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A Feedforward Microwave Antenna

A microwave antenna, feed-forward technology, applied in the direction of antenna, radiating element structure, electrical components, etc., can solve the problems of energy loss, high cost, difficulty in manufacturing large-scale CNC machine tools, etc. Effect

Active Publication Date: 2017-03-22
KUANG CHI INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the existing feed-forward microwave antenna has the following disadvantages: first, the electromagnetic wave reflected from the metal paraboloid will be blocked by the radiation source, resulting in a certain energy loss; second, the metal paraboloid is difficult to manufacture and the cost is high
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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  • A Feedforward Microwave Antenna
  • A Feedforward Microwave Antenna
  • A Feedforward Microwave Antenna

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Embodiment Construction

[0026] 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 feed-forward microwave antenna. The feed-forward microwave antenna comprises a feed source, a metal reflector, a metamaterial and an outer shell. The feed source is fixed on an antenna housing, the metal reflector is arranged opposite to the feed source, the metamaterial is arranged on the inner side surface of the metal reflector, and the antenna housing, the metal reflector and the outer shell form a sealed cavity. The metamaterial comprises a plurality of function metamaterial sheet layers with the same refractive index distribution, and each function metamaterial sheet layer comprises a substrate and a plurality of first artificial metal microstructures periodically laid out on the substrate. Electromagnetic waves radiated by the feed source are modulated by the metamaterial, then reflected by the metal reflector and modulated by the metamaterial again, and the electromagnetic waves penetrate through the antenna housing and are output to the outside in the form of plane waves at last. The feed-forward microwave antenna is prepared according to the metamaterial principle, and therefore the shape of the feed-forward microwave antenna is different from a conventional parabolic shape; in addition, the feed-forward microwave antenna is easy to machine because of a small thickness; meanwhile, the refractive index of the feed-forward microwave antenna is easy to adjust, and therefore various parameters of the feed-forward microwave antenna are also easy to adjust; the effects of ultra-low side lobes, ultra-narrow main lobes, ultra-large front-to-rear ratios of numerical values and the like are achieved.

Description

technical field [0001] The present invention relates to the field of antennas, in particular to a feedforward microwave antenna. Background technique [0002] Existing feed-forward microwave antennas usually consist of a metal paraboloid and a radiation source located at the focus of the metal parabola. The function of the metal parabola is to reflect external electromagnetic waves to the radiation source or to reflect electromagnetic waves emitted by the radiation 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. [0003] However, the existing feed-forward microwave antenna has the following disadvantages: first, the electromagnetic wave reflected from the metal paraboloid will be blocked by the radiation source, resulting in a certain energy loss; second, the metal paraboloid is difficult to manufacture and the cost is high. Metal paraboloi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/00H01Q15/14H01Q1/38
Inventor 刘若鹏季春霖刘斌
Owner KUANG CHI INST OF ADVANCED TECH
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