A5083107459- Microwave Engineering and Waveguides
- Antenna Design and Analysis
- Advanced Antenna and Metasurface Technologies
- Antenna Design and Optimization
- Wireless Body Area Networks
- Energy Harvesting in Wireless Networks
- Millimeter-Wave Propagation and Modeling
- Electromagnetic Simulation and Numerical Methods
- Electromagnetic Scattering and Analysis
- Electromagnetic Compatibility and Noise Suppression
- Electromagnetic Compatibility and Measurements
- Photonic and Optical Devices
- Soil Moisture and Remote Sensing
- RFID technology advancements
- Microwave and Dielectric Measurement Techniques
- Microwave Imaging and Scattering Analysis
- Radio Astronomy Observations and Technology
- Gyrotron and Vacuum Electronics Research
- Magnetic and Electromagnetic Effects
- Calcium Carbonate Crystallization and Inhibition
- Plant Disease Management Techniques
- Bone Tissue Engineering Materials
- Ultrasound and Hyperthermia Applications
- Advanced Chemical Sensor Technologies
- Advanced Materials and Mechanics
University of Cagliari
2015-2024
Consorzio Nazionale Interuniversitario per le Telecomunicazioni
2023-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari
2019-2022
ORCID
2022
Italian Institute of Technology
2021
University of Catania
2021
National Research Council
2021
University of Pavia
2021
University of Pisa
2016
University of Naples Federico II
1984-2003
The antenna pattern synthesis problem is of the utmost importance in almost every kind applications. Therefore, a very large number contributions have appeared on this subject. But virtually all them deal with simplified versions complete problem, wherein degrees freedom available principle are strongly reduced, and/or idealized design criteria or requirements considered. In paper we present formulation which allows us to overcome fragmentation problem. A clear and direct description...
Due to space or cost reasons, a single array antenna can be required radiate more than one pattern, each pattern being selected by an electronic control, in which only the phase modified. A synthesis method for such problem that is able determine both common amplitude and various phases integrated way presented. Moreover, approach flexible enough take into account additional constraints allows efficient implementation. Some test cases showing effectiveness of are presented.< <ETX...
A new antenna, designed on a polyethylene terephthalate (PET) substrate and implemented by inkjet printing using conductive ink, is proposed as passive tag antenna for UHF radio frequency identification (RFID). The operating bandwidth of the very large since it encompasses all worldwide RFID bands extends well beyond at both edges. Moreover, has simple geometry, can be easily tuned to feed many commercial chips, robust with respect realization tolerances. been general-purpose 3-D...
A printed Log-periodic dipole array (LPDA) is presented, operating over the C, X and Ku bands. The antenna feeding structure consists of two coaxial cables, in order to realize an inflnite balun which provides required broadband input matching. second cable mirrors flrst one, connected input, capable both stabilizing phase center improving radiation pattern. has been designed using CST Microwave Studio, with useful frequency range 4{18GHz. Moreover, simulated measured results show that...
Microstrip patch antennas are widely employed in several applications, thanks to their low profile, cost, and easy manufacturing. However, the demand for new technologies providing compactness high performance poses a long-lasting challenge antenna designer. Traditional methods bandwidth improvement size reduction have some drawbacks, tied mostly poor radiation or troublesome implementation. In this letter, novel, simple, but effective layout exploiting customizable form factor guaranteed by...
A new methodology to estimate the growth stages of agricultural crops using time series polarimetric synthetic aperture radar (PolSAR) images is proposed. The based on complex Wishart classifier and both phenological intervals training areas are identified measuring distances among covariance matrices obtained from PolSAR data. Consequently, computation features, which main step state-of-the-art methods, no longer needed, proposed approach can be applied in same way any crop type....
The robustness of wearable UHF-band planar inverted-F antennas (PIFAs), with respect to body-antenna separation and human tissue dispersion, is addressed through numerical investigations. main goal gaining physical insights into the relationship between grounded antenna performance distribution electric magnetic energy densities in near-field region close ground plane border. A criterion for choosing a proper shape suggested, which can improve random variations coupling scenario, but minimal...
We present a new waveguide slot configuration able to radiate circular polarization with very low axial ratio. This is mainly intended as circularly polarized radiating element be used in an array. Both left-hand and right-hand can independently obtained therefore this could realize agile antenna. The proposed consists of two closely spaced slots, so specialized method moments code has been developed analyze, effective way, the near-field interaction between such slots. Our validated against...
A printed log-periodic dipole array (LPDA), operating between 3 and 6 GHz fed with a coplanar waveguide, is presented. The antenna has been designed starting from Carrel's theory, optimized using CST Microwave Studio 2012, then realized. comparison simulated measured results shows that the proposed can be used for broadband applications in whole frequency band (3-6 GHz), very good input matching satisfactory endfire radiation pattern.
A single-layer substrate integrated waveguide slot array is presented for use in low sidelobe applications. compact three-level power divider developed to provide the required phase distribution and enhanced co-phase bandwidth. Then, Elliott's design procedure employed taking accurately into account both external coupling high-order mode internal coupling. The measured radiation pattern frequency response are very good agreement with specifications simulated results provided by CST Microwave...
The robustness of wearable antennas to the human body proximity can be improved by properly placing radiating element over a ground plane, or shaping on basis antenna electric and magnetic energy density distributions, aiming confine in specific regions far from border. effectiveness above design criterion has been assessed through both numerical analysis experimental measurements, optimizing position grounded ultrahigh frequency radio identification tag operating at ETSI band (865-868 MHz),...
This work copes with the design and implementation of a wireless sensors network architecture to automatically continuously monitor, for first time, manufacturing process Sardinian Carasau bread. The case traditional bakery company facing challenge Food-Industry 4.0 competitiveness is investigated. was analyzed identify most relevant variables be monitored during product manufacturing. Then, heterogeneous, multi-tier designed realized allow real-time control data collection critical steps...
To avoid high recurrence rate, the hyperthermia treatment (HT) of bone tumors after surgical intervention was investigated. Innovative magnetic biomaterials can be used as thermoseeds to perform local thermal therapy. This work copes with multiphysic modeling HT residual Osteosarcoma (OS) cells using so-called scaffolds. The goal is develop a model that serve tool plan an accurate, safe, and high-quality treatment. Therefore, electromagneto-thermal problem radio-frequency heating solved...
Magnetic tissue scaffolds are a promising powerful tool for performing interstitial tumor hyperthermia against the residual bone cancer cells, after surgical intervention. The design of implant architecture is crucial several biomedical requirements. However, to date, influence topology on treatment outcome has never been assessed. Furthermore, heating ability function sample mass and geometry. In this work, simple methodology designing biomimetic using triply periodic minimal surfaces...
The Elliott's procedure for the design of planar waveguide arrays longitudinal slots has been extended to cylindrical conformal case. presented devised deal with most general case a substrate integrated (SIW) slot array dielectric cover. Both external and internal mutual coupling have accurately effectively taken into account. results synthesis validated using both Ansys HFSS simulations experimental results, showing good agreement specifications.
This works claims to define, via numerical simulations, magnetic field parameters perform an effective <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">in situ</i> bone tumor hyperthermia treatment using scaffolds. A Cole-Cole model describe the frequency response of susceptibility nanoparticles embedded in novel biomaterials is explored. The heating phenomenon investigated, considering both ischemic and inflamed state fracture gap at...
Recently developed superparamagnetic scaffolds for bone tissue engineering are still a complex object to deal with. Thanks the possibility of controlling them remotely and directing therapeutic action in non-invasive way, this work deals with necessity clear definition quantification field gradient, forces velocity it could exert on magnetic nanocarriers static field, heat power generated when time-varying is applied, better defining frequency response nanoparticles entrapped solid matrix.
The Sardinia Radio Telescope (SRT) is a 64-m, fully-steerable single-dish radio telescope that was recently commissioned both technically and scientifically with regard to the basic observing modes. In order improve scientific capability cover all requirements for an advanced telescope, we developed SArdinia Roach2-based Digital Architecture Astronomy (SARDARA), wide-band, multi-feed, general-purpose, reconfigurable digital platform, whose preliminary setup used in early science program of...
Magnetic scaffolds have been investigated as promising tools for the interstitial hyperthermia treatment of bone cancers, to control local recurrence by enhancing radio- and chemotherapy effectiveness. The potential magnetic motivates development production strategies enabling tunability resulting properties. Within this framework, deposition drop-casting nanoparticles on suitable offer advantages such ease high loading, although these approaches are often associated with a non-uniform final...
Magnetic scaffolds (MagSs) are magneto-responsive devices obtained by the combination of traditional biomaterials (e.g., polymers, bioceramics, and bioglasses) magnetic nanoparticles. This work analyzes literature about MagSs used as drug delivery systems for tissue repair cancer treatment. These can be innovative drugs and/or biomolecules systems. Through application a static or dynamic stimulus, trigger release in controlled remote way. However, most not optimized properly modeled, causing...
An improved synthesis procedure is presented in this letter for the design of waveguide slot arrays directly integrated on substrate exciting microstrip line. To take into account smallness height, standard shunt-admittance model usually adopted single radiating properly modified an T-network model. Accordingly to choice, a two-step developed accurately determine slots' parameters. Experimental validations are discussed 8-GHz linear array with <formula formulatype="inline"...
We propose an effective and accurate analysis technique based on the method of moments (MoM) for characterization a longitudinal slot with short truncated waveguide above it. This antenna has been used in recent literature as radiating element large arrays. focus our attention some features applications this configuration which have not taken into account previous works. Then, we discuss need tailored, linking properties proposed to its circuital according Elliott's model. task is easy by...
The Elliott’s procedure for the design of a pencil beam waveguide longitudinal slot array has been generalized to encompass shaped planar arrays. An extended set equations, taking into account in an operative way feeding part array, devised. From this general and effective up, shedding light on constraints posed by complex aperture distribution. results proposed synthesis have validated through comparison with commercial FEM software.
Agriculture is facing the challenge of increasing quality food production with environmentally friendly and health compatible processes featuring limited use chemicals. The elimination pathogens harmful biological agents still remains a fundamental requirement. Therefore, soil physical disinfestation disinfection represent promising approach to sustainable profitable agriculture. For this reason, cheap selective method based on microwave power proposed. Microwave and, consequently,...
This work deals with the electromagnetic characterization of Carasau bread doughs, in microwave range region. The microstructure, texture, product quality and dielectric properties were investigated, jointly a thorough thermogravimetric analysis. goal is to link physical process variables. variation during dough leavening studied. raw materials (water, yeast, salt semolina) measured from 500 MHz 8.5 GHz. Given heterogeneous character possibility predicting by using mixing formula final...