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Temperature-adjusting negative magnetic permeability element based on liquid crystal and preparation method thereof

A negative permeability, liquid crystal technology, applied in waveguide devices, instruments, resonators, etc., can solve the problems of time-consuming and labor-intensive, and achieve the effect of dynamically adjustable operating frequency

Inactive Publication Date: 2011-05-18
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, this solution is passive, time-consuming and labor-intensive

Method used

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  • Temperature-adjusting negative magnetic permeability element based on liquid crystal and preparation method thereof
  • Temperature-adjusting negative magnetic permeability element based on liquid crystal and preparation method thereof
  • Temperature-adjusting negative magnetic permeability element based on liquid crystal and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1: Using circuit board printing technology to etch a rectangular metal sheet 5 array on one side of a copper clad laminate 1 with a thickness of 1.00mm, the size of the metal sheet 5 is: W=4.00mm, L=9.00mm, Px=11.00mm , Py=6.00mm. Positioning holes 4 with a diameter of 1.00 mm are machined at the four corners of the copper clad laminate 1 . An epoxy glass plate with a thickness of 0.50 mm and the same size as the copper clad laminate 1 is selected, and a U-shaped bead 2 with a side width of 5.00 mm and a positioning hole 4 is prepared by using a numerical control machine tool. A polyimide liquid crystal aligning agent is coated on the side of the copper clad plate 1 with a metal sheet array by the spin coating method, and a film is formed by thermal curing by a stepwise heating method, and the polyimide film is oriented and rubbed with a dust-free cloth to obtain A polyimide liquid crystal alignment layer that aligns liquid crystal molecules vertically.

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Embodiment 2

[0052] Example 2: An array of rectangular metal sheets 5 is prepared on a copper clad laminate 1 with a thickness of 1.00mm by using circuit board printing technology. The size of the metal sheets is: W=3.00mm, L=8.00mm, Px=12.00mm, Py=5.00 mm, while machining positioning holes 4 with a diameter of 1.00 mm at the four corners of the copper clad laminate 1 . Select an epoxy glass plate with a thickness of 0.40 mm and the same size as the copper-clad laminate 1, and use a CNC machine tool to prepare a U-shaped bead 2 with a side width of 5.00 mm, and machine the four corners of the U-shaped bead 2 into a positioning plate with a diameter of 1.00 mm. hole. A polyimide liquid crystal aligning agent is coated on the side of the copper-clad laminate 1 with a metal sheet array by the spin coating method, and a film is formed by thermal curing by a stepwise heating method, and the polyimide film is oriented and rubbed with a dust-free cloth to obtain A polyimide liquid crystal alignm...

Embodiment 3

[0056] Embodiment 3: An array of circular metal sheets 5 is prepared on a copper clad laminate 1 with a thickness of 1.00 mm by circuit board printing technology, and positioning holes 4 with a diameter of 1.00 mm are machined at the four corners of the copper clad laminate 1 . The dimensions of the circular metal sheet 5 are: R=3.50mm, Px=11.00mm, Py=11.00mm. An epoxy glass plate with a thickness of 0.60 mm and the same size as the copper clad laminate 1 is selected, and a U-shaped bead 2 with a side width of 5.00 mm and a positioning hole 4 is prepared by using a numerical control machine tool. A polyimide liquid crystal aligning agent is coated on the side of the copper clad plate 1 with a metal sheet array by the spin coating method, and a film is formed by thermal curing by a stepwise heating method, and the polyimide film is oriented and rubbed with a dust-free cloth to obtain A polyimide liquid crystal alignment layer that aligns liquid crystal molecules vertically.

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Abstract

The invention discloses a temperature-adjusting negative magnetic permeability element based on liquid crystal and also discloses a preparation method thereof, aiming to solve the technical problem that the negative magnetic permeability material has fixed working frequency and narrow working frequency range. The technical scheme of the invention is as follows: liquid crystal is injected in a liquid crystal injection chamber formed by a copper clad laminate and a U-shaped batten so that liquid crystal is adopted to form the substrate of the negative magnetic permeability element; and by utilizing the characteristic that the dielectric performance of liquid crystal can be regulated easily by the environmental temperature, a temperature control device can be used to regulate the temperature and change the equivalent dielectric constant of liquid crystal, the dynamic regulation of the working frequency of the negative magnetic permeability element can be realized and the maximum regulation range can reach 800MHz.

Description

technical field [0001] The invention relates to a negative magnetic permeability device, in particular to a liquid crystal-based temperature-adjustable negative magnetic-permeability device, and also to a manufacturing method of the temperature-adjustable negative magnetic-permeability device. Background technique [0002] refer to Figure 9 , the document "Dependence of the distance between cut-wire-pair layers on resonance frequencies", Optics Express, 2008, vol.18, no.8, p.5934-5941" discloses a negative magnetic permeability based on metal sheet pairs Material, this kind of negative magnetic permeability material etches metal sheets 5 arranged periodically on the front and back sides of the copper clad laminate 1, and the metal sheets 5 are arranged in pairs on the front and back sides of the copper clad laminate 1. Under the excitation of vertically incident electromagnetic waves, the copper clad laminate 1 The metal sheets on the front and back sides generate induced c...

Claims

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Application Information

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IPC IPC(8): H01P7/00H01P11/00G02F1/355
Inventor 张富利张卫红邱克鹏汤兴刚
Owner NORTHWESTERN POLYTECHNICAL UNIV
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