A dual‐function switchable and frequency tunable active frequency selective surface

Liang, Yan-Hong; Chen, Mingsong; Peng, Lin

doi:10.1002/mmce.22897

Cited by 3 publications

(2 citation statements)

References 25 publications

(37 reference statements)

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“…Future developments will aim to improve sensor sensitivity and integrate increasingly miniaturized MAbased sensors with reconfigurable materials or devices, such as PIN and liquid crystal diodes (LCDs), to provide multifunctional behavior with switchable functions. These techniques could include absorption/polarization conversion [16] and frequency-tunable operation [51] to enhance sensing performance and broaden the range of applications, particularly in the fields of environmental monitoring and biomedical research.…”

Section: Introductionmentioning

confidence: 99%

Fractal Metamaterial Surfaces for UHF Sensing Applications

Venneri,

Costanzo,

Borgia

et al. 2024

IEEE Access

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A dual-band fractal metamaterial absorber is proposed as a promising alternative for sensing applications. A preliminary prototype, useful to validate the proposed configuration, is designed to operate in the Ultra-High Frequency (UHF) range. The inherent miniaturization skills of fractal geometries are effectively exploited to design and fabricate multiband/broadband absorbers with a small lattice size (0/2 at the smaller operating frequency f0) and a very thin profile (0/100). Two pairs of Minkowski fractal patches, alternately arranged in four different quadrants and properly sized to achieve two distinct absorption peaks, are assumed for the absorber-sensor configuration. Good sensing performance in terms of sensitivity and quality factor (Q) is achieved in the framework of dielectric material diagnostics. Very high absorption rates (>99%) and a quite good angular stability are demonstrated both numerically as well as through experimental validations, thus proving the applicability of the proposed absorber sensor in low-frequency sensing applications.

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Section: Introductionmentioning

confidence: 99%

Fractal Metamaterial Surfaces for UHF Sensing Applications

Venneri,

Costanzo,

Borgia

et al. 2024

IEEE Access

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“…In recent years, in the microwave field, electromagnetic metamaterials can be composed of varactor diodes/ PIN diodes, [14][15][16][17] and their electromagnetic properties can be adjusted by applying a voltage to the diodes. Xu et al 18 embed PIN diodes within a metamaterial to implement a switchable metamaterial reflector/absorber.…”

Section: Introductionmentioning

confidence: 99%

C, X, and Ku three‐band tunable metamaterial absorber based on varactor diodes

Jiang

Liang

et al. 2022

Micro & Optical Tech Letters

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A three-band tunable polarization-insensitive metamaterial absorber is proposed in this paper. The unit cell of the absorber is composed of a dielectric substrate, a metal patch, and four varactor diodes welded on the top layer. A simple metal via bias network is designed to facilitate the absorption frequency tuning of the absorber. The simulation results show that when there is no bias voltage (0 V), the proposed absorber has three absorption peaks of 88%, 99.5%, and 99.8% under normal incidence at 7.27, 10.93, and 15.84 GHz, respectively. Furthermore, by adjusting the reverse bias voltage (0-19 V) of the varactor, the first absorption peak of the absorber can be tuned from 7.27 to 8.2 GHz and the second absorption peak tuned from 10.93 to 11.4 GHz.Meanwhile, the tuning range for the third absorption peak is 15.84-16.1 GHz. Furthermore, the three-band absorption and frequency tunable characteristics of the absorber are confirmed by experimental tests.

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Beam‐steering of microstrip antenna using single‐layerFSSbased phase‐shifting surface

Das

Mandal

Lalbakhsh

2021

Int J RF Mic Comp-Aid Eng

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In this article, beam-steering of microstrip antenna (MSA) is demonstrated in a cost-effective manner using a single-layer, low-loss passive frequency selective surface (FSS) based on a phase-shifting surface (PSS). A quasi-periodic spatial PSS is constructed by arranging four rows of eight split-ring resonators (SRR) shaped unit cells having different geometrical parameters but identical dimensions and placed adjacent to each other with a periodicity (p) of 0.18λ, where λ is the wavelength corresponding to the resonant frequency (4.5 GHz) of the fundamental unit cell. The geometrical parameters of the SRRs are tailored to control the surface impedance and the transmission phase across the surface area to reshape the phase front of the transmitted waves. A directive MSA operating at 5.5 GHz, is also designed and integrated with this PSS to demonstrate the beam-steering capability. On rotating/shifting the PSS over the MSA, beam-steering in the elevation plane is accomplished across À30 to +30 without degrading its reflection coefficient characteristics, with a maximum gain of 8.9 dBi. The best antenna performance in terms of beam tilt and gain is achieved when the PSS is vertically placed and fixed above the MSA.The MSA integrated with the non-uniform metasurface exhibits 75% radiation efficiency with a front to back ratio of 55.5 (17.4 dB). A prototype is fabricated and measured as a proof of concept. The measured results are consistent with full-wave simulation results.

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A dual‐function switchable and frequency tunable active frequency selective surface

Cited by 3 publications

References 25 publications

Fractal Metamaterial Surfaces for UHF Sensing Applications

Fractal Metamaterial Surfaces for UHF Sensing Applications

C, X, and Ku three‐band tunable metamaterial absorber based on varactor diodes

Beam‐steering of microstrip antenna using single‐layerFSSbased phase‐shifting surface

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