is complicated and the gain Low and difficult to maintain

(3) The wave lobe radiated by the antenna oscillator is wide, which makes it difficult for the antenna gain of the base station to meet the high-gain system design requirements of modern communications

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