Unnamed aerial vehicles (UAVs) or drones have attracted growing interest in the last few years for multiple applications; thanks to their advantages terms of mobility, easy movement, and flexible positioning. In UAV-based communications, mobility higher line-of-sight probability represent opportunities flying UAVs while limited battery capacity remains its major challenge. Thus, they can be employed specific applications where permanent presence is not mandatory. Data gathering from wireless...

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...

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...

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 describes the realization of a versatile anthropomorphic multi-tissue head phantom for testing microwave imaging devices, employing mixtures featuring readily available, not harmful, and stable components. Considering that evaluation such as medical ones, might require variation characteristics tissues their assessment, manufacturing approaches issue using both unalterable adjustable For former, we reproduce skin, fat, bone, grey matter, white cerebellum, ventricles flexible solid...

The early diagnosis of Alzheimer’s disease remains an unmet medical need due to the cost and invasiveness current methods. Early detection would ensure a higher quality life for patients, enabling timely suitable treatment. We investigate microwave sensing low-cost, non-intrusive assessment disease. This study is based on emerging evidence that electromagnetic properties cerebrospinal fluid are affected by abnormal concentrations proteins recognized as early-stage biomarkers. design...

This paper proposes an energy-efficient solution to employ a drone gather data from spatially distributed wireless sensors. Specifically, we minimize the energy consumption of while accomplishing tour collect needed data. accounts for both energies due transfer and motion drone. The objective is determine positions where stops each cluster sensors as well path that needs follow complete its gathering tour. problem decomposed into two sub-problems. first sub-problem targets sub-groups stop...

CubeSat is a nanosatellite platform that provides access to space for small payloads. It an attractive solution exploration missions as it reduces cost and development time. However, size constraints restrict the surface area solar panels thus generated power. The efficiency of power condition modules electrical system (EPS) relevant feature in design CubeSat. One parameters defines converters their operating input output voltages; these voltages are given by array configurations cells...

We assess the application of microwave tomography (MWT) for detection axillary lymph nodes (ALNs) in breast cancer patients. numerically study effects limiting angular view MWT, as probes can only be placed on a limited arc around region. also possibility increasing amount retrievable information by acquiring data two consecutive steps, with single antenna set different positions. finally experimentally test MWT anthropomorphic phantoms levels anatomical fidelity, and ALN Our system (0.8–2.5...

This paper proposes an innovative technique to calibrate microwave imaging (MWI) systems combining available measured data with simulated synthetic ones. The introduced aims compensate the variations of antenna array due unavoidable manufacturing tolerances and placement, in comparison nominal electromagnetic (EM) scenario. scheme is tested virtually experimentally for MWI adult human head tissues. virtual EM analysis uses a realistic 3-D CAD model working together full-wave software, based...

This paper presents the design, realization, and experimental assessment of a novel portable microwave scanner prototype for brain stroke monitoring. The device employs 22-antenna-array, placed conformal to upper head part, composed compact, flexible, custom-made antennas working at around 1 GHz. validation includes monitoring an experimentally emulated evolving hemorrhagic stroke. progression medical condition is via non-static phantom (custom-shape balloon), derived from images,...

Diagnostic techniques able to detect Alzheimer's disease in its early stage are costly, invasive, and lack portability. Early detection is fundamental give patients the best treatment possibility plan their future life accordingly, benefits caregivers medical professionals. To address drawbacks of current technologies, microwave imaging sensing emerging as a non-intrusive, relatively low-cost alternative methods differentiate between normal pathological states. The physiological basis behind...

The growing figures of brain stroke impact on the global population, especially in low-to-middle-income countries, and its severe short long-term medical repercussions have raised demand for additional technological solutions that support specific needs efforts against those. This work presents a tailored low-complexity microwave-based scanner designed monitoring after-onset stroke, experimental validation anthropomorphic multi-tissue head phantoms, mimicking realistic clinical conditions....