Ultra-wideband adjustable metasurface wave absorber unit, patch array and control method

Abstract

The invention belongs to a metasurface wave absorber, and aims to solve the problems that the working bandwidth which can be realized by a passive wave absorber in the conventional metasurface wave absorber under a low-profile structure is limited, the working performance is fixed once the processing is finished, and the wave absorbing broadband realized by loading an adjustable component in the structure is limited. The invention provides an ultra-wideband adjustable metasurface wave absorber unit, a patch array and a control method, the wave absorber unit comprises a dielectric substrate, the dielectric substrate is provided with two first metal patches and a second metal patch, a gap is reserved between the adjacent metal patches, a variable capacitance diode is connected in series between the two first metal patches, a switching diode is connected in series between the first metal patch and the second metal patch which are located in the middle, and the second metal patch and the two first metal patches are connected with a direct-current voltage source through high-impedance bias lines. The patch array enables the plurality of metasurface wave absorber units to be arranged in a matrix, controls the on-off of the switching diodes during control, and adjusts the capacitance value of the variable capacitance diodes.

Description

technical field [0001] The invention belongs to a supersurface absorber, in particular to an ultra-broadband adjustable supersurface absorber unit, patch array and control method thereof. Background technique [0002] Electromagnetic metasurface is an emerging artificial electromagnetic structure. Through microstructure design and special spatial sequence arrangement, it can break through the electromagnetic properties of conventional materials and realize customized control of electromagnetic wave amplitude, phase and polarization. [0003] Utilizing the amplitude control characteristics of the metasurface, it can achieve strong absorption of radar waves, thereby reducing the radar cross section of the target, and realizing the stealth of the target to the detection radar. Compared with classical coated and traditional structural absorbers, metasurface absorbers have outstanding advantages such as low profile thickness, light weight, no surface loss layer, can be used aroun...

AI Technical Summary

Problems solved by technology

Passive absorbers are very effective in improving the absorbing bandwidth, but the working bandwidth that can be achieved under the low-profile structure is limited, and once the processing is completed, its working performance is also fixed

There are also some studies that load adjustable components in the structure, so that the working frequency band of the absorber can be dynamically adjusted according to the needs, so that broadband work can be realized without increasing the section height, and the extreme frequency can be guaranteed at each frequency point. High absorbing rate, but the achieved absorbing broadband is relatively limited

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