Half-space beam-covered circularly polarized luneberg lens antenna

Abstract

The invention discloses a half-space beam-covered circularly polarized luneberg lens antenna for large-scale multi-beam directional communication and half-space range beam scanning. The basic structure of the antenna consists of a spherical array formed by a plurality of circularly polarized microstrip feed source antennas, a layered dielectric lens processed by the 3D printing technology and a spherical organic glass fixing support. The lens antenna uses small circularly polarized microstrip antennas as feed source antennas which from a feed source array in a hemispherical non-uniform form, the feed source array is embedded in the fixing support made of organic glass, which reduces the aperture occlusion problem during large-area beam scanning, realizes beam scanning in a half-space range, and solves a series of design and processing problems encountered in the process of designing a luneberg lens antenna in the application of half-space beam coverage, contributes to application of the luneberg lens antenna to the usage scenarios and corresponding market requirements of large-scale multi-beam directional communication and half-space range beam scanning.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to a Luneberg lens antenna, specifically a circularly polarized Luneberg lens antenna for multi-beam directional communication and half-space beam coverage of beam scanning, especially suitable for working in large-scale multi-beam Use cases for directional communication and half-space range beam scanning. Background technique [0002] Due to the urgent demand for multi-beam antennas in the fields of ship navigation, satellite communication, electronic countermeasures and target tracking, multi-beam antennas with high gain, narrow beam, low sidelobe, wide scanning angle, high-speed scanning and low manufacturing cost have been adopted. Focus. Based on the above requirements, the present invention designs a circularly polarized Lunberg lens antenna covered by half-space beams, which is especially suitable for use scenarios that work in large-scale multi-beam directional communication...

AI Technical Summary

Problems solved by technology

Japan's Sumitomo Electric Industries Co., Ltd. foams the foamed plastic beads through the mold opening method in the patent CN101057370, but the process flow of this method is very complicated and the foaming uniformity is difficult to control, and the processing conditions are very high, resulting in unreasonable processing costs. Difficulty in control and mass production

American patent inventor Michael.P.Carpenter et al. disclosed in the patent No. US 6433936 B1 titled "Lens of Gradient Dielectric Constant and Methods of Production" that thermoplastic resin expansion beads (polystyrene, polyamide, etc.) were doped with ceramic materials (titanium dioxide, silicon dioxide, etc.) are filled into the mold, and heated to melt them together, and the dielectric constant of each spherical shell is controlled by adjusting the density of the foam molding and the ceramic content. Good practicability, but the process is relatively complicated, not suitable for mass production

DL.Runyon et al. have introduced in detail a kind of special drill bit that utilizes a quadratic curve to open a gradual tapered hole along the radial direction of the dielectric lens in U.S. Patent US 5,677,796 entitled "Luneberg lens and method of constructing same" method, so as to design a Lunberg lens that satisfies the gradual change law of the permittivity of the Lunberg lens. This method is not only difficult to process, but also needs to consider the mechanical strength of the material, so the cost is also high; and because the mass density of the background material is generally high. , the weight problem is prominent for larger Lunberg lenses

In 2017, M. Kamran Saleem and others published a paper entitled "Lens Antenna for Wide AngleBeam Scanning at 79GHz for Automotive Short Range Radar Applications" in IEEE TRANSACTIONS ON ANTENNAS ANDPROPAGATION, VOL.65, NO.4, APRIL 2017. A Lunberg lens antenna that can scan multiple beams from 0° to 170° in the azimuth plane is proposed, but the antenna can only scan the beams in the azimuth plane, and the overall gain is low, and the gain of the edge beams drops seriously, and the gain of the edge beams is only 10dBi

The antenna is also unable to perform beam scanning on the elevation plane, and the phenomenon of beam deformation and gain reduction due to aperture occlusion is still serious, and the beams cannot overlap normally at certain frequency points and angles

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