Base station antenna for 2G/3G frequency band based on electromagnetic band gap reflection base plate

Abstract

The invention discloses a base station antenna applied in 2G / 3G frequency band based on an electromagnetic band gap reflection base plate, comprising a radiation unit and a reflection plate; the radiation unit comprises two pairs of square dipoles which are in crossed symmetrical arrangement; two pairs of alternated square dipoles are equipped with feed cards; inverse L-shaped feed probes are arranged on the feed cards; baluns are connected to the centers of the lower sides of the two pairs of square dipoles ; the baluns are connected and fixed at the center of an FR4 media base plate; an electromagnetic band gap unit is arranged at one side of the FR4 media base plate; the other side is an earth plate; the electromagnetic band gap unit is composed of metal patches; the metal patches are connected with the earth plate through conductive through holes arranged at the centers; the working frequency of the 2G / 3G base station antenna is fully covered; the electromagnetic band gap is taken as the reflection base plate of the base station antenna; the backward radiation of the base station antenna is reduced by using the particular forbidden band feature and high impedance feature of the structure; and the integrated weight of the antenna is reduced.

Description

technical field [0001] The invention relates to a base station antenna for 2G / 3G frequency bands based on an electromagnetic bandgap reflection base plate. Background technique [0002] Today, due to the simultaneous existence of multiple communication standards, the location of base station antennas is becoming more and more difficult. Dual-polarized antenna is a combined antenna technology. It uses the characteristics of the incoherence of the vertical polarization of electromagnetic waves and the multipath of radio wave transmission in mobile communication systems, and combines the two polarized directions of +45° and -45°. Antennas that are handed over and work in duplex mode at the same time. Therefore, its most prominent advantage is to save the number of antennas for a single directional base station; the use of dual-polarized antennas can also reduce the mechanical load, facilitate the installation of the antenna, save valuable sky resources, thereby saving infrastr...

AI Technical Summary

Problems solved by technology

[0003] Usually, the reflective base plate of the base station antenna adopts a metal aluminum plate. At this time, the backward radiation of the antenna is often large, which is undesirable because it will cause mutual interference; and the use of a metal aluminum plate as a reflective base plate is also It will cause the overall weight of the antenna to be too large, which will lead to a corresponding increase in the installation difficulty and cost of the base station antenna

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