A5051657485- Soil Moisture and Remote Sensing
- Advanced Antenna and Metasurface Technologies
- Electromagnetic wave absorption materials
- Microwave Engineering and Waveguides
- Geophysical Methods and Applications
- Graphene research and applications
- Microwave and Dielectric Measurement Techniques
- Antenna Design and Analysis
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Carbon Nanotubes in Composites
- Electromagnetic Scattering and Analysis
- Precipitation Measurement and Analysis
- Photonic and Optical Devices
- Advanced Sensor and Energy Harvesting Materials
- Fiber-reinforced polymer composites
- Electromagnetic Compatibility and Noise Suppression
- Electromagnetic Compatibility and Measurements
- Soil Geostatistics and Mapping
- Advanced Energy Technologies and Civil Engineering Innovations
- Dielectric materials and actuators
- Graphene and Nanomaterials Applications
- Molecular Junctions and Nanostructures
- Antenna Design and Optimization
- Metamaterials and Metasurfaces Applications
- Electrochemical sensors and biosensors
Polytechnic University of Turin
2015-2024
Oldenburger Institut für Informatik
2023
Institute of Nanostructured Materials
2023
University of Wisconsin–Milwaukee
2021
Turin Polytechnic University
2019
Telecom Italia Lab
2017
University of Turin
2007
National Research Council
1997-2000
In recent years, low-cost carbons derived from recycled materials have been gaining attention for their potentials as filler in composites and other applications. The electrical mechanical properties of polymer can be tuned using different percentages kind fillers: either (e.g., carbon black), ecofriendly biochar), or sophisticated nanotubes). this work, the behavior with biochar multiwall nanotubes dispersed epoxy resin are compared. Superior (ultimate tensile strength, strain at break)...
Global navigation satellite system (GNSS)-reflectometry is a type of remote sensing technology and can be applied to soil moisture retrieval. Until now, various GNSS-R retrieval methods have been reported. However, there still exist some problems due the complexity modeling process, as well extreme uncertainty experimental environment equipment. To investigate behavior bistatic two ground-truth measurements with different conditions were carried out performance input variables was analyzed...
A method for the synthesis of optical filters consisting a cascade N-coupled rings is presented. The procedure based on definition polynomial whose roots are zeros channel-dropping transmittance characteristic and provides directly ring electrical lengths mutual coupling coefficients. design example Chebyshev-type 6-ring bandpass filter
This letter presents a voltage-controlled tunable planar antenna based on few-layer graphene flakes. The consists of rectangular patch with shorted microstrip stub connected to the radiating edge, and pad located at input stub. proposed design exploits variation resistance by an applied bias voltage. Without any voltage, behaves almost as open circuit, not allowing current passing and, thus, voiding impact Increasing voltage reduces resistance, thus increasing through into results in...
Global navigation satellite system-reflectometry (GNSS-R) can retrieve Earth's surface parameters, such as soil moisture (SM) using the reflected signals from GNSS constellations with advantages of noncontact, all-weather, real-time, and continuity, particularly space-borne cyclone (CYGNSS) mission. However, accuracy efficiency SM estimation CYGNSS still need to improve. In this article, global is estimated machine learning (ML) regression aided by a preclassification strategy. The total...
There has been a great interest in the development of high-altitude platforms, which are low cost stratospheric aircraft carrying payloads tailored for wide range applications telecommunications and remote sensing. These platforms capable flying at altitudes ranging between 17 30 km, with potential endurance weeks to months, features that make them attractive provision future personal communication services. This paper deals theoretical derivation channel model link platform terrestrial...
In the ongoing search for new materials microwave absorption applications, Carbon Nanotubes deserve a special consideration due to their outstanding properties. this paper, absorbing properties of epoxy resin based composites containing commercial Multi Walled used as flllers have been analyzed. The complex permittivity was measured in wide frequency band (3{18GHz). single-layer absorber backed by metallic plate considering several concentration CNTs simulated taking into account permittivity.
The response of materials to impinging electromagnetic waves is mainly determined by their dielectric (complex permittivity) and magnetic permeability). In particular, radar absorbing are characterized high complex permittivity (and eventually large values permeability), Indeed, energy dissipation relaxation carrier conduction principally responsible for diminishing microwave radiation reflection transmission in non-magnetic materials. Therefore, the scientific technological community has...
Global Navigation Satellite System-Reflectometry (GNSS-R) as a microwave remote sensing technique can retrieve the Earth’s surface parameters using GNSS reflected signal from surface. These signals convey features and therefore be utilized to detect certain physical properties of reflecting such soil moisture content (SMC). Up now, serial electromagnetic models (e.g., bistatic radar Fresnel equations, etc.) are employed solved for SMC retrieval. However, due uncertainty characteristics...
Estimating the characteristics of soil surface represents a significant area in applications such as hydrology, climatology, and agriculture. Signals transmitted from Global Navigation Satellite Systems (GNSSs) can be used for monitoring after reflection Earth's surface. In this paper, feasibility obtaining power ratio left-hand (LH) reflected signal-to-noise (SNR) over direct right-hand (RH) is investigated. The analysis was done regardless roughness incoherent components power. First,...
Ever-increasing proportions of sewage sludge are being generated due to increases in population and urbanization. As a result, the disposal for use as manure other agricultural applications is not sufficient. The biochar derived from substitute carbon fillers was analyzed by performing electrical morphological characterization. microwave characterization composites filled with performed. Thermal annealing makes it conductive suitable variety applications. Composite samples thickness 4 mm 20...
The estimation of soil moisture (SM) utilizing the data from Cyclone Global Navigation Satellite System (CYGNSS) has attracted significant interest in recent times. However, CYGNSS' inherent capability variable resolution not been fully exploited, often resulting a loss detailed spatial information raw data. In this paper, novel downscaling scheme tailored for CYGNSS is introduced to yield "self-adjusting adaptive resolution" SM product, which dynamically varies estimates based on available...
Abstract In today's fast‐paced and well‐connected world, consumer electronics are evolving rapidly. As a result, the amount of discarded electronic devices is becoming major health environmental concern. The rapid expansion flexible has potential to transform from rigid phones tablets robust wearable devices. This means increased use plastics in generate more persistent plastic waste for environment. Hence, today, need biodegradable at forefront minimizing mounting pile global waste. A...
LoRa is a relatively new proprietary communication technology that allows long-range distances while consuming very little power. It utilizes license-free Industrial, Scientific and Medical ISM frequency bands to exchange information at low data rates. favourable when looking for limited of low-cost devices infrastructure. This work presents some preliminary propagation measurements in typical urban environment by using prototype transmitters receivers working private network. Results...
Biochar (bio-charcoal) is a low-cost and eco-friendly material. It can be obtained by thermochemical conversion of different biomass sources, for example, in the total absence oxygen (pyrolysis) or oxygen-limited atmosphere (gasification). The porous carbonaceous structure biochar, resulting from thermal treatment, exploited cement-based composite production. By introducing biochar powder other fillers cement paste, it possible to enhance shielding properties paste. environmental impact...
This paper describes the approach developed in order to model electromagnetic response of a cable bundle, part electrical wiring interconnection system real aircraft, submitted an external excitation. The aim this study is highlight main challenges synthetic modeling and validation fully setup, from compatibility point view. Both conducted radiated excitations have been considered global model. solution obtained through cooperative simulation involving one 3-D full-wave solver multiconductor...
The partial substitution of non-renewable materials in cementitious composites with eco-friendly is promising not only terms cost reduction, but also improving the composites’ shielding properties. water and carbon content a commercial lignin-based biochar analyzed thermal gravimetric analysis. Cementitious composite samples 14 wt.% 18 are realized. Good dispersion filler observed by SEM fabricated order to fit rectangular waveguide for measurements effectiveness X-band. A 15 dB was obtained...
A synthesis procedure, based on a distributed parameter model, for the design of microwave filters is presented in this paper. The frequency response filter described terms characteristic polynomial T/sub 21/=S/sub 11//S/sub 21/ where S/sub 11/ and are scattering parameters filter. Starting from desired 21/, scheme directly yields various junctions, which can be realized by any kind discontinuity. capability synthesizing an arbitrary allows one to introduce concept "predistorted" order...
A wide-band microwave characterization of nanocomposites based on commercial multiwalled carbon nanotubes (MWCNTs) and epoxy resin is presented. The sample preparation method discussed in detail. Field emission scanning electron microscopy used for morphological analysis MWCNTs. complex permittivity measured a wide frequency band (3 to 18 GHz) using dielectric probe (Agilent 85070D) network analyzer (E8361A). statistical one-way variance (ANOVA) technique performed. aim this investigate the...
Global Navigation Satellite System reflectometry (GNSS-R) is an emerging technique used for the remote sensing of soil surfaces. In this work, a bistatic radar equation method was implemented moisture using GNSS-R. Both direct and reflected GPS signals were collected by fully software receiver mounted onboard aircraft. The signal processed with open loop approach, obtaining delay-Doppler maps (DDMs) corresponding delay waveforms. Signal to noise ratio (SNR) time series estimated from...
In the ongoing search for new materials microwave absorption applications, carbon nanotubes (CNTs) deserve a special consideration due to their outstanding properties. this paper, absorbing properties of epoxy resin based composites containing three different types commercial Multi Walled Carbon Nanotubes (MWCNTs) used as fillers have been analyzed. The complex permittivity has experimentally determined. These data were simulate in frequency band 3-18 GHz single-layer absorber backed by...