Metamaterial-based high-performance miniaturized circularly polarized antenna

Abstract

The invention discloses a metamaterial-based high-performance miniaturized circularly polarized antenna. The antenna comprises a floor, a feeding interface, a supporting column arranged in the middleof the floor, and coaxial multi-stage antenna pieces connected to the supporting column; the first-stage antenna piece in the coaxial multi-stage antenna pieces is close to the floor, and is fixed with the floor through a connecting assembly, and the rest of the antenna pieces in different stages are gradually away from the floor and are sequentially reduced; and the feeding interface is fixed inthe floor, and the inner core of the feeding interface penetrates through the floor and is connected to the first-stage antenna piece. Through the coaxial multi-stage patches, electromagnetic radiation is generated, and the bandwidth and the radiation direction of the antenna are effectively improved, so that the gain is improved, and the size of the antenna is reduced.

Description

technical field [0001] The invention relates to the field of communication antennas, in particular to a high-performance miniaturized circular pole antenna based on metamaterials. Background technique [0002] In radar, communication and other systems, the antenna plays the role of transmitting or receiving electromagnetic waves, which has a great influence on the overall performance of the system. Circularly polarized antennas can transmit and receive circularly polarized waves, and have the advantages of small polarization deflection loss and anti-multipath interference. Therefore, it has been widely used in many aspects such as radar, remote sensing, and communication. [0003] At present, the commonly used circularly polarized antennas mainly include orthogonal dipole pair circularly polarized antennas, microstrip circularly polarized antennas, helical antennas, and dipole-type traveling wave circularly polarized antennas. [0004] Orthogonal dipole pair circularly pol...

AI Technical Summary

Problems solved by technology

This type of antenna is limited by the dipole structure and the placement of the reflective floor, and has the disadvantages of large antenna size and difficulty in miniaturization.

[0009] As far as the commonly used microstrip circularly polarized antenna is concerned, due to the limitations of the structure and radiation principle of the microstrip antenna, there are shortcomings such as narrow antenna bandwidth; The bandwidth is often narrower, and the dielectric loss introduced at the same time will reduce the antenna gain; for the microstrip circular polarization scheme of double-feed and multi-feed points, it is necessary to build a feed network, which has disadvantages such as large size

[0010] As far as the commonly used helical antenna is concerned, the helical antenna is limited by the mechanism of circular polarization, and has disadvantages such as large volume; at the same time, it is not easy to precisely process the structure

[0011] As far as the published dipole type traveling wave circularly polarized antenna is concerned, the antenna is designed on the basis of dipole antenna and helical antenna, and for directional radiation, it is also necessary to set a larger metal floor, so there are disadvantages such as large antenna size and difficulty in miniaturization

[0012] In summary, currently commonly used orthogonal dipole pair antennas are limited by their own performance and the principle of circular polarization, and have disadvantages such as large physical size and difficulty in miniaturization; microstrip circularly polarized antennas are limited by microstrip antennas. Radiation principle, there are disadvantages such as narrow antenna working bandwidth and sharp drop in performance after miniaturization design; helical antenna, which relies on axial working mode, has disadvantages such as large volume and difficult processing; dipole type traveling wave circularly polarized antenna , limited by the working principle, there are also disadvantages such as difficulty in miniaturization

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