Absorptive frequency selective surface with two alternately switchable transmission/reflection bands

Abstract

The traditional frequency selective surface (FSS) needs further improvement with the development of stealth technology, and the design of multifunctional FSSs is essential. In this letter, an active absorptive FSS (AFSS) has been designed based on the absorption structure of the spoof surface plasmon polariton (SSPP) and the switching activity of the active FSS. The active FSS embedded with PIN diodes realizes the shift of two transmission/reflection frequency bands by controlling the bias voltage of the feed network, which switches from one band-pass response (at around 3.06 GHz) to the other (at around 4.34 GHz). And when one of the transmission windows switches to the other, the original transmission window closes. The upper plasmonic structure achieves a continuous and efficient absorption band from 6.31 to 8.34 GHz. A sample was also fabricated and carried out to verify the numerical simulation, and the experimental and simulation results are consistent. This work provides new ideas for the design of active AFSS and promotes its application in common aperture radome, antenna isolation, and electromagnetic shielding.

Transmission Reflection Integrated Programmable Metasurface for Real‐Time Beam Control and High Efficiency Transmission Polarization Conversion

“…With the addition of electronic devices (such as PIN diodes, [28][29][30] varactor, [31][32][33] and MEMS switch [34] ) or material properties (such as graphene, [35] phase change materials, [36][37][38] and liquid crystal [39] ), reconfigurable characteristics have been unlocked. Especially, the strategy that introduces tunable control into the digital coding multifunctional metasurfaces has enabled implementation and manipulation of electromagnetic waves functions in combination with digital signal processing.…”

Tailorable Switching of Transmission Modes between Waveguide and Spoof Surface Plasmon Polariton for Flexible and Dynamic Control of Phase Shift

“…And it will result in the fixed functions and passive work patterns, which is far from meeting the modern demands of diversification and intelligence. Recently, reconfigurable characteristics have been unlocked with the addition of active electronic devices in the microwave regions, such as PIN diodes, , MEMS, and varactors . Active and tunable metamaterials based on these active devices can realize dynamic EM manipulations, providing a flexible platform for implementing a variety of applications and systems.…”

Direction‐Dependent Janus Metasurface Supported by Waveguide Structure with Spoof Surface Plasmon Polariton Modes

“…[21][22][23][24] Moreover, it bears mention that promising features of SSPPs in absorption applications have been exploited in several previous research outputs. [13,[25][26][27] For instance, in 2018, Yang et al developed a non-planar plasmonic structure with a straight wire array as a cover on the absorber to achieve broadband absorption at high frequency and enhance the k-vector matching absorption by dispersion engineering of SSPPs. [28] In 2021, via the dispersion engineering of SSPPs, Zhu et al designed an active absorptive frequency selective surface supported by a transmission-absorption integrated structure.…”

“…[28] In 2021, via the dispersion engineering of SSPPs, Zhu et al designed an active absorptive frequency selective surface supported by a transmission-absorption integrated structure. [25] However, people usually pay attention to transmissionabsorption characteristics of the waveguide structure (WGS) under SSPP modes, and the directionality of EM waves is rarely dug. It can be observed that the overwhelming majority of researches related to metamaterials are confined to the case where EM waves are incident from one side, leaving half of the EM space unexplored.…”