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Apparatus for reinforcing directional radiation of line source

A technology for directional radiation and enhancement devices, applied in directions such as antennas and electrical components, can solve the problems of difficult implementation, increased manufacturing costs, complex antenna geometry, etc., and achieve the effect of convenient operation and simple structure

Inactive Publication Date: 2011-06-15
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Improving the antenna itself will lead to a complex geometric structure of the antenna, making it difficult to realize
However, the antenna array method will make the antenna bulky, and the manufacturing cost will increase significantly.

Method used

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  • Apparatus for reinforcing directional radiation of line source
  • Apparatus for reinforcing directional radiation of line source
  • Apparatus for reinforcing directional radiation of line source

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] The present invention mainly provides a device for enhancing the directional radiation of the antenna, such as figure 1 As shown, a and b are the radii of the inner and outer circles of the cylinder respectively, ρ 0 and φ 0 is the position of the line source, ρ 0 Indicates the position of the coordinate origin from the line source, φ 0 Indicates the angle between the line source and the x-axis. The line source mentioned therein only needs to have the characteristics of two-dimensional radiation. After adopting the device, on the straight line formed by the center of the cylinder and the position of the line source, the radiation is obviously enhanced in the direction where the line source is close to the inner diameter of the cylinder.

[0013] The hollow cylinder of the present invention is made of a left-handed material, and the preferred parameters are: the dielectric constant and the magnetic permeability of the left-handed material are both -1, and the inner c...

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Abstract

The invention discloses a line source directional radiation enhancing device, which comprises a hollow cylinder made by left-handed materials, inside which the line source is arranged and the distance between the line source and the internal wall of the cylinder is adjustable. By using the device of the invention, evident enhancement of radiation occurs on the straight line formed by the circle center of the cylinder and the position where the line source is located and along the direction of the line source near to the internal wall of the cylinder, at the moment, the directionality coefficient can reach about 20, which is much larger than the directionality coefficient 1 when the invention is not adopted. By adopting the method, the structure of the antenna and the array do not need to be modified and the radiation enhancing in a particular direction can be realized; moreover, the device has simple structure and easy operation.

Description

technical field [0001] The invention relates to a line source directional radiation enhancement device for the electronic communication industry. Background technique [0002] Antennas can be seen everywhere in people's daily life, such as mobile phones, satellite navigation, etc. In radio transceiver systems, antennas are important devices that radiate to space or receive electromagnetic waves from space, and are an essential part of radio communication systems. Among them, the directivity of the antenna refers to the ability of the antenna to radiate electromagnetic waves in a certain direction. The directivity is one of the important parameters to measure the quality of the antenna. With the directivity of the antenna, it can be equivalent to improving the transmitter or receiver to a certain extent. The efficiency, and make it have a certain degree of confidentiality and anti-interference. Among them, the radiation directivity coefficient of the antenna is a very import...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/00H01Q15/02
Inventor 朱江伍瑞新
Owner NANJING UNIV