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An ultra-miniaturized 2.5-dimensional absorption-penetration integrated frequency selective absorber

A wave absorber and frequency selection technology, applied in resistors, thin film resistors, non-adjustable metal resistors, etc., can solve problems such as being unfavorable to planar integration and mass production, increasing process complexity, and improving structural cycle. , to achieve the effect of facilitating plane integration and mass production, improving stealth performance and reducing RCS

Active Publication Date: 2022-07-08
XIDIAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The radome based on bandpass FSS can realize in-band wave transmission and out-of-band total reflection. However, this kind of stealth method cannot realize the stealth of dual base station or multi-base station detection. Electromagnetic waves, but out-of-band electromagnetic waves need to be lost, so the absorbing and penetrating integrated absorber was proposed
[0004] In recent years, many researchers have proposed a large number of broadband, low-profile, flexible, and multi-functional absorbers, which provide a solid theoretical basis and design examples for the development of domestic antenna stealth technology, but each has its own existence. For example, Jianjun Jiang’s team proposed two kinds of absorbing and penetrating integrated absorbers with double loss layers. This design can improve the absorbing bandwidth, but at the cost of increasing the structural period. The periods of the two designs are 20 mm and 20 mm respectively. 40 mm, the consequence of this large periodic structure is that grating lobes will appear under oblique incidence, and the grating lobes will cause the rise of the dual-station RCS
Moreover, the absorber with a period of 40 mm will produce grating lobes under normal incidence, which seriously affects the stealth performance.
Shaobin Liu's team proposed a wide-band wave-absorbing integrated absorber, but this structure introduces lumped resistance, which increases the complexity of the process and is very unfavorable for planar integration and mass production. At the same time, the lumped resistance Types are limited in high-frequency references, which is not conducive to the application of the idea of ​​this structure in high-frequency

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  • An ultra-miniaturized 2.5-dimensional absorption-penetration integrated frequency selective absorber
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  • An ultra-miniaturized 2.5-dimensional absorption-penetration integrated frequency selective absorber

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Embodiment 1

[0058] This embodiment provides an ultra-miniaturized 2.5-dimensional absorption-permeability integrated frequency-selective wave absorber. The wave absorber has a wave-transmitting window at the high frequency of the wave-absorbing band. The wave is equivalent to transparency, and the electromagnetic wave can pass through the structure without reflection, so that the antenna system in the absorber can work normally and has good wave absorption and stealth performance outside the working frequency band. Please refer to Figure 1-Figure 5 , figure 1 It is a schematic three-dimensional structure diagram of an ultra-miniaturized 2.5-dimensional absorption-penetration integrated frequency-selective wave absorber provided by the embodiment of the present invention; figure 2 is a schematic diagram of the three-dimensional structure of the metamaterial unit provided by the embodiment of the present invention; image 3 is a schematic structural diagram of the top resonant layer pro...

Embodiment 2

[0085] This embodiment verifies and illustrates the performance of the ultra-miniaturized 2.5-dimensional absorption-permeability integrated frequency-selective wave absorber of the first embodiment through a simulation experiment.

[0086] 1. Simulation conditions:

[0087] In the ultra-miniaturized 2.5-dimensional absorption-penetration integrated frequency selective absorber of this embodiment, the metamaterial units 1 are arranged in a continuous matrix of m*n, and both m and n are infinite. The transmission coefficient and reflection coefficient of the frequency selective absorber are simulated.

[0088] 2. Simulation content and results:

[0089] Simulation 1, under the condition of vertical incidence, the electromagnetic simulation of the absorption and penetration integrated wave absorber is carried out with TE polarization and TM polarization respectively, and its reflection coefficient curve is obtained, such as Figure 8 shown, Figure 8 This is a simulation curv...

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Abstract

The invention relates to an ultra-miniaturized 2.5-dimensional absorption-permeability integrated frequency-selective wave absorber, comprising a plurality of continuous and periodically arranged metamaterial units. The metamaterial unit includes a top resonant layer, a first A dielectric layer, a second dielectric layer, a third dielectric layer and a bottom resonant layer, the top resonant layer includes a first metal patch unit, a thin film resistor and four second metal patch units; the bottom of the first dielectric layer is provided with four The third metal patch units, each of which is correspondingly connected to the second metal patch unit through a metallized through hole, and a hollow structure is arranged on the bottom resonant layer. The 2.5-dimensional absorption-permeability integrated frequency-selective wave absorber of the present invention adopts graphene film to replace lumped resistance, which is convenient for plane integration and mass production, and utilizes the design of combining folded metal strips and through holes to achieve superstructure. The miniaturization suppresses the appearance of grating lobes, reduces the dual-station RCS under oblique incidence, and improves the oblique incidence stealth performance.

Description

technical field [0001] The invention belongs to the technical field of antenna stealth, and in particular relates to an ultra-miniaturized 2.5-dimensional absorption-penetration integrated frequency-selective wave absorber. Background technique [0002] The radome is a protective cover installed on the outside of electromagnetic equipment such as radar antennas on various weapons and aircraft to protect the internal system from external electromagnetic interference. The radar antenna can transmit and receive electromagnetic signals normally. [0003] With the rapid development of antenna stealth technology, the functional requirements of radomes are getting higher and higher, and FSS-type radomes have become a research hotspot. FSS is composed of a large number of periodically arranged metal patch units or slots with the same shape. composed of two-dimensional structures. When the frequency of the incident electromagnetic wave is at the resonant frequency of the unit, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/00H01Q17/00H01C7/00
CPCH01Q15/0086H01Q15/0013H01Q17/00H01C7/006
Inventor 吴边陈彪吴楠陈亮赵雨桐
Owner XIDIAN UNIV