Liquid metal fractal antenna and preparation method and application thereof

A technology of liquid metal and fractal antennas, which is applied in antennas, antenna couplings, antenna components, etc., can solve the problems of non-self-repair, difficulty in preparation of fractal antennas, and inability to bend freely, achieving compact structure, reduced size, and avoiding process and process effects

Inactive Publication Date: 2019-04-26
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention makes full use of the fluidity, conductivity and deformability of liquid metal, and based on the fractal structure formed by excitation, a liquid metal fractal antenna is prepared by one-time molding, which solves the difficulties in the preparation of existing fractal antennas, the inability to self-repair and the inability to bend freely The problem

Method used

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  • Liquid metal fractal antenna and preparation method and application thereof
  • Liquid metal fractal antenna and preparation method and application thereof
  • Liquid metal fractal antenna and preparation method and application thereof

Examples

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Embodiment 1

[0035] The principle of forming a dendritic fractal structure is based on the fingering effect of liquid metal. The principle is as follows figure 1 shown. Hydrogen peroxide is added dropwise on the surface of liquid metal immersed in alkaline solution, affected by oxidative stress, the liquid metal will spread spontaneously and form such figure 2 The dendritic fractal structure shown (the actual fractal graph observed in the experiment).

[0036] Based on the above principles, this embodiment provides a liquid metal fractal antenna, its structure is as follows image 3 As shown, it mainly includes a substrate, an antenna ground plate and a radiation patch; wherein the antenna ground plate and the radiation patch are attached to both sides of the substrate respectively; the antenna ground plate is made of metal materials (such as copper, liquid metal, etc.); the The radiation patch includes a dendritic composite fractal structure formed by liquid metal, which is fixed on th...

Embodiment 2

[0045] Such as Figure 4 As shown, this embodiment provides a method for preparing a liquid metal fractal antenna with a structure as shown in Embodiment 1, which mainly includes the following steps:

[0046] 1) Prepare 0.5mol / L sodium hydroxide solution, 3ml liquid metal (Ga 75.5 In 24.5 ), substrate (glass fiber epoxy resin material, its relative dielectric constant is 8), temperature control platform, packaging film (polydimethylsiloxane) and a hydrogen peroxide solution with a mass concentration of 20%;

[0047] 2) Put the substrate in the sodium hydroxide solution, and then put the liquid metal on the substrate;

[0048] 3) Add 1ml of hydrogen peroxide solution dropwise on the upper surface of the liquid metal;

[0049] 4) Wait for 5 minutes, the liquid metal spreads sufficiently to form a dendritic fractal structure;

[0050] 5) Place the whole device on the prepared temperature control platform, adjust the temperature to 5°C, and keep it for 10 minutes;

[0051] 6)...

Embodiment 3

[0056] A kind of liquid metal fractal antenna, the difference of its preparation method and embodiment 2 is only: the used liquid metal of preparation radiation patch (dendritic compound fractal structure formed by liquid metal) is gallium indium tin eutectic alloy (Ga 67 In 21 sn 12 , melting point is 10.5 ℃), by controlling the amount of materials such as liquid metal metal and hydrogen peroxide, the size of the liquid metal fractal antenna made is 25mm×25mm×5mm, and the structure is more compact.

[0057] Through theoretical calculation and preliminary simulation, the liquid metal fractal antenna prepared in this embodiment can cover the current mobile communication standard communication frequency band (2.555-2.655 GHz), and can work stably. Taking full advantage of the self-similarity and space-filling properties of the fractal structure, the size of the antenna can be reduced, the bandwidth will also be widened, and it has stable physical and chemical properties and str...

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Abstract

The invention relates to a liquid metal fractal antenna and a preparation method and application thereof. The method for conveniently and rapidly preparing the fractal antenna by the aid of the fingering effect, of the liquid metal, excited by the hydrogen peroxide is obtained. The liquid metal fractal antenna comprises a radiation patch which comprises a dendritic composite fractal structure formed by the liquid metal. According to the liquid metal fractal antenna and the preparation method and the application thereof, the fluidity, the electrical conductivity and the deformability of the liquid metal are fully used, the liquid metal fractal antenna is formed and prepared at one time on the basis of the fractal structure formed through excitation, and the problems that the existing fractal antenna is difficult to prepare and cannot be repaired by itself and bent freely are solved.

Description

technical field [0001] The invention relates to the technical field of fractal antennas, in particular to a liquid metal fractal antenna and its preparation method and application. Background technique [0002] Combining fractal theory and antenna technology, fractal antennas came into being. The so-called fractal antenna refers to the antenna with fractal characteristics in geometric properties, which is one of the many applications of fractal electrodynamics. The development of modern communication puts forward higher and higher requirements for the miniaturization and multi-frequency resonance of the antenna. In this case, using fractal curves to build antennas becomes a new strategy. Using the space-filling ability of the fractal structure can increase the electrical length of the antenna, improve the radiation ability of the antenna, and realize the multi-frequency and multi-mode design of the antenna. Because of these advantages, fractal antennas have gained widespr...

Claims

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Application Information

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IPC IPC(8): H01Q1/36H01Q1/48H01Q1/52
CPCH01Q1/364H01Q1/48H01Q1/52
Inventor 陈森刘静
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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