Eddy current suppression structure and preparation method thereof

A technology of eddy current suppression and thickness direction, which is applied in the field of eddy current suppression structure and its preparation, can solve the problems of stress discontinuity and low radiation efficiency of magnetoelectric antennas, and achieve the goal of solving stress discontinuity, improving soft magnetic characteristics, and increasing radiation efficiency Effect

Pending Publication Date: 2020-04-07
SICHUAN BAW ME MICRO&NANO TECH CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0008] The beneficial effects of the present invention are: the present invention inserts the insulating medium layer in the magnetostrictive layer to reduce the eddy current loss, improves the radiation efficiency of the bulk acoustic wave magnetoelectric antenna, and solves the problem of air gap space between the magnetostrictive layer in the prior art scheme Problems causing stress discontinuity and low radiation efficiency of magnetoelectric antennas

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  • Eddy current suppression structure and preparation method thereof
  • Eddy current suppression structure and preparation method thereof
  • Eddy current suppression structure and preparation method thereof

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Embodiment 1

[0046] like Figure 3-11 , as the basic solution of the present invention, an eddy current suppression structure includes a magnetostrictive layer 1 and an insulating dielectric layer, the insulating dielectric layer is arranged in the magnetostrictive layer 1 for breaking eddy currents to suppress Eddy current losses in bulk acoustic wave magnetoelectric antennas.

[0047] like image 3 As a further solution of this embodiment, at least one layer of the first insulating dielectric layer 2 is disposed in the magnetostrictive layer 1 along its thickness direction.

[0048] As a further solution of this embodiment, the first insulating dielectric layer 2 has three layers parallel to each other, the thickness of each first insulating dielectric layer 2 is 5-100 nm, and the material of the magnetostrictive layer 1 is FeGaB film, the total thickness of the FeGaB film is 1 μm, the electrical conductivity range of the first insulating dielectric layer 2 is 0-100S / m, and the first i...

Embodiment 2

[0052] like Figure 3-11 , as the basic solution of the present invention, an eddy current suppression structure includes a magnetostrictive layer 1 and an insulating dielectric layer, the insulating dielectric layer is arranged in the magnetostrictive layer 1 for breaking eddy currents to suppress Eddy current losses in bulk acoustic wave magnetoelectric antennas.

[0053] like Figure 4 As a further solution of this embodiment, at least one layer of the second insulating dielectric layer 3 is arranged in the magnetostrictive layer 1 along its width direction.

[0054] As a further solution of this embodiment, the second insulating dielectric layer 3 has three layers and are parallel to each other, the thickness of each second insulating dielectric layer 3 is 5-30nm, and the material of the magnetostrictive layer 1 is FeGaB film, the total thickness of the FeGaB film is 1 μm, the electrical conductivity range of the second insulating dielectric layer 3 is 0-100S / m, and the ...

Embodiment 3

[0058] like Figure 3-11 , as the basic solution of the present invention, an eddy current suppression structure includes a magnetostrictive layer 1 and an insulating dielectric layer, the insulating dielectric layer is arranged in the magnetostrictive layer 1 for breaking eddy currents to suppress Eddy current losses in bulk acoustic wave magnetoelectric antennas.

[0059] like Figure 5 and 6 As a further solution of this embodiment, at least one layer of first insulating dielectric layer 2 is arranged in the magnetostrictive layer 1 along its thickness direction, and at least one layer of second insulating medium layer 2 is arranged in the magnetostrictive layer 1 along its width direction. The insulating medium layer 3, the first insulating medium layer 2 and the second insulating medium layer 3 are arranged at intervals across each other.

[0060] like Figure 5 and 6 , as a further solution of this embodiment, the first insulating dielectric layer 2 has three layers...

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Abstract

The invention relates to an eddy current suppression structure, and the structure comprises a magnetostriction layer and an insulating dielectric layer, wherein the insulating dielectric layer is arranged in the magnetostriction layer and is used for breaking eddy current so as to suppress eddy current loss of a bulk acoustic wave magnetoelectric antenna. According to the invention, the insulatingdielectric layer is inserted into the magnetostriction layer to reduce eddy current loss, so that the radiation efficiency of the bulk acoustic wave magnetoelectric antenna is improved, and the problems of discontinuous stress and low radiation efficiency of the magnetoelectric antenna caused by the air gap interval magnetostriction layer in the prior art are solved. The insulating dielectric layer is used as the spacer layer, so the soft magnetic characteristic of the magnetostriction layer can be improved, the coercive force of the magnetostriction layer is effectively reduced, and the sensitivity of the radiation region is improved. Through simulation analysis, the eddy current loss can be effectively reduced by more than 65%, and the radiation efficiency of the magnetoelectric antennais greatly improved.

Description

technical field [0001] The invention relates to the field of radio frequency microelectromechanical systems, in particular to an eddy current suppression structure and a preparation method thereof. Background technique [0002] At present, the antennas commonly used in smart phones, tablet computers, radio frequency devices, radars and other devices are electrically small antennas based on the working principle of current conduction, usually large in size, difficult to miniaturize, and have disadvantages such as difficult impedance matching and low radiation efficiency. . Bulk acoustic wave magnetoelectric antenna uses the principle of bulk acoustic wave resonance and magnetoelectric effect to radiate electromagnetic signals, which fundamentally solves the problems of difficult impedance matching and low radiation efficiency of electrically small antennas, and the miniaturization of devices can be realized by using the principle of acoustic wave resonance . The bulk acoust...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/36H01Q1/38C23C14/35C23C14/06C23C14/08C23C14/04
CPCC23C14/042C23C14/067C23C14/081C23C14/35H01Q1/36H01Q1/38
Inventor 彭春瑞李君儒陈锶高杨任万春
Owner SICHUAN BAW ME MICRO&NANO TECH CO LTD
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