A real-time controllable wave absorber based on ferroelectric ferromagnetic composite film loading

A composite film and wave absorber technology, applied in the direction of electrical components, antennas, etc., can solve the problems of inability to control in real time, unfavorable application environment of microwave devices, etc., and achieve the effect of flexible control

Active Publication Date: 2022-07-15
GUIZHOU MINZU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the completion of processing, the function of traditional microwave absorbing devices is fixed and cannot be adjusted in real time, which is not conducive to the adaptation of microwave devices to complex application environments.

Method used

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  • A real-time controllable wave absorber based on ferroelectric ferromagnetic composite film loading
  • A real-time controllable wave absorber based on ferroelectric ferromagnetic composite film loading
  • A real-time controllable wave absorber based on ferroelectric ferromagnetic composite film loading

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Example 1. A real-time controllable wave absorber based on ferroelectric ferromagnetic composite film loading, consisting of figure 1 As shown, including the dielectric plate 1, the front of the dielectric plate 1 is covered with a ferroelectric ferromagnetic composite film 2, the surface of the ferroelectric ferromagnetic composite film 2 is provided with a metal microstrip frame 3 along the edge of the dielectric plate 1, and the ferroelectric ferromagnetic composite film 2 is provided with a metal microstrip frame 3. 2. There is also a cross-shaped metal microstrip 4 in the center of the surface, and the middle of the cross-shaped metal microstrip 4 is connected to the metal layer 7 arranged on the back of the dielectric plate 1 through the metal via 5; The structure can adjust the wave absorption peak position of the wave absorber in real time by utilizing the characteristic that the dielectric constant and the magnetic permeability of the ferroelectric ferromagneti...

Embodiment 2

[0038] Example 2. A real-time controllable wave absorber based on ferroelectric ferromagnetic composite film loading, consisting of figure 1 and 2 The size parameters of each part are shown in Table 1.

[0039] Table 1

[0040] structure name symbol Dimensions (mm) Media board side length L 1

[0041] The dielectric plate of the absorber adopts BaAl with a dielectric constant of 5.0 2 Si 2 O 8 ceramic substrate, the absorber S 11 The calculation results of scattering parameters and electromagnetic field distribution using finite integration are as follows: Figures 3 to 6 shown. image 3 S is the absorber in the middle 11 The scattering characteristic diagram lists the absorption frequency diagram of the sample structure, and it can be seen that the structure has good absorption characteristics. Figure 3 to Figure 4 S after loading the bias electric field and magnetic field for the absorber 11 Reflection coefficient. The reflection characterist...

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Abstract

The invention discloses a real-time controllable wave absorber based on ferroelectric ferromagnetic composite film loading. Including a dielectric plate (1), the front surface of the dielectric plate (1) is covered with a ferroelectric ferromagnetic composite film (2), and the surface of the ferroelectric ferromagnetic composite film (2) is provided with a metal microstrip frame ( 3), the surface of the ferroelectric ferromagnetic composite film (2) is also provided with a cross-shaped metal microstrip (4) in the center, and the cross-shaped metal microstrip (4) passes through a metal via hole (5) in the middle and is arranged on the dielectric plate (1) The metal layer (7) on the back is connected; the metal layer (7) covers the back of the dielectric board (1). The structure can adjust the wave absorption peak position of the wave absorber in real time by utilizing the characteristic that the dielectric constant and the magnetic permeability of the ferroelectric ferromagnetic composite film (2) can be continuously changed under an external bias voltage. The invention can use bias electric field or magnetic field to independently adjust the wave absorption peak position of the wave absorber in real time, and can realize low reflection loss, and has the characteristics of simple structure, flexible and controllable frequency band, and strong wave absorption ability.

Description

technical field [0001] The invention relates to the technical field of microwave transmission lines, in particular to a real-time controllable wave absorber based on ferroelectric ferromagnetic composite film loading. Background technique [0002] With the continuous updating of military defense systems around the world, armed targets are more and more likely to be detected, tracked and attacked, posing a great threat to the survivability of military targets. Therefore, stealth technology has become a military force that is highly valued by the world. Absorbing materials can convert the electromagnetic energy of incident electromagnetic waves into heat energy or use the material structure to cancel the interference of incident microwaves, which greatly improves the survivability of military targets. Military systems are required to produce products with higher integration and more stable working characteristics , Absorbers with more diverse functions. However, with the comp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q17/00
CPCH01Q17/008
Inventor 胡明哲黄志开
Owner GUIZHOU MINZU UNIV
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