Multifunctional active frequency selective surface and control method thereof

Abstract

The invention discloses a multifunctional active frequency selective surface and a control method thereof. The active frequency selective surface comprises a dielectric substrate and two metal periodic arrays arranged orthogonally on the upper side and lower side of the dielectric substrate; each metal periodic array comprises a plurality of metal units in periodic array distribution; and each metal unit is square and includes two metal thin wire structures, two metal thick wire structures and a PIN diode. When the multifunctional active frequency selective surface works, direct-current bias voltage excitation is applied to the upper-layer metal periodic array and the lower-layer metal periodic array so as to carry out encoding; and one of an electromagnetic switch function and a polarization selection function can be realized by changing encoding states, so that the multi-functional active frequency selective surface can be in a double-polarized band-pass state, a double-polarized shielding state, a TE polarized wave selection state or a TM polarized wave selection state. The multifunctional active frequency selective surface of the invention integrates many functions, is simple in manufacture, has good angle stability, can actively control electromagnetic waves and has a bright application prospect.

Description

technical field [0001] The invention relates to the technical field of electromagnetic metamaterials, in particular to an adjustable multifunctional active frequency selective surface and a control method thereof. Background technique [0002] Frequency Selective Surface (FSS) is composed of periodically arranged metal patches or gaps, which has good spatial filtering characteristics and can reflect out-of-band electromagnetic waves while transmitting in-band electromagnetic waves. [0003] After the traditional passive FSS is processed, its electromagnetic properties are basically fixed and cannot be changed with changes in the external environment. Active Frequency Selective Surface (AFSS) can actively change the electromagnetic properties of FSS by changing the external excitation (such as voltage magnitude, electric field strength and light intensity, etc.). Electronically controlled AFSS can achieve reconfigurable electromagnetic characteristics by loading active devic...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a multifunctional active frequency selective surface and its control method for the defects involved in the background technology, effectively solving the problem of redundant feeders and single function of the existing active frequency selective surface , can be widely used in electromagnetic stealth, electromagnetic compatibility and reconfigurable device design and other fields

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