A dual-polarized base station antenna with high front-to-back ratio

Abstract

The invention discloses a high front-to-back ratio dual polarization base station antenna. The high front-to-back ratio dual polarization base station antenna comprises a U-shaped reflecting plate, wherein a plurality of periodic discretely-arranged radiation units are arranged along the center line of the reflecting plate; an isolation bar is arranged between every two adjacent radiation units; each S-shaped bend is formed between each side of the isolation bar and the corresponding side wall of the reflecting plate; and the two S-shaped bends are symmetrically arranged relative to the center line of the reflecting plate. The high front-to-back ratio dual polarization base station antenna is low in cost and is easy for production and maintenance, and can improve the radiation front-to-back ratio to greater than 30dB without increasing the size of the reflecting plate. And at the same time, the arm width of a radiation arm gradually increases outwardly and the frequency band of the antenna is effectively broadened so that the antenna is high in gain characteristic.

Description

technical field [0001] The invention relates to a base station antenna, in particular to a dual-polarization base station antenna with a high front-to-back ratio for a cellular mobile communication system. Background technique [0002] The antenna is one of the key components of wireless communication. It plays the role of sending and receiving electromagnetic waves in wireless communication and is the air interface of wireless communication. The principle of the antenna radiation signal is to convert the high-frequency oscillating electrical signal into an electromagnetic signal rebroadcast in space; the principle of the antenna receiving the signal is the inverse process of the radiation signal. Without antennas, wireless communication does not exist. [0003] The modern mobile communication system adopts the cellular coverage mode, that is, the entire communication area is divided into several cells, and each cell is an independent communication unit with its own base st...

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Problems solved by technology

Increasing the size of the reflector can effectively reduce the energy of the electromagnetic wave radiated by the vibrator diffracted to the rear of the antenna through the edge of the reflector, thereby improving the front-to-back ratio, but this will increase the space, weight and cost of the antenna; optimize the radiation vibrator, through The change of the form and structure of the vibrator maximizes its orientation, thereby reducing the ratio of the backward energy of the radiation, so as to achieve the purpose of improving the front-to-back ratio, but this will increase the investment and cycle of research and development, and the cost of mass production will also increase. Increase

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