Circularly polarized antenna

Abstract

The invention provides a circularly polarized antenna comprising a linearly polarized antenna source, a circularly polarized lens and a medium lens, wherein the linearly polarized antenna source is used for radiating linearly polarized waves; the circularly polarized lens includes a circular polarization device which is located above the linearly polarized antenna source and used for converting the linearly polarized waves into circularly polarized waves, the circular polarization device comprises a plurality of dielectric grids which are vertically and parallelly arranged, the plurality of dielectric grids are arranged in sequence along the horizontal direction at equal intervals; and the medium lens is connected above the circular polarization device and is used for refracting and converging the circularly polarized waves. The antenna can be used for 5G mobile communication, so that the wider axial ratio bandwidth is achieved, meanwhile, the gain of the antenna is improved, moreover,the wave beam scanning of the antenna is realized, and the antenna is suitable for the scene of mobile communication such as the fifth generation in the future.

Description

technical field [0001] The invention relates to the field of wireless mobile communication, in particular to a high-gain circularly polarized antenna. Background technique [0002] The antenna is an energy conversion device for receiving and sending electromagnetic waves in a wireless communication system, and is an indispensable part of a wireless mobile communication system. With the development of wireless mobile communication technology, the requirements for data transmission rate are getting higher and higher. The millimeter wave frequency band has a communication bandwidth of 7GHz without a license, which can greatly increase the rate of wireless communication and realize the instant transmission of large amounts of data. Since the higher the frequency, the greater the loss of the signal during transmission, which puts forward a higher index for the gain of the antenna. On the other hand, in the millimeter wave band, the antenna is small in size and difficult to proc...

AI Technical Summary

Problems solved by technology

However, this technology requires a relatively complex feed network, which is very difficult to implement in the millimeter wave band.

The second method is to use a single feed method, such as a circularly polarized angle-cut patch antenna. This antenna has a simple structure and is easy to implement, but its bandwidth is very narrow and it is not suitable for wide-band applications.

However, the volume of the horn antenna is relatively large and the height is relatively high.

It is not suitable for some application scenarios

Moreover, the methods mentioned above are difficult to realize the function of beam scanning

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