Hybrid dielectric antenna capable of realizing axial directional beam and radial multi-beam radiation

Abstract

The invention belongs to the technical field of antennas and provides a multifunctional hybrid dielectric antenna. The antenna comprises a hybrid dielectric plate with a hollow center, a metal flat plate, a monopole antenna and a rectangular waveguide. The hybrid dielectric plate with the hollow center is composed of a central cylindrical gap periodic cylindrical through holes and anisotropic square dielectric units for loading metal wires. The diameters of the cylindrical through holes are gradually increased from the center to the outside on the mixed dielectric plate. The metal flat plate is loaded on the lower surface of the hybrid dielectric plate. The monopole antenna is fixed in the center of the hybrid dielectric plate. The rectangular waveguide is fixed in the axial focus positionof the integral hybrid dielectric plate through a bracket. According to the invention, axial high-gain directional radiation and radial multi-beam radiation functions can be achieved at the same time, and the antenna can be applied to the fields of satellite communication and the like.

Description

Technical field [0001] The present invention belongs to the technical field of antennas, and relates to a mixed medium antenna, in particular to a multifunctional antenna based on a mixed medium plate, which can be applied to the fields of satellite communication and mobile communication. [0002] technical background [0003] With the rapid development of satellite communications and mobile communications, people have increasingly urgent requirements for the integrated design of multi-functional dielectric antennas. However, in the current design and research of dielectric antennas, most of them use the same type of dielectric characteristics to achieve the corresponding electromagnetic radiation function. Therefore, the function of the general dielectric antenna is relatively single, while the mixed dielectric antenna can achieve more functions. The use of a gradient gradient medium layer to achieve a mixed medium of directional beams is also suitable for using the zero refractiv...

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Problems solved by technology

However, in the current design and research of dielectric antennas, most of the same type of dielectric properties are used to achieve the corresponding electromagnetic radiation function. Therefore, the general dielectric antenna has a single function, and the mixed dielectric antenna can achieve more functions. For example, the design can Mixed media that use graded media layers to achieve directional beams are also suitable for wavefront shaping using the zero-refractive-index property of mixed media

[0004] For example, the application publication number is CN108767424A, and the patent application titled "a multi-layer dielectric antenna realizing side-fire and end-fire functions" discloses a multi-layer dielectric antenna realizing side-fire and end-fire functions, including Concentric circular multi-layer dielectric plate and feed source composed of phase compensation dielectric plate and end-fire phase calibration dielectric plate; edge-fire phase compensation dielectric plate is nested by circular and multiple ring-shaped dielectric plates; end-fire phase calibration dielectric plate It is a ring-shaped structure nested in the outermost layer of the side-fire phase compensation dielectric plate, which is embedded with an end-fire gain calibration module composed of multiple dielectric blocks, and a metal plate is printed on the lower surface of the concentric circular multi-layer dielectric plate , the feed source includes 1 rectangular waveguide and 3 microstrip antennas; the rectangular waveguide is at the axial focus of the broadside phase compensation plate; the microstrip antenna is at the radial focus of the broadside phase compensation plate, and the antenna is mixed The phase compensation of the medium in different directions ensures the directional beam in the side-fire direction and realizes the directional beam in the end-fire direction at the same time. The feed source in the side-fire direction is a rectangular waveguide, and the feed source in the end-fire direction is a microstrip antenna. However, a circular The ring dielectric nested plate structure is difficult to process, there are many feed sources, and the feed network is complex

[0005] Although the above mixed-medium antennas can realize multiple functions at the same time, their structure and feed network are complex, difficult to process, many types of materials are required, and the combination is not firm, which is not conducive to practical use, and it is difficult to meet the requirements of satellite communication and mobile communication for axially directional beams. Requirements for the simultaneous use of the radial multi-beam radiation function

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