A polarization-insensitive ultra-broadband terahertz absorber with multilayer structure

A multi-layer structure, ultra-broadband technology, applied in the field of terahertz devices, radio communication, can solve the problem of THz absorber with little absorption performance

Active Publication Date: 2021-06-08
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, most of the absorbers in the field of absorbers currently work in the GHz band, and there are few THz absorbers with better absorption performance. With the development of THz technology, it is widely used in physics, chemistry, electronic information, and life sciences. , material science, astronomy, atmospheric and environmental monitoring, communication radar, national security and anti-terrorism, and other important fields have unique advantages and huge application prospects.

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  • A polarization-insensitive ultra-broadband terahertz absorber with multilayer structure
  • A polarization-insensitive ultra-broadband terahertz absorber with multilayer structure
  • A polarization-insensitive ultra-broadband terahertz absorber with multilayer structure

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Embodiment Construction

[0028] This embodiment provides a polarization-insensitive ultra-broadband terahertz absorber with a multi-layer structure, which includes a bottom reflector, the bottom reflector is provided with a tailored dielectric substrate, and the uppermost layer of the dielectric substrate is provided with a A resonant unit composed of two layers of metal, and a resonant unit composed of two layers of metal is embedded inside the medium. The present invention mainly relies on the resonance of the metal resonant unit to achieve the effect of absorbing electromagnetic waves, and the wave absorber has three layers of resonant units in total. The resonance unit of each layer has its own resonance effect, but the resonance effect of the single layer resonance unit is not very obvious, but will image 3 , Figure 4 , Figure 5 After the three resonant units are arranged in the vertical direction, through the mutual resonance between each layer, the ultra-broadband absorption effect can be ...

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Abstract

The present invention is a polarization-insensitive ultra-broadband terahertz wave absorber with a multi-layer structure, comprising a bottom reflection plate and a tailored dielectric substrate arranged above it, and a layer of metal patch is arranged above the dielectric substrate The first resonant unit of the dielectric substrate is embedded with a second resonant unit composed of two layers of metal patches. The invention adopts multi-layer structure design, uses metal as resonant material, and achieves broadband absorption effect through mutual resonance between layers. The absorption bandwidth of the absorber is expanded from broadband to ultra-wideband. And because the structure of the absorber has symmetry, the absorption performance of the absorber for TE polarized waves and TM polarized waves is basically the same. The absorber can realize ultra-broadband absorption effect in the THz band.

Description

technical field [0001] The invention relates to an ultra-broadband terahertz wave absorber, in particular to a polarization-insensitive ultra-broadband terahertz wave absorber with a multilayer structure, which belongs to the fields of radio communication and terahertz devices. Background technique [0002] With the development of information technology, microwave devices have been widely used in various systems in communication. Such as the antenna at the transmitting end, the electromagnetic shielding box, etc. Preventing electromagnetic interference and electromagnetic stealth have broad application prospects in military and civilian fields. Electromagnetic absorber is a kind of microwave device designed to meet this requirement, and it has been more and more widely used in the field of communication. Moreover, with the rapid development of military technology and wireless communication systems, the initial single-frequency absorber can no longer meet the application re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q17/00
CPCH01Q17/008
Inventor 章海锋刘佳轩杨靖张浩
Owner NANJING UNIV OF POSTS & TELECOMM
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