A5035662364- Advanced Antenna and Metasurface Technologies
- Antenna Design and Analysis
- Metamaterials and Metasurfaces Applications
- Microwave Engineering and Waveguides
- Structural Analysis and Optimization
- Advanced Materials and Mechanics
- Geological Modeling and Analysis
- Plasmonic and Surface Plasmon Research
- Architecture and Computational Design
- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Silicone and Siloxane Chemistry
Instituto Federal de Educação Ciência e Tecnologia da Paraíba
2015-2022
Instituto Federal de Educação, Ciência e Tecnologia do Pará
2019-2022
This paper describes by the first time, at least of authors' knowledge, a frequency selective surface, FSS, based on Matryoshka geometry, with dual-band band-pass response, keeping interesting features previously outlined: angular stability and polarization independence. Moreover, it is single layer FSS reduction resonant frequencies, characteristic was maintained. Initial design equations are proposed, providing good results, making easy for other frequencies specific applications. Two were...
A Defected Ground Structure, DGS, based on matryoshka geometry is described in this paper. The proposed DGS outlined and initial design equations are presented. Four prototypes, with resonant frequencies 2.17 GHz, 2.44 2.99 GHz 3.73 were designed, fabricated characterized, observing a good agreement between measured numerical results. Also, the obtained results demonstrated usefulness. behavior was analyzed terms of current density it possible to observe blocked at frequency. When compared...
This work addresses the synthesis of a multi-band frequency selective surface (FSS) through bioinspired computing and general regression neural network (GRNN). hybrid computational method, which utilizes multi-objective cuckoo search algorithm combined to GRNN, determine best physical dimensions FSS in order achieve filtering at 2.4, 3.5 5.8 GHz spectrums. Therefore, results are be applied aid propagation Wi-Fi, WLAN, WiMAX future sub-6 5G systems. The resonant frequencies were measured -10...
The design of a plastic optical fiber-based surface plasmon resonance biochip has been developed and their theoretical experimental aspects are presented here. Multilayer Fresnel equations combined with an available database used to verify the SPR effect over different metal thin film substrate materials, considering sensor immersed in aqueous solution. Also, preparation cladding removing discussed. Only angular interrogation mode observed finally setup proposed.
A modeling of the resonant behavior a continuously reconfigurable frequency selective surface, FSS, is described in this paper. The FSS based on four arms star geometry and its reconfigurability achieved by use varactors. varactor principles are explained. Considering available set measured or numerical data, with responses for different capacitance values, equivalent circuit stablished. Then, effect included can be easily determined. After stablished, applied even varactor. In order to...
This work presents a Frequency Selective Surface (FSS) based on fractal geometry for radar systems applications. The third iteration of Sierpinski curve is used to design the FSS. has space-filling propriety miniaturize device dualpolarized behavior and two stop-band response at 1.82 GHz 4.79 GHz, which are suitable interference protection L C bands signals filtered avoiding eventual adjacent S band frequency. Additionally, an investigation performed different polarized wave incidence....
A reconfigurable frequency selective surface, FSS, associating cross dipoles and matryoshka geometries is described in this paper. The proposed FSS uses as active element PIN diodes. With the associated geometries, three resonant frequencies are achieved, two fixed, related to geometry, one that can be activated or not, geometry. Differently from previous works, an inductor was inserted into dipoles' horizontal arms, maintaining its resonance for x polarization. diode vertical arms controls...
The development of a polarization independent triple-band frequency selective surface, FSS, is described in this paper. This FSS achieved combining two geometries, cross-dipoles and matryoshka, which makes it possible to maintain the resonant frequencies each geometry. Initial design equations are proposed for geometry, with very good agreement when compared numerical measured results. A prototype was fabricated characterized numerically experimentally, considering incidence angles 0°, 15°,...