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Composite wave absorber with dual dynamic regulation and control as well as preparation method and application of composite wave absorber

A wave absorber and dynamic technology, applied in the direction of electrical components, antennas, magnetic field/electric field shielding, etc., can solve the problems of fixed absorption frequency, difficulty in adapting, thick and heavy, etc., achieve good absorption performance and improve absorption performance

Pending Publication Date: 2022-03-04
CHONGQING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The medium layer of the metamaterial absorber reported in the existing reports basically selects conventional lossy materials, such as epoxy resin (FR-4), polyester resin (PET) and other materials, and the loss mechanism of the absorber composed of them mostly depends on Due to the dielectric loss of the material, it is usually relatively thick and the absorption frequency is relatively fixed. It is difficult to adapt to the new needs of today's increasingly lightweight equipment, such as aerospace, military stealth / reconnaissance and other fields.

Method used

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  • Composite wave absorber with dual dynamic regulation and control as well as preparation method and application of composite wave absorber
  • Composite wave absorber with dual dynamic regulation and control as well as preparation method and application of composite wave absorber
  • Composite wave absorber with dual dynamic regulation and control as well as preparation method and application of composite wave absorber

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Preparation of a composite absorbing body with dual dynamic regulation, the specific method is as follows:

[0035] (1) Turn the four-in-one-in-one open circles to the circle, and set the super-surface material to form a super surface material at four openings, respectively, and the first active device, respectively. The second active device, the third active device, and the fourth active device, these four active devices are set to exactly the same device, and the active device in this implementation is in parallel, wherein the resistance of the resistance is 1000Ω, the capacitance value is 0.5 pF.

[0036] (2) Preparation of a dielectric layer made of magnet adhesive material: first weigh a certain amount of MWCNTs, and add n-hexane to the n-hexane therein, the added amount is capable of complete wetting MWCNTs, stirred and sufficiently Ultrasonic oscillation is dispersed; after the N-HEXANE is evaporated, the A component of MWCNTS and PDMS (Dow Corning 184 silicone rubbe...

Embodiment 2

[0047] First, MRE material, super surface structure, and metal back plate were prepared by the method of the foregoing Example 1.

[0048] Next, four identical active devices are set according to the method in Example 1, respectively, the first active device, the second active device, the third active device, and the fourth active device, wherein the active device is The resistance and capacitance are parallel. By changing the parameters of the active device on the super surface, if the resistance is set to 1000 ohms, the capacitance values ​​of the capacitance are set to 0.5pf, 1pf, 1.5pf, 2pf, 5pf, and five values, to change the composite absorbing material. Absorption performance.

[0049] Figure 7 A reflection curve of a composite absorbing body containing different parameters prepared for Example 2, from Figure 7 It can be seen that when it is determined that the resistance value is 1000 Euros, the capacitance value increases the peak frequency of the composite absorbing mat...

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Abstract

The invention relates to a composite wave absorber with dual dynamic regulation and control as well as a preparation method and application thereof, and belongs to the technical field of preparation of wave absorbers. The invention discloses a composite wave absorbing body with dual dynamic regulation and control, the wave absorbing body is provided with a plurality of wave absorbing units in a periodic array in the horizontal and vertical directions, and each wave absorbing unit is composed of a metal metasurface, a dielectric layer made of a magnetorheological gel material and a metal back plate larger than the skin depth of an incident wave from top to bottom. Firstly, a metasurface resonance unit is constructed through a magnetron sputtering method, the constructed metasurface is provided with a resonance opening and a reserved position for welding an active device, and the resonance frequency and equivalent impedance can be conveniently adjusted by changing parameters of the active device; secondly, the magnetorheological gel serves as a dielectric layer, certain loss capacity is provided, the absorption performance is improved, and meanwhile electromagnetic parameters of the dielectric layer are dynamically adjusted by regulating and controlling the appearance of the magnetorheological gel through a magnetic field.

Description

Technical field [0001] The present invention belongs to the technical field of absorbing body, and involves a composite absorbing body having dual dynamic regulation and a preparation method thereof. Background technique [0002] With the development and advancement of the information age, electromagnetic wave as information carrier has spread all over the entire living space of human beings, so, whether in basic research or engineering applications, absorbing materials have received attention, especially in military fields. The absorbing material refers to a type of material that converts the incident electromagnetic wave absorption into other forms of energy and loss. A conventional absorbing material is an electromagnetic property based on the material itself, which effectively converts the incident electromagnetic wave into other forms of energy, and completes electromagnetic wave absorption. The absorbing properties of the material mainly depend on the two parameters, namely...

Claims

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Application Information

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IPC IPC(8): H05K9/00H01Q17/00
CPCH05K9/0077H01Q17/00
Inventor 黄鑫陈大超李锐杨平安罗久飞周志浩向莎刘中邦
Owner CHONGQING UNIV OF POSTS & TELECOMM
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