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Preparation method for microwave device with gradient refractive indexes based on mixed liquid medium

A gradient-refractive-index, microwave device technology is applied in the field of preparation of gradient-refractive-index microwave devices, which can solve the problems of difficulty in practical application, limited refractive index variation range, complicated manufacturing process, etc. The effect of wide tuning range and wide range of refractive index distribution

Active Publication Date: 2013-03-20
XI AN JIAOTONG UNIV
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Problems solved by technology

It can be made of large-aperture gradient refractive index materials, but it is difficult to control the refractive index and size during production, and the process control requires strict process control and takes a long time.
The ion filling method can obtain large-sized gradient index materials, but the production process is complicated and it is not easy to be practical
[0006] Summarizing the existing preparation process, it can be found that the preparation of gradient index microwave devices mainly faces three difficulties: one is the high production cost and complicated production process, the other is the limited range of refractive index variation, and the third is the electromagnetic wave of the medium used. Large loss

Method used

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  • Preparation method for microwave device with gradient refractive indexes based on mixed liquid medium
  • Preparation method for microwave device with gradient refractive indexes based on mixed liquid medium
  • Preparation method for microwave device with gradient refractive indexes based on mixed liquid medium

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preparation example Construction

[0052] Further, the preparation method of the gradient index microwave device based on the mixed liquid medium comprises the following steps:

[0053] 1) Determine the spatial distribution diagram of the refractive index according to the electromagnetic wave operating frequency band and radiation characteristics of the gradient-refractive-index microwave device, and perform discrete processing on the obtained spatial distribution diagram of the refractive index according to the size of the corresponding discrete unit to obtain each discrete unit layer The equivalent electromagnetic wave refractive index;

[0054] 2) According to the results of discrete processing, using photocuring rapid prototyping technology, using liquid photocuring resin as raw material, adopting layered photocuring method to prepare the resin frame structure of gradient index microwave devices;

[0055] 3) Mix non-magnetic liquids with different electromagnetic wave refractive indices, and obtain mixed li...

Embodiment 1

[0063] A new binary mixed liquid material based on benzene and acetonitrile was prepared, and the mixed liquid medium was used to realize the fabrication of a broadband gradient index plane lens with the function of scanning the electromagnetic beam direction, which specifically includes the following steps:

[0064] 1) Reference image 3 (Where, 1 is the resin frame, 2 is the injected mixed liquid medium), the flat antenna lens is symmetrical about the x-axis, the length of the lens is 250.8mm, the width is 60.8mm, the signal source is placed at a distance of 125.4mm from the lens, and the lens antenna The thickness of the resin frame is 0.3mm, and the working frequency range is 12~18GHz;

[0065] 2) From the lens size in step 1) and the relationship between the phase of the electromagnetic wave and the refractive index in the medium, the distribution equation of the electromagnetic wave refractive index (along the y direction) on the lens plane can be obtained as:

[0066] ...

Embodiment 2

[0075] The design of binary mixed liquid medium of benzene and acetonitrile realizes the fabrication of wide-angle and wide-band planar Lunberg lens, which specifically includes the following steps:

[0076] 1) Reference Figure 4 (wherein, 1 is the resin frame, and 2 is the injected mixed liquid medium). The shape of the new planar Lunberg lens is similar to a planar helmet, and its bottom is a flat plate. Theoretically, when the dielectric constant of the medium is from 17.5 to 1. When the impedance is continuously changed and matched at the edge of the lens, all plane waves of different angles incident on the front will converge on the bottom plate after passing through the lens. The length of the bottom plate of the lens is 107.2mm. The maximum size is 140mm.

[0077] 2) Mix analytically pure (AR) benzene and acetonitrile according to a certain ratio, and perform magnetic stirring in a water bath at 60°C for 15 minutes to make them evenly mixed;

[0078] 3) The dielectri...

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Abstract

The invention discloses a preparation method for a microwave device with gradient refractive indexes based on a mixed liquid medium. The liquid medium is formed by mixing liquids with different dielectric constants; and the electromagnetic wave refractive index of the mixed liquid medium can be controlled by adjusting the mixing proportion of the different liquids. The frame structure of the microwave device is designed according to the requirements; rapid manufacturing of the frame structure of the microwave device is realized by using a rapid prototyping technology; the required microwave device can be obtained by filling the mixed liquid medium with different gradient refractive indexes into the designed frame structure; and the microwave device with controllable properties is obtained by replacing the liquid medium rapidly. The microwave device provided by the invention has the advantages of ultra wideband, low loss, controllable properties, easy preparation, low cost, etc.

Description

technical field [0001] The invention belongs to the field of gradient refractive index materials, and relates to a gradient refractive index material based on a mixed liquid, in particular to a preparation method of a gradient refractive index microwave device based on a mixed liquid. Background technique [0002] Gradient refractive index medium (GRIN) is a kind of material whose refractive index is distributed according to certain rules in the radial direction, the axial direction or the mixed direction of the radial direction. Gradient-index microwave devices refer to devices with special transmission characteristics made of gradient-index media. The use of gradient index devices can greatly simplify the optical system, eliminate phase difference, and reduce weight. It has great potential application prospects in perfect optical imaging, high-gain satellite communication, and information sensing. Since Maxwell first proposed the Maxwell fisheye lens in which the refracti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D11/00
Inventor 田小永李涤尘吴玲玲韩昊雪
Owner XI AN JIAOTONG UNIV
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