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Dipole resonance resistance type absorber

A resistive, dipole technology is applied in the field of microwave absorbers of arrayed rectangular rings, which can solve the problems of increased loss, unrealistic mass production, and limited wide-band performance.

Pending Publication Date: 2022-02-18
THE HONG KONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to expand the absorption band of metamaterial absorbers, people have made great efforts in increasing losses (that is, using resistive sheets or loading block elements) or stacking / integrating resonant units (that is, building multilayer patch absorbers of different sizes). Great efforts, but wideband performance of these efforts is still limited
Furthermore, the geometry of such structures is rather complex, making their mass production impractical

Method used

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Examples

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Embodiment Construction

[0040] Dipole-resonant resistive absorbers (DRRAs) use magnetically excited (electric) dipole resonances, which not only guarantee an appreciable permeability matched to the vacuum impedance, but also result in a large resonant linewidth due to radiation losses. The DRRA's design also takes advantage of "dispersion engineering" by tuning the dissipative resistance to achieve broadband absorption conditions. In addition, the self-similar hierarchical structure of DRRA extends the absorption spectrum to an ultra-broadband system. In addition, the use of microwave absorbing sponges allows absorption of diffraction orders in the higher frequency regime.

[0041] Effective sample parameter ε eff and μ eff (effective permittivity and permeability, respectively) are important to characterize the functionality of dipole resonant resistive absorbers (DRRAs), and to understand their underlying mechanisms. The following illustrates how these two continuous parameters are extracted fro...

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Abstract

The invention discloses a dipole resonance resistance type absorber which is a metamaterial working in a microwave system. A single unit of the dipole resonance resistance type absorber comprises: a first rectangular conducting ring, wherein the first rectangular conducting ring is provided with a pair of first resistors which are electrically conducted with the first rectangular conducting ring; the second rectangular conductive ring array that includes a plurality of linear arrays parallel to each other, wherein each linear array includes a plurality of second rectangular conductive rings linearly arranged in the first direction. Each second rectangular conducting ring is provided with a pair of second resistors electrically connected with the second rectangular conducting ring, and the first rectangular conducting ring is installed above the second rectangular conducting ring array. The back side of the structure is a conductive layer. A single unit of the dipole resonance resistance type absorber can be expanded into an array type structure, and the dipole resonance resistance type absorber without polarization dependence is formed.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Patent Application No. 63 / 147,763, filed February 10, 2021, and U.S. Provisional Patent Application No. 63 / 103,470, filed August 7, 2020, which are incorporated by reference in their entirety into this article. technical field [0003] This application relates to microwave absorbers, and more particularly to a microwave absorber formed as an array of rectangular rings in a multilayer, layered structure, each rectangular ring loaded with a resistor Background technique [0004] Electromagnetic wave absorption has been a persistent research topic for decades. The recent development of metamaterial absorbers (MMAs) based on engineered structures with subwavelength thicknesses has injected new impetus into this topic and has potential applications in a wide range of frequency bands, such as microwave to terahertz, near-infrared, and visible light. Microwave absorption ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q17/00H05K9/00
CPCH01Q17/008H05K9/0081H01Q17/002H01Q9/16H01Q17/00
Inventor 沈平屈思超侯雨箫
Owner THE HONG KONG UNIV OF SCI & TECH