A5053198284- Electromagnetic Scattering and Analysis
- Electromagnetic Simulation and Numerical Methods
- Antenna Design and Analysis
- Microwave Imaging and Scattering Analysis
- Antenna Design and Optimization
- Advanced Antenna and Metasurface Technologies
- Electromagnetic Compatibility and Measurements
- Numerical methods in engineering
- Wireless Body Area Networks
- Geophysical Methods and Applications
- Microwave Engineering and Waveguides
- Microwave and Dielectric Measurement Techniques
- Ultrasound Imaging and Elastography
- Ultrasonics and Acoustic Wave Propagation
- Soil Moisture and Remote Sensing
- Electromagnetic Compatibility and Noise Suppression
- Advanced Numerical Methods in Computational Mathematics
- Indoor and Outdoor Localization Technologies
- RFID technology advancements
- Advanced Chemical Sensor Technologies
- Energy Harvesting in Wireless Networks
- Photoacoustic and Ultrasonic Imaging
- Matrix Theory and Algorithms
- Spectroscopy and Chemometric Analyses
- Ultrasound and Hyperthermia Applications
Polytechnic University of Turin
2016-2025
The Ohio State University
2023-2024
National Technical University of Athens
2022-2024
University of Illinois Chicago
2018-2022
Octane Wireless (United States)
2022
Institute for Mobile and Satellite Communication Technology
2019
Hong Kong Metropolitan University
2019
Istituto Superiore Mario Boella
2009-2013
Oxford Instruments (United Kingdom)
2008
University of Turin
2006
This paper presents the design of a novel low-complexity microwave imaging system for monitoring brain stroke. In particular, is concerned with determination optimal layout antennas array, namely, minimum number, positions, and polarization radiating elements, enabling acquisition an amount data such to assure reliable imaging. goal achieved by adopting rigorous procedure based on inspection singular value decomposition relevant discretized scattering operator taking into account actual...
This work focuses on brain stroke imaging via microwave technology. In particular, the open issue of monitoring patients after onset is addressed here in order to provide clinicians with a tool control effectiveness administered therapies during follow-up period. this paper, novel prototype presented and characterized. The device based low-complexity architecture which makes use minimum number properly positioned designed antennas placed helmet. It exploits differential approach provides 3D...
Contamination with foreign objects is one of the main causes customers? complaints against food manufacturers. Although different technologies are used for and beverage inline monitoring, cases contaminated products still reach market, many which involve plastic glass fragments. In this article, we propose use a microwave imaging (MWI) technology to monitor packaged foods along production lines. framework, MWI exploits differences in dielectric properties between contaminant as well faulty...
This work presents the outcomes of a numerical analysis based on 3-D high fidelity model realistic microwave imaging system for clinical follow-up brain stroke. The is meant as preliminary step towards full experimental characterization system, with aim assessing achievable results and highlight possible critical points. consists an array twenty-four printed monopole antennas, placed conformal to upper part head; each immersed into semi-solid dielectric brick custom permittivity, acting...
This paper presents the experimental validation of a microwave imaging system for real-time monitoring brain stroke in post-acute stage. The exploits low-complexity sensing apparatus and multi-frequency algorithm with novel artifact removal feature. Phantoms homogeneous anthropomorphic head an ellipsoidal non-static mimicking target, varying gradually from 0 cm3 to 60 cm3, are employed experiments. phantom evolving target filled appropriate alcohol-based mixtures mimic different dielectric...
We describe a novel basis of hierarchical, multiscale functions that are linear combinations standard Rao-Wilton-Glisson (RWG) functions. When the is used for discretizing electric field integral equation (EFIE) PEC objects it gives rise to system immune from low-frequency breakdown, and well conditioned dense meshes. The proposed scheme can be applied any mesh with triangular facets, therefore as if were an algebraic preconditioner. properties new confirmed by numerical results show fast...
We propose a method to significantly improve the spectral properties of EFIE MoM matrix for broad-band analysis structures with fine details, non-uniform meshes, and large overall sizes. A multilevel approach allows overlay meshes quasi-Nyquist sampled meshes; fine-mesh conditioning is solved via hierarchical basis functions, part treated by an algebraic incomplete LU preconditioner. Numerical results show effectiveness several realistic sizes ten/twenty wavelengths levels detail from very...
We present a domain decomposition (DD) framework for the analysis of impenetrable structures; it allows electric field integral equation (EFIE) and combined (CFIE), open, closed, open-closed structures. The DD results in an effective preconditioner large complex problems exploiting iterative solution fast factorizations. employs specialized transmission conditions among domains, use discontinuous Galerkin (DG) conformal as well nonconformal discretizations boundaries; nature gives...
Fully numerical schemes are presented for high precision computations of the four-dimensional integrals arising in Galerkin surface integral equation formulations. More specifically, focal point this paper is singular coincident, edge adjacent and vertex planar curvilinear triangular elements. The proposed method, dubbed as DIRECTFN, utilizes a series variable transformations, able to cancel both weak (1/ <i xmlns:mml="http://www.w3.org/1998/Math/MathML"...
Microwave imaging is an emerging breast cancer diagnostic technique, which aims at complementing already established methods like mammography, magnetic resonance imaging, and ultrasound. It offers two striking advantages: no-risk for the patient potential low-cost national health systems. So far, however, prototypes developed validation in labs clinics used costly lab instruments such as a vector network analyzer (VNA). Moreover, CPU time required by complex image reconstruction algorithms...
The aim of this paper is to present and experimentally verify the first prototype a microwave imaging system specifically designed realized for continuous monitoring patients affected by brain stroke, immediately after its onset diagnosis. device 2D version 3D system, currently under construction, consists an array 12 printed monopole antennas connected two-port vector network analyzer through switching matrix so that each antenna can act as transmitter or receiver, thereby allowing...
In this letter, we describe and validate a microwave antenna designed for an imaging device the diagnosis monitoring of cerebrovascular pathologies. The consists printed monopole immersed in parallelepipedic block semiflexible material with custom-permittivity, which allows to avoid use liquid coupling media enables simple array arrangement. "brick" is built mixture urethane rubber graphite powder. -10 dB frequency band 800 MHz-1.2 GHz, agreement requirements. brick assessed terms power...
This paper experimentally validates the capability of a microwave prototype device to localize hemorrhages and ischemias within brain as well proposes an innovative calibration technique based on measured data. In reported experiments, 3-D human-like head phantom is considered, where represented either with homogeneous liquid mimicking dielectric properties or ex vivo calf brains. The imaging (MWI) system works at 1 GHz, it realized low-complexity architecture formed by array twenty-four...
This paper presents the construction, use, and properties of a multiresolution (wavelet) basis for method moments (MoM) analysis metal antennas, scatterers, microwave circuits discretized by triangular meshes. Several application examples show fast convergence iterative solvers accurate solutions with highly sparse MoM matrices. The proposed is organized in hierarchical levels, keeps different scales problem directly into functions representation; current divided solenoidal...
In this paper, we present a purely numerical procedure to evaluate strongly near-singular integrals involving the gradient of Helmholtz-type potentials for observation points at finite, arbitrarily small distances from source domain. proposed approach domain is subdivided into disc plus truncated subtriangles, and proper variable transformations are applied in each integration exactly cancel kernel singularity. A novel feature angular transform that required discrete values inverse...
We introduce a method to compress the impedance matrix of moments (MoM) for modeling high-fidelity multiscale structures at low- moderate-frequencies. start from recently proposed static (scalar) problems, proved have O(N) computational complexity. represent far coupling between groups through equivalent source distributions on properly defined, automatically generated equivalence surfaces. The sources are obtained via an inverse-source process that enforces radiated fields testing surfaces...
Despite the meticulous attention of food industries to prevent hazards in packaged goods, some contaminants may still elude controls. Indeed, standard methods, like X-rays, metal detectors and near-infrared imaging, cannot detect low-density materials. Microwave sensing is an alternative method that, combined with machine learning classifiers, can tackle these deficiencies. In this paper we present a design methodology applied case study sector. Specifically, offer complete flow from...
The detection of contaminants in food products after packaging by a non-invasive technique is serious need for companies operating the industry. In recent years, many technologies have been investigated and developed to overcome intrinsic drawbacks currently employed techniques, such as X-rays metal detector, offer more appropriate solutions with respect techniques academic domain terms acquisition speed, cost, penetration depth (infrared, hyperspectral imaging). A new method based on MW...
To detect contaminants accidentally included in packaged foods, food industries use an array of systems ranging from metal detectors to X-ray imagers. Low density plastic or glass contaminants, however, are not easily detected with standard methods. If the dielectric contrast between and these microwave spectrum is sensible, Microwave Sensing (MWS) can be used as a contactless detection method, which particularly useful when already packaged. In this paper we propose using MWS combined...
A multiresolution (MR) basis is described for the method of moments (MoM) analysis a generic 3-D conductor discretized with triangular cells. The MR functions are constructed as linear combination Rao-Wilton-Glisson (RWG) functions, thus allowing direct applicability on existing MoM codes. With respect to previous work by authors, generation significantly simplified, yet keeping similar and performance, in terms conditioning matrix, convergence iterative solvers, possibility sparsifying...
We present an EFIE fast solver that is stable down to very low frequencies, for dense meshes and multi-scale problems. The proposed approach uses a split-potentials formulation in association hierarchic pre-conditioner the underlying low-rank factorization. Potential splitting prevents numerical cancellation problem undermines effectiveness of factorization, negatively impacting on necessary factorization tolerance. method presented this work can be directly implemented into existing codes.