Local discharge ultrahigh-frequency detection fractal antenna and preparation method thereof

A technology of partial discharge and fractal antenna, which is applied in the direction of antenna, electrical components, and testing dielectric strength, etc. It can solve the problems of narrow detection frequency band, low output impedance, and loss of antenna, and achieve the effect of easy impedance matching and high sensitivity

Inactive Publication Date: 2009-10-14
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the antennas commonly used for on-line partial discharge monitoring of transformers for UHF detection mainly include Archimedes double-arm planar helical antennas, conical antennas, and dipole antennas. Practical application experience shows that the detection frequency band of ex

Method used

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  • Local discharge ultrahigh-frequency detection fractal antenna and preparation method thereof
  • Local discharge ultrahigh-frequency detection fractal antenna and preparation method thereof
  • Local discharge ultrahigh-frequency detection fractal antenna and preparation method thereof

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Embodiment Construction

[0036] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are only for illustrating the present invention, but not for limiting the protection scope of the present invention.

[0037] like Figure 1 to Figure 2 As shown, the present invention includes a dielectric layer 1, a wire layer 2 and a ground layer 4, the wire layer 2 is laid on the surface of the dielectric layer 1, and the ground layer 4 is laid on the lower surface of the dielectric layer 1; the wire layer 2 includes a plurality of end-to-end connected The wire section 22 is bent, and the wire section 22 is set according to Hilbert's fourth-order fractal principle to form a fourth-order radiation antenna element; the coverage of the wire layer 2 on the dielectric layer 1 is a rectangular surface, and the side length of the coverage surface is the side length of the wire layer 2. A...

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Abstract

The invention discloses a local discharge ultrahigh-frequency detection fractal antenna which comprises a dielectric layer and a conductor layer, wherein the conductor layer is laid on the upper surface of the dielectric layer and comprises a plurality of squiggly conductor segments which are connected end to end; the conductor segments are arranged according to the Hilbert fourth-order fractal principle to form a fourth-order radiating antenna element; the covering surface of the conductor layer on the dielectric layer is rectangular; the side length of the covering surface is the side length of the conductor layer; and a feed point is arranged on the conductor segment. The fractal antenna which has the advantages of good directivity, wide frequency bandwidth, low standing wave ratio and convenient impedance matching, can meet the requirement on the on-line monitoring and ultrahigh-frequency detection of the local discharge of a transformer; and in addition, the invention also discloses a preparation method of the local discharge ultrahigh-frequency detection fractal antenna.

Description

technical field [0001] The invention relates to the field of fractal antenna design, in particular to a fractal antenna for partial discharge ultra-high frequency detection and a preparation method thereof. Background technique [0002] The transformer is one of the most critical equipment in the power system. Its normal operation is an important guarantee for the safe, reliable, high-quality and economical operation of the power system. It is necessary to prevent and reduce the occurrence of transformer failures and accidents to the greatest extent. However, due to the long-term operation of transformers, faults and accidents cannot be completely avoided, and there are many reasons for causing faults and accidents. In transformer faults, insulation faults account for a high proportion, and partial discharges will occur before insulation faults occur. Therefore, through online monitoring of transformer partial discharges, latent faults inside the transformer can be found in ...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q13/08G01R31/12
Inventor 李剑杜林王有元廖瑞金陈伟根唐炬张晓星周湶
Owner CHONGQING UNIV
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