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Adjustable terahertz broadband microwave absorber

A wave absorber and terahertz technology, which is applied in the field of terahertz wave absorption, can solve problems such as non-adjustability, lack of symmetry, and complex design, and achieve the effects of reducing requirements, realizing dynamic adjustment, and simple structure

Inactive Publication Date: 2018-11-06
BEIJING UNIV OF POSTS & TELECOMM
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  • Claims
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Problems solved by technology

Through research, it is found that most of the structures of terahertz metamaterial absorbers proposed so far are not adjustable, and for adjustable structures, many designs are too complicated, such as using spiral structures, multi-layer structures, etc., or do not have symmetry , so that the absorption effect can only be realized in one polarization mode

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  • Adjustable terahertz broadband microwave absorber
  • Adjustable terahertz broadband microwave absorber
  • Adjustable terahertz broadband microwave absorber

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Embodiment Construction

[0030] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0031] At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0032] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0033] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, techniques, methods and devices should be considered part of the description. ...

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Abstract

The invention discloses an adjustable terahertz broadband microwave absorber. A plurality of periodic units are periodically arranged; the periodic unit has a multilayer structure including a patch layer, a dielectric layer and a vanadium dioxide thin film layer, the dielectric layer is located between the patch layer and the vanadium dioxide thin film layer, wherein a plurality of metal patches disposed on the dielectric layer form a patch layer. The adjustable terahertz broadband microwave absorber of the invention provides a microwave absorber structure based on vanadium dioxide, and can realize the broadband strong absorption of terahertz waves; by adopting the temperature control property of vanadium dioxide, the dynamic adjustment of absorbing property can be realized; the performance of microwave absorber is not sensitive to the position of metal patch, which reduces the requirement of processing and production and has stronger practicability, the structure is simple and can beapplied to absorb electromagnetic wave in other frequency bands such as far-infrared, middle-infrared and so on.

Description

technical field [0001] The invention relates to the technical field of terahertz absorbing, in particular to an adjustable terahertz broadband absorber. Background technique [0002] Terahertz wave Terahertz (THz) usually refers to electromagnetic waves with a frequency range between 0.3 and 10 THz, and is a special area on the electromagnetic spectrum transitioning from electronics to photonics. Terahertz waves not only have some characteristics of microwave and light waves, but also have unique transient, low-energy, high-penetration and anti-interference capabilities. Very broad application prospects. However, due to the lack of effective terahertz sources and detectors, conventional materials in nature are difficult to apply to this frequency band. In order to improve the accuracy and sensitivity of terahertz detection devices, research on absorbing materials in the terahertz band is particularly important. [0003] Absorbing material is a material that can convert el...

Claims

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Application Information

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IPC IPC(8): H01Q17/00H05K9/00G02B1/00
CPCG02B1/002H01Q17/00H05K9/0081
Inventor 亓丽梅刘畅武明静陈智娇姚远俞俊生
Owner BEIJING UNIV OF POSTS & TELECOMM
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