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Directional antenna

A directional antenna and metamaterial technology, applied in the direction of antennas, electrical components, etc., can solve the problem of difficult to transform the influence of antenna radiation, and achieve the effect of eliminating the influence

Active Publication Date: 2015-04-15
KUANG CHI INST OF ADVANCED TECH
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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 provide a scattering-type directional antenna that is easy to modify, simple, easy to implement and low in cost in view of the defect that the feed source and its supporting rods in the prior art have a relatively difficult effect on antenna radiation.

Method used

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with relevant drawings and specific embodiments:

[0039] see figure 1 , the directional antenna includes a feed 10 , a metamaterial unit 20 , a first reflection unit 30 and a second reflection unit 40 . The electromagnetic wave radiated by the feed source 10 is refracted by the metamaterial unit 20 and scattered on the first reflection unit 30. The first reflection unit 30 reflects the scattered electromagnetic wave and is refracted by the metamaterial unit 20 again to scatter it out. The second reflection unit 40 It is used to reflect the scattered electromagnetic waves and propagate them in parallel.

[0040] In this embodiment, the feed source 10 and the first reflection unit 30 are respectively disposed on two sides of the metamaterial unit 20 , and the metamaterial unit 20 is attached to the first reflection unit 30 . The second reflection unit 40 is disposed on one side of the feed source 10 s...

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Abstract

The invention discloses a directional antenna. The directional antenna comprises a feed source, a meta-material unit, a tabulate first reflector unit and a tabulate second reflector unit, wherein the meta-material unit comprises at least one meta-material layer; the meta-material layer comprises a plurality of sub units; the sub units comprise a first material and a second material embedded in the first material; electromagnetic wave radiant from the feed source is refracted by the meta-material unit and then scattered on the first reflector unit; the scattered electromagnetic wave is reflected by the first reflector unit and then scattered by the meta-material unit after being refracted again; the second reflector unit is used for reflecting the scattered out electromagnetic wave to enable the scattered out electromagnetic wave to spread in parallel. The electromagnetic wave steers clear of the feed source in a scattered manner, and is projected on the second projector unit; the second projector unit reflects the electromagnetic wave to generate planar electromagnetic wave, thereby greatly relieving the interference of the feed source on the antenna radiation.

Description

technical field [0001] The invention relates to the field of antennas, in particular to a metamaterial directional antenna. Background technique [0002] At present, the feedforward main reflector antenna in the radar is a directional antenna whose main reflector is a paraboloid, and the feed source is located near its focus, which can convert the spherical wave radiated by the feed source into a plane wave. [0003] Its working principle is similar to that of an optical mirror, utilizing the focusing properties of a parabolic primary reflector. The spherical wave emitted by the feed source is transformed into a plane wave after being reflected by the parabola, forming a narrow beam with the strongest radiation along the parabolic axis. It is a parallel beam that enables the antenna to transmit in a directional manner, which is difficult for other shaped antennas. [0004] In the prior art, since the feed source and its supporting rods are blocked in front of the main refl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/00H01Q15/23H01Q19/06H01Q19/18
Inventor 刘若鹏徐冠雄杨松涛石小红
Owner KUANG CHI INST OF ADVANCED TECH
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