A wave absorber based on gravity field control

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...

AI Technical Summary

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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