Multifunctional broadband dual-polarization active wave absorbing and reflecting device

Abstract

The invention discloses a multifunctional broadband dual-polarization active wave absorbing and reflecting device which comprises M * N active frequency selective surface units arranged periodically, M is larger than or equal to 2, and N is larger than or equal to 2. Each active frequency selection surface unit comprises a top resonance layer and a first bias circuit; a plurality of PIN diodes are symmetrically arranged in the top resonance layer, and are used for realizing four independent switchable wave absorption and reflection combination states, including dual-polarization wave absorption, dual-polarization reflection, TM polarization wave absorption and TE polarization reflection, and TE polarization wave absorption and TM polarization reflection, through on-off of the PIN diodes; the first bias circuit is used for providing bias voltage for the PIN diode in the top resonance layer and controlling the on-off of the PIN diode; a first dielectric layer, a metal grounding plate and a second dielectric layer are sequentially arranged between the top resonance layer and the first bias circuit. According to the broadband dual-polarization antenna, a symmetrical geometric structure design is adopted, the stable dual-polarization characteristic can be provided, wave absorption and reflection switching can be achieved by controlling on-off of the PIN diodes, the broadband dual-polarization antenna has the characteristics of being broadband, dual-polarization, multifunctional and the like, the manufacturing process is simple, and the broadband dual-polarization antenna has important application prospects in the aspect of stealth equipment.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic protection, and in particular relates to a multifunctional broadband dual-polarization active wave absorber and reflector. Background technique [0002] Electromagnetic absorbers have particularly important applications in the fields of electromagnetic protection materials such as stealth antennas, smart skins, radomes, and electronic countermeasures, and have been extensively studied in the past few decades. Traditional electromagnetic absorbers are usually made of absorbing materials such as carbon and ferrite, which have disadvantages such as high density and large thickness, which limit practical engineering applications. [0003] Frequency selective surface (FSS) is a typical form of electromagnetic protection materials, which has special spatial filtering characteristics and flexible functions, and can be applied to various frequency bands of electromagnetic waves through structural ...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a multi-functional broadband dual-polarization active absorber and reflector for the above-mentioned deficiencies in the prior art, adopting a symmetrical geometric structure design, which can provide relatively stable dual-polarization characteristics, And by controlling the on-off of the PIN diode, the wave-absorbing and reflecting switching can be realized. It has the characteristics of broadband, dual polarization, and multi-function, and the manufacturing process is simple. It has important application prospects in stealth equipment and can effectively solve the function of the existing structure Problems such as single design, narrow bandwidth, and polarization sensitivity

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