A dual-polarized two-dimensional multi-beam antenna array

Abstract

The invention discloses a dual-polarized two-dimensional multi-beam antenna array. The antenna array includes an upper dielectric board and a lower dielectric board. The antenna array aperture and horizontal polarization feeding network using differential feeding are located on the upper dielectric board. The vertically polarized feed network is located on the lower dielectric plate, and the horizontally polarized feed network and the vertically polarized feed network are arranged vertically. The excitation ports of the horizontally polarized feed network are horizontally polarized differential excitation pairs, and the vertically polarized feed The excitation port of the network is a vertically polarized differential excitation pair; the antenna array aperture includes a SIW cavity, and 2×2 antenna elements are etched in the SIW cavity. The antenna element is composed of a microstrip patch and a ground via hole that is short-circuited with the lower dielectric plate . The antenna array disclosed in the present invention adopts differential feeding, and the antenna pattern has very low cross-polarization level and port isolation during scanning, so that the polarization diversity performance of the antenna array can be improved and the signal-to-noise ratio of the system can be reduced.

Description

technical field [0001] The invention belongs to the field of wireless communication, in particular to a dual-polarized two-dimensional multi-beam antenna array using differential feeding in the field. Background technique [0002] With the increase of users' demand for wireless communication and the continuous improvement of communication quality requirements, dual-polarized multi-beam antennas have become one of the hotspots in the field of antenna research because of their anti-multipath loss, anti-interference, and increased channel capacity. In the traditional dual-polarized multi-beam array antenna design, because the antenna unit often uses common units, the cross-polarization level of the antenna is very high, and the cross-polarization level will gradually increase with the beam scanning, deteriorating the system performance . Since two-dimensional multi-beam arrays can increase system capacity through space and polarization diversity, which will play a very importa...

AI Technical Summary

Problems solved by technology

In the traditional dual-polarized multi-beam array antenna design, because the antenna unit often uses common units, the cross-polarization level of the antenna is very high, and the cross-polarization level will gradually increase with the beam scanning, deteriorating the system performance

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