Planar broadband circularly-polarized antenna with symmetrical beams

Abstract

The invention discloses a planar broadband circularly-polarized antenna with symmetrical beams, which comprises an upper dielectric substrate and a lower dielectric substrate, wherein four circularly-polarized sub arrays with the same structure are arranged in the upper dielectric substrate; and a four-path equal phase difference power divider is arranged on the lower dielectric substrate. The planar circularly-polarized antenna with a low profile and a wide band is designed by using a full printed circuit technology and is applicable to millimeter wave wireless communication and satellite communication represented by fifth generation (5G) mobile communication. The antenna has the characteristics of high precision, good repeatability, low cost and easy mass production.

Description

technical field [0001] The present invention relates to the field of antennas, in particular to a flat plate broadband circularly polarized antenna with symmetrical beams. Background technique [0002] Circularly polarized antennas have the characteristics of anti-multipath interference, anti-cloud and rain attenuation, anti-polarization mismatch, etc., which are not found in other linearly polarized antennas, so they are often used in satellite communications and complex environment communications. With the development of mobile communications, circularly polarized antennas have gradually become one of the important components of MIMO diversity system antennas. With the development of 5G communication technology, millimeter-wave communication has gradually become a hot spot in the market, and the research on related antennas has become more and more extensive. At the same time, with the expectation of 6G and future communication, satellite communication is an important par...

AI Technical Summary

Problems solved by technology

[0006] 3. In the microwave high-frequency band or the millimeter-wave frequency band, there are requirements for miniaturization and portability of the device and the entire system, so the traditional circularly polarized antenna design based on the three-dimensional radiation unit will no longer be used, and the antenna form of the planar structure must be considered

[0007] 4. Traditional substrate-integrated waveguide structure normal radiation antennas, including slot antennas, resonant cavity antennas, etc., do not have broadband radiation characteristics

Combining 3 and 4, it is very difficult to design a substrate-integrated waveguide antenna with planar structure, normal radiation and low loss in the millimeter wave frequency band

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