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Partial feedback microwave antenna system

A technology of microwave antenna and horn antenna, applied in antennas, electrical components, etc., can solve the problems of high cost and difficulty in manufacturing large-scale CNC machine tools, and achieve the effect of improving the overall gain, the far-field maximum value and the half-power bandwidth.

Active Publication Date: 2013-09-11
KUANG CHI INST OF ADVANCED TECH
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  • Abstract
  • Description
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Problems solved by technology

This method cuts very accurately, but it is difficult to manufacture such a large CNC machine tool, and the cost is relatively high

Method used

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Embodiment Construction

[0030] Light, as a kind of electromagnetic wave, when it passes through glass, because the wavelength of light is much larger than the size of atoms, we can use the overall parameters of the glass, such as the refractive index, rather than the detailed parameters of the atoms that make up the glass to describe The response of glass to light. Correspondingly, when studying the response of materials to other electromagnetic waves, the response of any structure in the material whose scale is much smaller than the wavelength of the electromagnetic wave to electromagnetic waves can also be described by the overall parameters of the material, such as the dielectric constant ε and magnetic permeability μ. By designing the structure of each point of the material, the dielectric constant and magnetic permeability of each point of the material are the same or different, so that the overall dielectric constant and magnetic permeability of the material are arranged in a certain order, and ...

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Abstract

The invention discloses a partial feedback microwave antenna system composed of metamaterial, a feedback source located below the metamaterial and a reflecting device, wherein the reflecting device is placed on a horizontal line in an inclined mode, the inclination angle between the reflecting device and the horizontal line is theta, the metamaterial is composed of metamaterial sheet layers from the first layer to the Nth layer and a reflecting plate tightly attached to the metamaterial sheet layer of the Nth layer, each layer of metamaterial sheet layer comprises a substrate and a plurality of artificial metal micro structures arranged on the substrate according to periods, electromagnetic waves radiated by the feedback source are reflected to the metamaterial by the reflecting device, and the metamaterial radiates the electromagnetic waves out in a plane wave mode. Due to the fact that the metamaterial is adopted for the partial feedback microwave antenna system to modulate the electromagnetic waves, the electromagnetic waves are made to be radiated out in the plane electromagnetic wave mode, and therefore overall gains of the antenna system are improved. Meanwhile, according to the microwave antenna system, the position of the feedback source, the position of the conical reflecting body, and the position of the metamaterial are reasonably arranged, and therefore the maximum valve of a far field of the microwave antenna system and the half-power bandwidth are very good in performance.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a bias feed microwave antenna system. Background technique [0002] A conventional microwave antenna is generally composed of a metal parabola and a feed source located at the focus of the metal parabola. The role of the metal parabola is to reflect external electromagnetic waves to the feed source or to reflect electromagnetic waves emitted by the feed source. The area of ​​the metal paraboloid and the machining accuracy of the metal paraboloid directly determine the parameters of the microwave antenna, such as gain and directivity. Because the installation position of the feed source of the existing offset-feed microwave antenna is not on a straight line perpendicular to the center section of the antenna and passing through the center of the antenna, the conventional offset-feed microwave antenna does not have the influence of the shadow of the feed source. Howe...

Claims

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Application Information

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IPC IPC(8): H01Q19/185H01Q19/06H01Q15/23
Inventor 刘若鹏季春霖岳玉涛李云龙
Owner KUANG CHI INST OF ADVANCED TECH
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