A5057847383- Antenna Design and Analysis
- Microwave Engineering and Waveguides
- Advanced Antenna and Metasurface Technologies
- Energy Harvesting in Wireless Networks
- High voltage insulation and dielectric phenomena
- RFID technology advancements
- Wireless Body Area Networks
- Electrostatic Discharge in Electronics
- Bluetooth and Wireless Communication Technologies
- Electromagnetic Compatibility and Noise Suppression
- Power Transformer Diagnostics and Insulation
- Advanced Materials and Mechanics
- Ultra-Wideband Communications Technology
- Power Line Communications and Noise
- Microwave and Dielectric Measurement Techniques
- Antenna Design and Optimization
- Gyrotron and Vacuum Electronics Research
- Radio Astronomy Observations and Technology
- Millimeter-Wave Propagation and Modeling
- Metamaterials and Metasurfaces Applications
- Lightning and Electromagnetic Phenomena
- Radio Frequency Integrated Circuit Design
- Electrical Fault Detection and Protection
- Education and Digital Technologies
- Electromagnetic Scattering and Analysis
Universidade Federal de Campina Grande
2016-2025
Universidade Federal de Sergipe
2024
University of Huddersfield
2024
Instituto Federal de Educação, Ciência e Tecnologia do Pará
2020
Instituto Federal de Educação Ciência e Tecnologia da Paraíba
2020
Laboratoire de Conception et d'Intégration des Systèmes
2005-2012
Faculdades Guarulhos
2010
In this paper, the design and application of a circular microstrip antenna for partial discharge detection is presented. For purpose, truncated ground plane technique was applied bandwidth enhancement. addition, aiming at an optimized structure, computational simulations with several combinations dimensional parameters were performed. order to verify whether developed met prerequisites (bandwidth gain) practical in detection, subjected tests anechoic chamber. Finally, sensitivity compared...
A new, bio-inspired printed monopole antenna (PMA) model is applied to monitor partial discharge (PD) activity in high voltage insulating systems. An optimized sensor was obtained by designing a PMA accordance with the characteristics of electromagnetic signal produced PD. ultra-wideband (UWB) applying truncated ground plane technique. The patch geometry that Inga Marginata leaf, resulting significant reduction size. To verify operating frequency and gain PMA, measurements were carried out...
In this paper, the design and development of a bio-inspired UHF sensor for partial discharge detection in power transformers is presented. The was developed external use dielectric windows transformers. For purpose, microstrip antenna designed with radiating element shape based on leaf Jatropha mollissima (Pohl) Baill plant. Then, an epoxy coating aluminium enclosure were to protect against corrosion provide mechanical support, noise immunity, lifetime compatibility order verify electrical...
Abstract In this study, we developed a Radio Frequency Identification (RFID) sensor to monitor respiratory rates. The utilizes passive RFID tag enhanced with metamaterial-inspired structure boost its maximum gain value. This increased from -0.39 dBi 0.57 dBi. Monitoring of the rate was conducted by analyzing variations in Received Signal Strength Indicator (RSSI), which were influenced movements. RSSI data collected readings processed using Daubechies wavelet order 5 (db5) three levels...
ABSTRACT Wearable antennas present flexible dielectric and microstrip antenna normally used in Wireless Body Area Network systems with medical no‐medical applications. This article presents a new wearable printed monopole for second generation (2G), third (3G), fourth (4G) on textile material laminate cooper to flat cable. The bioinspired geometry of gynkgo biloba leaf was generated by Gielis formula. proposed bandwidth 2.70 GHz, covering the ranges 2G, 3G, 4G systems, an omnidirectional...
In this paper, a biologically inspired design methodology to develop directional leaf-shaped printed monopole antennas (PMA) for applications in the fourth-generation (4G) of mobile telecommunications technology is presented. Bio-inspired leaf shapes sugar cane plant, compact PMA are designed (with partial ground planes and flat rectangular reflectors) cover Brazilian 4G 700 MHz regulated band (698–806 MHz), with broadside radiation patterns maximum directive gain up 7.7 dBi. Simulated...
The adaptation of dielectric windows as metamaterial superstrate over a bio-inspired Printed Monopole Antenna (PMA) was evaluated in order to improve the detection sensitivity Ultra High Frequency (UHF) sensors designed for Partial Discharge (PD) measurement. For this purpose, rectangular and circular Split Ring Resonators (SRR) structures were aiming achieve that improves characteristics PMA gain, bandwidth, radiation pattern. Measurements with carried out an anechoic chamber compared...
In this article, it is provided a comprehensive survey on the most relevant research in area of detection, classification and location partial discharge (PD) sources using radiometric or ultra high frequency (UHF) method, focusing mainly works related to use antennas. To best authors knowledge, first review paper that focuses application antennas based UHF method complete diagnosis PD. Specifically, presented main contributions development optimization sensors for detection PD sources....
This paper presents an algorithm for the localisation of partial discharge (PD) sourcesin power transformers based on electromagnetic waves radiated by a PD pulse. The proposedalgorithm is more accurate than existing methods, since it considers effects reflection,refractions and diffractions undergone ultra-high frequency (UHF) signal within equipmenttank. proposed method uses computational simulations generatedby PD, obtains time delay between each point in 3D space UHFsensors. calculated...
This paper discusses the application of first peak and cumulative energy methods to calculate time difference arrival (TDOA) UHF signals emitted by a partial discharge source in order locate it. We used $200\times 200\times97$ cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> dimensional arrangement composed four printed monopole antennas, which was bio-inspired Jatropha mollissima (Pohl) Baill leaf. In addition, an oil cell pair...
The measurement of diffuse 21-cm radiation from the hyperfine transition neutral hydrogen (HI signal) in different redshifts is an important tool for modern cosmology. However, detecting this faint signal with non-cryogenic receivers single-dish telescopes a challenging task. BINGO (Baryon Acoustic Oscillations Integrated Neutral Gas Observations) radio telescope instrument designed to detect baryonic acoustic oscillations (BAOs) cosmological HI signal, redshift interval $0.127 \le z 0.449$....
A new compact microwave amplifier structure using an iterative technique based on the wave concept procedure (WCIP) is presented. This multilayer composed of five planar interfaces strip lines. The used to model this provides a mixed resolution in modal and spatial domain. By taking best advantage each domain, lower computing time obtained. purpose paper demonstrate that near field amplification achievable WCIP suitable electromagnetic analysis kind structure. numerical results show 13.4 dB...
A microstrip leaf-shaped printed monopole antenna bioinspired on the Inga marginata leaves is presented in this paper for UWB applications. parametric study of proposed geometry was conducted order to verify their resonant properties. The designed with a rectangular slitted ground plane impedance matching and fabricated inexpensive glass fiber substrate fed by 50 Ω line. Numerical experimental results were obtained. show an bandwidth superior 10.26 GHz, greater than considered (7.5 GHz)....
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...
In this paper is presented a new printed monopole antenna, bio-inspired by jasmine flower, that meets the Federal Communications Commission parameters for ultra-wideband systems. The design of antenna in flower has developed from with circular geometry, comparison results. measured results showed compatibility required FCC technology. It obtained bandwidth 9.75 GHz, half-power beamwidth 148 degrees, omnidirectional radiation pattern, gain 5.99 dBi, power spectral density below -41.3 dBm...
This paper presents a technique for circuit breaker radiometric monitoring using broadband plana monopole antennas (PMA). Considering that this work represents the continuity of previous research, antenna has been miniaturized bioinspired geometry based on <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Acer Macrophyllum</i> leaf. The system consists in measuring signal radiated by electric arcs poles during its switching operations. By...
In this study, a new technique for circuit breaker diagnosis, based on broadband microstrip antennas, is presented. The diagnosis the electromagnetic signals radiated by electric arcs in poles during opening operations. From each measured signal, several parameters are calculated, such as arc duration and signal energy, which then processed statistical analysis routine, providing information that allows correlation between degradation of contacts to be established. A current injection system...
This work presents the development of a reconfigurable frequency selective surface (RFSS) for application in 2400-2483.5 MHz band, standard IEEE 802.11b/g/n (Wi-Fi). The proposed RFSS is based on four-arms star geometry and PIN diodes were used as switching elements. In initial design, numerical measured results, especially y polarization, diode on-state, shown difference 15% resonant frequency. To overcome this drawback, scaling factor was adopted redesigned characterized, achieving desired...
In this work, we developed an RFID (Radio Frequency Identification) sensor to monitor respiratory rate. the passive tag, a metamaterial-inspired structure was used improve its performance, increasing maximum gain value. Respiratory rate monitoring based on variations in Received Signal Strength Indicator (RSSI) obtained by reader due movements. The RSSI data, reading were processed using Daubechies wavelet of order 5 (db5) and considering 3 levels signal decomposition. Less noisy breathing...
This work presents a methodology for the generation and classification of phase resolved partial discharges (PRPD) patterns based on use printed UHF monopole antenna signal con-ditioning circuit to reduce hardware requirements. For this purpose, envelope detection technique was applied. In addition, test objects such as hydrogenerator bar, dielectric disks with internal cavities in an oil cell, potential transformer, tip-tip electrodes immersed were used generate discharge (PD) signals. To...
This work presents a methodology for the generation and classification of phase-resolved partial discharge (PRPD) patterns based on use printed UHF monopole antenna signal conditioning circuit to reduce hardware requirements. For this purpose, envelope detection technique was applied. In addition, test objects such as hydrogenerator bar, dielectric discs with internal cavities in an oil cell, potential transformer tip–tip electrodes immersed were used generate (PD) signals. To detect...