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A miniature LS Peano fractal antenna for partial-discharge ultrahigh-frequency detection

A fractal antenna and partial discharge technology, applied in the field of antennas, can solve the problems of standing wave ratio not less than 2, large volume, narrow detection frequency band, etc., to achieve the effect of simple antenna production, easy impedance matching, and small size

Active Publication Date: 2017-09-01
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing partial discharge detection antenna has disadvantages such as large volume, narrow detection frequency band and standing wave ratio not less than 2

Method used

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  • A miniature LS Peano fractal antenna for partial-discharge ultrahigh-frequency detection
  • A miniature LS Peano fractal antenna for partial-discharge ultrahigh-frequency detection
  • A miniature LS Peano fractal antenna for partial-discharge ultrahigh-frequency detection

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Effect test

Embodiment 1

[0031] LS Peano fractal curve is also a kind of plane filled Peano fractal curve. figure 1 and figure 2 They are the schematic diagrams of the first and second-order miniature LS Peano fractal curves. In the high-order fractal curve formed by the wire layer of the miniature LS Peano fractal antenna, the two sides that appear in pairs are parallel wires, such as image 3 As shown by the thin solid line in , the side connecting the parallel wires is the short-circuit terminal, such as image 3 As shown by the thick solid line in , the edges connecting the fractal elements into a complete curve are additional wire segments, such as image 3 shown by the dotted line in . In the miniature LS Peano fractal antenna, the parallel wires and the short-circuit terminal are both equal in length, and the length of the additional wire is the length of the parallel wire times, its structure is more compact, and it is easy to make a smaller antenna. Therefore, setting the parameters of ...

Embodiment 2

[0052] A design method for the miniature LS Peano fractal antenna described in technical scheme one, comprising the following steps:

[0053] Step 1: Determine the number t of parallel conductors m, short-circuit terminal n and additional conductors;

[0054] Step 2: Determine the resonant frequency f of the tiny LS Peano fractal antenna:

[0055]

[0056] Among them, c 0 is the speed of light in vacuum, β is the phase constant, β=2π / λ, m is the number of parallel double wires, s is the total length of the wire segment, k∈{0,R+}; d is the length of the parallel wire;

[0057] Step 3: For different values ​​of d, calculate the resonant frequency f of the antenna respectively, and then determine the optimum value of the length of the parallel wires according to the available range of the resonant frequency f;

[0058] Step 4: Make the LS Peano fractal antenna according to the optimal value of the parallel wire length.

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Abstract

The invention discloses a miniature LS Peano fractal antenna for partial-discharge ultrahigh-frequency detection and a design method. The LS Peano fractal antenna includes a dielectric substrate and a ground plate and a LS Peano fractal conductive wire layer respectively laid on both sides of the dielectric substrate. Conductive wires in the conductive wire layer include parallel conductive wires, short circuit terminal conductive wires and additional conductive wires. The lengths of the parallel conductive wires are equal to the lengths of the short circuit terminal conductive wires. The lengths of the additional conductive wires are square-root-of-2 times of the parallel conductive wires. The lengths of the parallel conductive wires are determined by the resonant frequency of the antenna. In the invention, the LS Peano fractal antenna is used as a signal sensor, and the antenna has the characteristics of a good direction, a wire frequency band and being convenient for impedance matching in the range of 300MHz to 3GHz and can meet the design requirements for the sensor by the partial discharge ultrahigh-frequency detection of the electrical equipment. The antenna is simple to manufacture, and enables measurement equipment to be saved. In addition, the antenna is small in size and convenient for installation in the electrical equipment, thereby raising the sensitivity and anti-interference capability of the equipment.

Description

technical field [0001] The invention relates to a micro-antenna for partial discharge ultra-high frequency detection, in particular to a miniature LS Peano fractal antenna for partial discharge ultra-high frequency detection, which belongs to the technical field of antennas. Background technique [0002] The faults of electrical equipment are mainly insulation faults, and the important form of insulation faults is partial discharge. Partial discharge refers to the discharge phenomenon that occurs in a local area in the insulation structure of electrical equipment. The development and severity of partial discharge can be detected by detecting the physical quantities of sound, light, electricity, heat and other physical and chemical phenomena accompanying partial discharge. The detection methods can be roughly divided into electric quantity detection method and non-electric quantity detection method. In the power detection method, since the partial discharge pulse width can r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/1227
Inventor 王永强张斌刘晗
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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