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Preparation method of ferrite-based magnetic antenna substrate

A magnetic antenna and ferrite technology, which is applied in the field of preparation of ferrite-based magnetic antenna substrates, can solve the problems of gain influence and low antenna efficiency, and achieve the effect of reducing magnetic and dielectric loss

Pending Publication Date: 2022-05-24
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Antennas designed using this material tend to be less efficient, and the gain will also be affected, which cannot meet the needs of practical applications

Method used

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  • Preparation method of ferrite-based magnetic antenna substrate
  • Preparation method of ferrite-based magnetic antenna substrate
  • Preparation method of ferrite-based magnetic antenna substrate

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preparation example Construction

[0030] A method for preparing a ferrite-based magnetic antenna substrate of the present invention is specifically implemented according to the following steps:

[0031] Step 1, ALD treatment is carried out on the ferrite raw material, specifically:

[0032] Step 1.1, put the ferrite raw material into the atomic deposition equipment, evacuate until the chamber pressure is less than 5.3Pa, and at the same time raise the temperature to the preset temperature and keep it warm for 30min;

[0033] The preset temperature is 50-200°C;

[0034] The ferrite raw material is any one of M-type hexagonal ferrite, Y-type hexagonal ferrite, Z-type hexagonal ferrite, and spinel-type ferrite;

[0035] The general formula of M-type hexagonal ferrite is Ba(CoTi) x Fe 12-2x o 19 , 0

[0036] The general formula of Y-type hexagonal ferrite is Ba 2 co 2 Fe 12 o 12 ;

[0037] The general formula of Z-type hexagonal ferrite is Ba 3 co 2 Fe 24 o 41 ;

[0038] The general formula of ...

Embodiment 1

[0056] A method for preparing a ferrite-based magnetic antenna substrate of the present invention is specifically implemented according to the following steps:

[0057] Step 1, ALD treatment is carried out on the ferrite raw material, specifically:

[0058] Step 1.1, put the ferrite raw material into the atomic deposition equipment, evacuate until the chamber pressure is less than 5.3Pa, and at the same time raise the temperature to the preset temperature and keep it warm for 30min;

[0059] The preset temperature is 150°C; the raw material of ferrite is spinel ferrite; the general formula of spinel ferrite is Ni x Zn y co z Cu 1-x-y-z Fe 2 o 4 , 00.5 Zn 0.5 Fe 2 o 4 (Abbreviated as: NZO);

[0060] In step 1.2, the precursor material is heated and vaporized to form a precursor gas, and the precursor gas and the oxygen source gas are respectively passed into the atomic deposition equipment for atomic deposition reaction;

[0061] The precursor is trimethylaluminum Al(...

Embodiment 2

[0068] A method for preparing a ferrite-based magnetic antenna substrate of the present invention is specifically implemented according to the following steps:

[0069] Step 1, ALD treatment is carried out on the ferrite raw material, specifically:

[0070] Step 1.1, put the ferrite raw material into the atomic deposition equipment, evacuate until the chamber pressure is less than 5.3Pa, and at the same time raise the temperature to the preset temperature and keep it warm for 30min;

[0071] The preset temperature is 170°C;

[0072] The ferrite raw material is Z-type hexagonal ferrite; the general formula of Z-type hexagonal ferrite is Ba 3 co 2 Fe 24 o 41 ;

[0073] In step 1.2, the precursor material is heated and vaporized to form a precursor gas, and the precursor gas and the oxygen source gas are respectively passed into the atomic deposition equipment for atomic deposition reaction;

[0074] The precursor is tetrakis(dimethylamino)titanium C 8 h 24 N 4 Ti; the h...

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Abstract

The invention discloses a preparation method of a ferrite-based magnetic antenna substrate, which specifically comprises the following steps: firstly, carrying out ALD (Atomic Layer Deposition) treatment on a ferrite raw material; and carrying out composite processing on the ferrite powder and the polymer to obtain the antenna substrate. According to the method, the appropriate low-loss deposition layer material is selected, the surface of the ferrite powder is processed through the ALD technology, the thickness of the deposition layer is controlled, and the magnetic dielectric loss of the substrate is reduced on the premise that the magnetic conductivity is not affected.

Description

technical field [0001] The invention belongs to the technical field of antenna substrate preparation, and in particular relates to a preparation method of a ferrite-based magnetic antenna substrate. Background technique [0002] The miniaturization (compact) design of antennas based on traditional non-magnetic dielectric substrates often conflicts with the broadband requirements of antennas. In response to this problem, researchers are currently mainly optimizing the physical structure of the antenna to obtain a certain degree of improvement. According to electromagnetic theory, the size of the antenna is an integer multiple of a quarter of the wavelength of the medium, so using magnetic materials as the antenna substrate can significantly reduce the physical size of the antenna by increasing the permeability of the medium. At the same time, the bandwidth of the antenna can be understood as the impedance matching problem between the medium and the air. As the magnetic perme...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08L27/16C08L21/00C08L23/06C08L23/08C08K3/22
CPCC08K3/22C08K2201/01C08L63/00C08L27/16C08L21/00C08L23/06C08L23/0815
Inventor 何立王颢宇范萍萍席晓莉
Owner XIAN UNIV OF TECH
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