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Lens antenna

A lens antenna and lens technology, applied in the electromagnetic field, can solve problems such as poor lens performance, achieve excellent performance and reduce refraction effects

Active Publication Date: 2013-04-10
KUANG CHI INST OF ADVANCED TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a high-performance lens antenna for the defects of the prior art that the above-mentioned refraction, diffraction and reflection are relatively large and the performance of the lens is poor.

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Embodiment Construction

[0029] figure 2 It is a schematic diagram of a lens antenna converging electromagnetic waves according to an embodiment of the present invention, including a lens 10 that can have the function of converging electromagnetic waves and a radiation source 20 disposed on the focal point of the lens 10. The lens 10 is used to convert the electromagnetic waves emitted by the radiation source 20 into plane waves .

[0030] As common knowledge, we know that the refractive index of electromagnetic waves is related to In direct proportion, when a beam of electromagnetic wave propagates from one medium to another medium, the electromagnetic wave will be refracted. When the refractive index distribution inside the material is non-uniform, the electromagnetic wave will be deflected to a position with a relatively large refractive index. Through By designing the electromagnetic parameters of each point in the metamaterial, the refractive index distribution of the metamaterial can be adjus...

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Abstract

The invention relates to a lens antenna which comprises a lens and a radiation source arranged on a lens focus. The lens is divided into a plurality of concentric toruses with lateral surfaces as curved surfaces, and the concentric toruses are attached to one another. The bottom face radius of each torus is smaller than the top face radius. Electromagnetic wave passes through the lens and is irradiated out parallelly on the top face of each torus. Suppose that an included angle between a connecting line of the radiation source and a point on the bottom face of the ith torus and a straight line perpendicular to the lens is theta, the included angle theta corresponds to a unique curved surface in the ith torus, and refractive indexes of all positions on the unique curved surface corresponding to the included angle theta are identical. The refractive index of each torus is gradually reduced along with increasing of the included angle theta. Hopping of the refractive indexes of the lens is designed to be a curved surface, refraction, diffraction and reflection effects at hopping positions are greatly reduced, a problem caused by mutual interference is solved, and the lens antenna has better performance.

Description

technical field [0001] The present invention relates to the field of electromagnetism, and more specifically, relates to a lens antenna. Background technique [0002] In conventional optical devices, a lens can make the spherical wave radiated by a point light source located at the focal point of the lens become a plane wave after being refracted by the lens. At present, the convergence of the lens is realized by the refraction of the spherical shape of the lens, such as figure 1 As shown, the spherical wave emitted by the radiation source 30 is converged by the spherical lens 40 and then emitted as a plane wave. In the process of implementing the present invention, the inventor found that the lens antenna has at least the following technical problems: the spherical lens 40 is bulky and heavy, which is not conducive to the use of miniaturization; Realize the directional propagation of the antenna; the electromagnetic wave reflection interference and loss are relatively ser...

Claims

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Application Information

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IPC IPC(8): H01Q19/06H01Q15/02
Inventor 刘若鹏季春霖岳玉涛
Owner KUANG CHI INST OF ADVANCED TECH
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