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Radar antenna

A radar antenna, plane technology, applied in the direction of antenna, electrical components, etc., can solve the problems of complex production process of parabolic antenna, and achieve the effect of eliminating complex manufacturing process and simple structure

Active Publication Date: 2015-02-04
KUANG CHI INST OF ADVANCED TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to propose a radar antenna with a simple structure in view of the complex production process of the parabolic antenna in the prior art.

Method used

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Embodiment Construction

[0033] This embodiment utilizes the convergence characteristics of the planar metamaterial panel that can converge electromagnetic waves, replaces the current parabolic reflector with a planar reflector, and solves the problem of complex production process of the radar antenna parabolic reflector, and the original parabolic reflector antenna can be directional The advantages of receiving or transmitting electromagnetic waves.

[0034] The convergence characteristics of the metamaterial used in this embodiment are as follows figure 2 As shown, when the electromagnetic wave is emitted from the feed source 1 located at the focal point of the metamaterial, it becomes a plane wave after being refracted by the planar metamaterial panel 4. The optical path in this process is reversible, that is, when the plane electromagnetic wave irradiates the planar metamaterial panel 4 After its refraction, electromagnetic waves will converge on feed 1.

[0035] The refractive index distribution of t...

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Abstract

The invention relates to a radar antenna. The radar antenna comprises a feed source, a support and a plane metamaterial panel which is positioned on the support and has a converging function, wherein the feed source is positioned on a focus behind the plane metamaterial panel; and after being refracted by the plane metamaterial panel, electromagnetic waves emitted by the feed source are emitted out in parallel, and the traditional parabolic reflection surface is replaced with the plane metamaterial panel, so that the electromagnetic waves can be received or emitted directionally. By using the radar antenna with the plane structure, the complicated process for manufacturing the traditional parabolic radar antenna is eliminated, and the feed source is positioned behind the plane metamaterial panel, so that the defect that the feed source is positioned in front of a paraboloid and blocks a part of the electromagnetic waves emitted by the feed source, when the parabolic radar antenna is used is overcome.

Description

Technical field [0001] The invention relates to the field of radar antennas, and more specifically, to a radar antenna using metamaterials. Background technique [0002] The radar antenna transforms the spherical wave radiated by the feed source into a plane wave through a reflector, thereby achieving directional reception or emission of electromagnetic waves. The reflector currently used is a parabolic shape, and the feed source is located near the focal point of the reflector. [0003] The working principle of the radar antenna is similar to that of the optical reflector. The existing radar parabolic antenna is like figure 1 As shown, it includes a crash source 1, a parabolic reflector 2 and a bracket 3. At the focal point of the parabolic reflector 2, a feed source 1 that emits or receives electromagnetic waves is placed. Using the focusing characteristics of the parabolic reflector 2, the feed source 1 emits The spherical wave is transformed into a plane wave after being reflec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q19/185H01Q15/14
Inventor 刘若鹏石小红徐冠雄张洋洋
Owner KUANG CHI INST OF ADVANCED TECH