A wave absorber based on gravity field control

A wave absorber and gravitational field technology, applied in antennas, electrical components, etc., can solve the problems of complex operation process, complex and even harsh requirements of control means, and limit the practical use of metamaterial wave absorbers, so as to overcome the complex regulation, Convenient regulation and absorption frequency domain, excellent application prospects

Active Publication Date: 2021-04-06
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Although the above-mentioned metamaterial absorbers have excellent prospects, most of the current adjustable absorbers have a problem, because such absorbers have complex and even harsh requirements for the control means, which largely limits the use of metamaterial absorbers. The actual use of material absorbers, even using traditional temperature control or circuit control, has a complicated operation process

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  • A wave absorber based on gravity field control
  • A wave absorber based on gravity field control
  • A wave absorber based on gravity field control

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Embodiment Construction

[0029] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0030] The invention provides a wave absorber based on gravity field control, such as Figures 1 to 4 As shown, its structure is composed of the underlying metal reflector, the dielectric substrate, the metal resonant unit on the surface of the dielectric substrate, and the seawater and oil inside the dielectric substrate. The dielectric substrate is FR-4 with a large loss tangent. The first and second grooves are cylinders and cuboids of equal volume respectively. Seawater and oil are injected into the cylinders and cuboids respectively. Since the volumes of the cylinders and cuboids are equal, by rotating the wave absorber, the seawater in the grooves And the position of the oil changes, so as to realize the controllability of the absorption frequency domain.

[0031] The wave absorber of the present invention has three working states when it w...

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Abstract

The invention discloses a wave absorber based on gravity field control, which comprises a metal reflection plate at the bottom and a dielectric substrate arranged above it. The upper surface of the dielectric substrate is provided with a metal resonant unit, inside which are respectively placed oil and The first and second grooves of seawater, and there is a connecting part between the first and second grooves, by rotating the wave absorber, under the action of gravity field, the positions of seawater and oil change, realizing dynamic regulation of different frequencies . The present invention abandons the original cumbersome control and operation means, and can realize the dynamic control of the absorption frequency domain only by rotating the wave absorber. This method of using gravity field control is quite convenient, and the processing materials are easy to obtain , the absorber itself is thinner and has more applicable scenarios.

Description

technical field [0001] The invention relates to a wave absorber, in particular to a wave absorber regulated and controlled based on a gravity field, and belongs to the fields of radio communication and microwave devices. Background technique [0002] As a periodic material based on artificial synthesis, metamaterials are often used to manufacture wave absorbers because they have different material parameters from ordinary materials, such as negative reflectivity and negative refractive index. The absorber is usually composed of basic units arranged periodically, has a small physical size, and can have a specific absorption capacity in the target frequency domain. In recent years, it has been widely used in various civilian applications such as preventing electromagnetic interference and electromagnetic stealth. , Military field. In the military field, microwave absorbers can be used as coatings for weapons and equipment, so that weapons have the ability of electromagnetic s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q17/00
CPCH01Q17/007
Inventor 章海锋田星亮
Owner NANJING UNIV OF POSTS & TELECOMM
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