Dual-polarization high-gain directional antenna and design method therefor

Abstract

The invention discloses a dual-polarization high-gain directional antenna and a design method therefor. The antenna comprises a group of positive 45-degree polarization high-gain antenna array which mainly consists of at least four positive 45-degree polarization antenna subunits; a group of negative 45-degree polarization high-gain antenna array which mainly consists of at least four negative 45-degree polarization antenna subunits; and a reflection plate, two opposite sides of which are respectively provided with two groups of antenna arrays so as to achieve the directional radiation of the antenna. The antenna subunits of the two groups of antenna arrays are orthogonal to each other, and are intersected mutually. Moreover, the distances between the central points of the subunits are greater than the half of the wavelength corresponding to the minimum frequency point of a frequency band designed for the antenna. The antenna can greatly improve the coverage and transmission of a wireless network signal, and especially greatly improves the coverage effect and long-distance bridge transmission performance of a 5GHz signal in a large region. The invention also discloses a design method for the antenna.

Description

technical field [0001] The invention relates to an antenna in the technical field of wireless communication, in particular to a dual-polarized high-gain directional antenna and a design method thereof. Background technique [0002] In recent years, the rapid development of wireless network technology has been leapfrogging, and the devices supporting wireless connection are increasing rapidly. People's demand for high-speed Internet surfing through wireless network access has also shown explosive growth. Rapidly increasing, and the demand for long-distance wireless bridging of the same wireless network and long-distance wireless communication of multiple wireless networks in the wireless coverage network is also increasing. The frequencies used by wireless network signals are mainly 2.4GHz and 5GHz. The attenuation of electromagnetic waves at these two frequencies in the air is relatively large, especially the attenuation decibels per unit length of 5GHz signals is particular...

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Problems solved by technology

The existing 5GHz dual-polarized high-gain 16dBi antenna is widely used. The traditional design generally adopts two different feed-in modes of one-point-eight-equal-power-splitting feed networks for antenna arrays in the same group of eight-element antenna arrays. It is realized by power feeding. Since the same group of antenna unit arrays will cause relatively poor isolation between the two interfaces of the antenna, its own interference will be large, and the one-to-eight equal power distribution feed network is a three-level power division circuit, and its path loss is also Relatively large, so the measured gain of the antenna designed in this way is only 14dBi and the radiation efficiency is also poor

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