Novel cylindrical surface luneberg lens antenna capable of realizing circular polarization or bi-circular polarization

Abstract

The invention discloses a novel cylindrical surface luneberg lens antenna capable of realizing circular polarization or bi-circular polarization. The novel cylindrical surface luneberg lens antenna mainly comprises a linear polarization feed source antenna 1 which is attached to the circumferential surface of a cylindrical lens and of which the polarization direction is in a 45-degree angle to the axial direction of the lens (when bi-circular polarization is realized, the linear polarization feed source antenna 1 has to be changed into a bi-linear polarization feed source) , and a dielectric plate waveguide lens 2 which satisfies the required refractive index and allows horizontal polarization TE0 wave and vertical polarization TM0 wave to generate a rotary symmetric profile with a 90 degrees difference. The novel cylindrical surface luneberg lens antenna has a rotary symmetric structure, and is applicable to multi-beam scanning of an azimuth plane. An arc feed source array is only arranged on the circumference of the cylindrical dielectric plate waveguide lens, the distances between elements of the arc feed source array are adjusted according to the widths of the wave beams generated by a single feed source to realize uninterrupted wave beam scanning of the azimuth plane. The novel cylindrical surface luneberg lens antenna is simple in structure, and mature and stable in processing technology and is especially suitable for millimeter wave frequency range. Based on the basic structure of the novel cylindrical surface luneberg lens antenna, the linear polarization feed source types, the lens profile shape and antenna dimension are reasonably changed to from other embodiments of the invention.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to a cylindrical Lunberg lens antenna, specifically a cylindrical Lunberg lens antenna based on a dielectric plate waveguide that can realize circular polarization or double circular polarization, and is suitable for millimeter wave frequency bands Scenarios for multi-beam directional communication and beam scanning. Background technique [0002] With the prosperity of the mobile Internet industry, the rise of the concept of the Internet of Things, and the rapid development of technologies such as satellite communication technology, navigation technology, and radar anti-interference, from the analysis of spectrum resources, the traditional low-frequency spectrum resources have been exhausted and cannot meet the needs of communication capacity. needs, it is necessary to expand high-band applications. At the same time, compared with the linearly polarized antenna, the circularly polar...

AI Technical Summary

Problems solved by technology

After loading the circularly polarized radome, it not only increases the difficulty of antenna processing, but also brings a series of problems such as complex antenna structure, increased loss, and reduced antenna efficiency.

[0005] In view of the phenomenon that the cylindrical Lunberg lens antennas involved in the published patents and papers are mostly linearly polarized, the present invention proposes a new type of circularly polarized or double circularly polarized cylindrical Lunberg lens based on a dielectric plate waveguide Antenna, the cylindrical Lunberg lens antenna can achieve circular polarization or dual circular polarization by using a linearly polarized feed

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