A5065814934- Radio Astronomy Observations and Technology
- Superconducting and THz Device Technology
- Astrophysics and Cosmic Phenomena
- Microwave Engineering and Waveguides
- Gamma-ray bursts and supernovae
- Antenna Design and Optimization
- Antenna Design and Analysis
- Solar and Space Plasma Dynamics
- GNSS positioning and interference
- Satellite Communication Systems
- Galaxies: Formation, Evolution, Phenomena
- Astro and Planetary Science
- Space Satellite Systems and Control
- Geophysics and Gravity Measurements
- Planetary Science and Exploration
- Advanced Antenna and Metasurface Technologies
- Spacecraft Design and Technology
- Ionosphere and magnetosphere dynamics
- Radio Frequency Integrated Circuit Design
- Astronomy and Astrophysical Research
- Astrophysical Phenomena and Observations
- Energy Harvesting in Wireless Networks
- Particle accelerators and beam dynamics
- Pulsars and Gravitational Waves Research
- Astronomical Observations and Instrumentation
Agenzia Spaziale Italiana
2016-2025
Università degli studi di Cassino e del Lazio Meridionale
2020-2025
Osservatorio Astronomico di Cagliari
2010-2024
McMaster University
2023
University of Pavia
2021
Institute of Electrical and Electronics Engineers
2020
National Institute for Astrophysics
2014-2018
London Health Sciences Centre
2018
Western University
2018
Istituti di Ricovero e Cura a Carattere Scientifico
1995-2014
We study the intra-cluster magnetic field in poor galaxy cluster Abell 194 by complementing radio data, at different frequencies, with data optical and X-ray bands. analyze new total intensity polarization observations of obtained Sardinia Radio Telescope (SRT). use SRT combination archival Very Large Array to derive both spectral aging Rotation Measure (RM) images galaxies 3C40A 3C40B embedded 194. The analysis indicates that does not show a major recent merger, but rather agrees scenario...
[Abridged] The Sardinia Radio Telescope (SRT) is the new 64-m dish operated by INAF (Italy). Its active surface will allow us to observe at frequencies of up 116 GHz. At moment, three receivers, one per focal position, have been installed and tested. SRT was officially opened in October 2013, upon completion its technical commissioning phase. In this paper, we provide an overview main science drivers for SRT, describe outcomes from scientific telescope, discuss a set observations...
In the period 2012 June - 2013 October, Sardinia Radio Telescope (SRT) went through technical commissioning phase. The characterization involved three first-light receivers, ranging in frequency between 300MHz and 26GHz, connected to a Total Power back-end. It also tested employed telescope active surface installed main reflector of antenna. instrument status performance proved be good agreement with expectations terms panels alignment (at present 300 um rms improved microwave holography),...
We report the detection of diffuse radio emission which might be connected to a large-scale filament cosmic web covering 8deg x area in sky, likely associated with z~0.1 over-density traced by nine massive galaxy clusters. In this work, we present observations region taken Sardinia Radio Telescope. Two clusters field host powerful halo sustained violent ongoing mergers and provide direct proof intra-cluster magnetic fields. order investigate presence synchrotron beyond complex system,...
Context . Radio loud active galactic nuclei (AGN) are episodic in nature, cycling through periods of activity and quiescence. The study this duty cycle has recently gained new relevance because the importance AGN feedback for galaxy evolution. Aims In work we investigate radio B2 0258+35, which was previously suggested to be a restarted based on its morphology. source consists pair kpc-scale jets embedded two large-scale lobes (∼240 kpc) with relaxed shape very low surface brightness,...
The robustness of wearable UHF-band ungrounded antennas with respect to body-coupling effects is addressed. Two different configurations single-layer antennas, energy density distributions, are presented, and a design criterion improve their performance the antenna-body separation derived. Through an analysis antenna electric magnetic it shown that degradation due proximity human body can be reduced if confined in specific regions far from border. proposed has been validated by numerical...
This study evaluates the validity and measurement invariance of 8-item scales State-Trait Anxiety Inventory (STAI) across gender age. Originally developed by Spielberger (STAI-Y), these have been shortened to create more efficient versions without compromising psychometric robustness. A sample Italian young adults, aged between 18 36 years, completed abbreviated scales. The were assessed for internal consistency, convergent with Endler Multidimensional Scales (EMAS), results demonstrated...
High-sensitivity and large-scale surveys are essential in advancing radio astronomy, enabling detailed exploration of the universe. A Phased Array Feed (PAF) installed focal plane a telescope significantly enhances mapping efficiency by increasing instantaneous Field View (FoV) improving sky sampling capabilities. This paper presents design optimization novel C-Band antenna for Sardinia Radio Telescope (SRT). The system features an 8 × array dual-polarized elements optimized to achieve...
Space debris are orbiting objects that represent a major threat for space operations. The most used countermeasure to face this is, by far, collision avoidance, namely the set of maneuvers allow avoid with debris. Since avoidance is tightly related knowledge state (position and speed), observation orbital key problem. In work bistatic radar configuration named BIRALET (BIstatic RAdar LEO Tracking) detect at 410 MHz, using Sardinia Radio Telescope as receiver antenna. signal-to-noise ratio,...
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...
Context. The Sun is an extraordinary workbench, on which several fundamental astronomical parameters can be measured with high precision. Among these parameters, the solar radius R ⊙ plays important role in aspects, for instance, evolutionary models. Moreover, it conveys information about structure of different layers that compose interior and its atmosphere. Despite efforts to obtain accurate measurements , subject still debated, are puzzling and/or lacking many frequency ranges. Aims. We...
ABSTRACT We present deep total intensity and polarization observations of the Coma cluster at 1.4 6.6 GHz performed with Sardinia Radio Telescope. By combining single-dish data archival Very Large Array observations, we obtain new images central radio halo peripheral relic where properly recover brightness from large-scale structures. At GHz, detect both part in polarization. These are highest frequency available to date for these sources this galaxy cluster. In halo, find a localized spot...
Observations of supernova remnants (SNRs) are a powerful tool for investigating the later stages stellar evolution, properties ambient interstellar medium, and physics particle acceleration shocks. For fraction SNRs, multi-wavelength coverage from radio to ultra high-energies has been provided, constraining their contributions production Galactic cosmic rays. Although emission is most common identifier SNRs prime probe refining models, high-resolution images at frequencies above 5 GHz...
A novel printed antenna is designed for wearable and RFID applications in the UHF band. The design performed following energy-based guidelines available recent literature. High robustness with respect to human body coupling achieved by confining electric energy density a region far from borders. proposed configuration also provides compact realization, high versatility, since it can be easily matched different commercial chips. prototype of this has been manufactured tested an anechoic...
We present new observations of the galaxy cluster 3C 129 obtained with Sardinia Radio Telescope in frequency range 6000-7200 MHz, aim to image large-angular-scale emission at high-frequency radio sources located this galaxies. The data were acquired using recently-commissioned ROACH2-based backend produce full-Stokes cubes an area 1 deg x centered on source 129. modeled and deconvolved telescope beam pattern from data. also measured instrumental polarization patterns correct images for...
We describe the design, construction, and performance of a compact orthomode transducer (OMT) for L-band receiver (1.3-1.8 GHz) Sardinia Radio Telescope (SRT). The complete OMT consists cylindrical junction (OMJ), which is presented in this paper, two identical 180 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">°</sup> hybrid power combiners double-ridged waveguide, have been proposed previous work. operates at cryogenic temperature 20 K to...
We observed the galaxy cluster CIZA J2242.8+5301 with Sardinia Radio Telescope to provide new constraints on its spectral properties at high frequency. conducted observations in three frequency bands centred 1.4 GHz, 6.6 GHz and 19 resulting beam resolutions of 14$^{\prime}$, 2.9$^{\prime}$ 1$^{\prime}$ respectively. These single-dish data were also combined archival interferometric 1.7 GHz. From images, we measured a flux density ${\rm S_{1.4GHz}=(158.3\pm9.6)\,mJy}$ for central radio halo...
We present the design of passive feed system dual-band receiver for prime focus Sardinia Radio Telescope (SRT), a new 64 m diameter radio telescope which is being built in Sardinia, Italy. The operates simultaneously P-band (305-410 MHz) and L-band (1300-1800 MHz). room temperature illuminators are arranged coaxial configuration with an inner circular waveguide (diameter 19 cm) outer 65 cm). Choke flanges used outside section to improve crosspolarization performance back scattering feed....
A microstrip directional coupler with high directivity is proposed for microwave applications requiring a weak coupling factor. This component has been used in the L‐band radio‐astronomical receiver of Sardinia radio telescope. To improve performance receiver, operating temperature lowered to 20 K. An in‐house cryostat manufactured perform measurements on coupler, and very good agreement design specification achieved.
A dual-band printed log-periodic dipole array (LPDA) antenna for wireless communications, designed on a low-cost PET substrate and implemented by inkjet-printing conductive ink, is presented. The proposed can be used communications both within the UHF (2.4–2.484 GHz) SHF (5.2-5.8 frequency bands, presents good out-of-band rejection, without need of stopband filters. has been using general-purpose 3-D computer-aided design software (CAD), CST Microwave Studio, then realized. Measured results...