A New Cylindrical Lunberg Lens Antenna with Circular Polarization or Dual Circular Polarization

Abstract

The invention discloses a novel circular polarization or double circular polarization cylindrical luneberg lens antenna. The main structure of the present invention comprises a linearly polarized feed antenna 1 attached to the peripheral surface of the cylindrical lens and the polarization direction is at an angle of 45° to the axial direction of the lens (when realizing double circular polarization, it should be replaced with a double linear pole feed) and a dielectric plate waveguide lens 2 with a certain rotationally symmetrical cross-sectional shape to meet the required refractive index and produce a 90° phase difference between the horizontally polarized TE0 wave and the vertically polarized TM0 wave. The present invention has the structural feature of rotational symmetry, so the present invention can also be applied to the usage scenario of multi-beam scanning in azimuth plane. At this time, it is only necessary to arrange the arc-shaped feed array along the circumference of the cylindrical dielectric plate waveguide lens, and adjust the spacing between the arc-shaped feed array elements according to the beam width generated by a single feed, so as to realize uninterrupted beam scanning in the azimuth plane. The invention has simple structure, mature and stable processing technology, and is especially suitable for the millimeter wave frequency band. Based on the basic structure of the present invention, other specific implementations of the present invention can be formed by rationally changing the type of the linearly polarized feed source, the shape of the lens section and the size of the antenna.

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

Images