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Directional antenna

A directional antenna, antenna 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: 2015-03-11
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.

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with relevant drawings and specific embodiments:

[0028] see figure 1 , the directional antenna includes a feed source 100 , a metamaterial unit 200 , a first reflection unit 300 and a second reflection unit 400 . The electromagnetic wave radiated by the feed source 100 is refracted by the metamaterial unit 200 and then scattered on the first reflection unit 300. The first reflection unit 300 reflects the scattered electromagnetic wave and is refracted by the metamaterial unit 200 to scatter and emit. The second reflection unit 400 It is used to reflect the scattered electromagnetic waves and propagate them in parallel.

[0029] In this embodiment, the feed source 100 and the first reflection unit 300 are respectively disposed on two sides of the metamaterial unit 200 , and the metamaterial unit 200 is attached to the first reflection unit 300 . The second reflection unit 400 is disposed on one side...

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Abstract

The invention relates to 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 sheet-shaped base material and a plurality of holes arranged on the sheet-shaped base material; the electromagnetic wave radiated 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 refracted to scatter out through the meta-material unit; the second reflector unit is used for reflecting the scattered electromagnetic wave to enable the electromagnetic wave to spread in parallel. Through the scattering manner, the electromagnetic wave passes across the feed source and is projected on the second reflector unit; the second reflector unit reflects the electromagnetic wave to generate planar electromagnetic wave, thereby greatly relieving the interference of the feed source and a bracket 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): H01Q19/06H01Q19/19H01Q15/02
Inventor 刘若鹏徐冠雄杨松涛石小红
Owner KUANG CHI INST OF ADVANCED TECH
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