Search results for " Antennas"

showing 6 items of 16 documents

A discussion of potential exposure metrics for use in epidemiological studies on human exposure to radiowaves from mobile phone base stations

2000

There is currently a high level of concern in many countries that exposure to radiowaves from mobile phone base stations may be hazardous to health. When investigating such suggested risks, epidemiologists need to define an exposure metric that can reliably discriminate between exposed and unexposed groups of people. We conducted a feasibility study to investigate if either short-term measurements of electric field strength, calculations of electric field strength, or distance from nearby mobile phone base stations could be used to develop a metric reflecting an individual's exposure to radiowaves. With electric field strengths in the range of 0.012-0.343 V/m, radiowaves from mobile phone b…

Population levelRadio WavesEpidemiologybusiness.industryPublic Health Environmental and Occupational HealthEnvironmental ExposureModels TheoreticalToxicologyPollutionTelephoneEpidemiologic StudiesBase stationElectromagnetic FieldsMobile phoneHuman exposureBase station antennasHumansEnvironmental sciencePublic HealthNetwork providersTelecommunicationsbusinessRadio broadcastingJournal of Exposure Science & Environmental Epidemiology
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Optimization of multichip RFID tag antenna with genetic algorithm and method of moments

2013

A specific procedure is implemented for the optimization of passive part of multichip RFID tag antenna, based on the performance parameter in terms of newly developed concepts. Examples are given and significant improvements have been observed comparing with previous results, which verifies the approach.

RFID antenna optimizationEngineeringbusiness.industryTag antennaGenetic algorithmElectronic engineeringMethod of moments (statistics)Internet of ThingsbusinessUhf antennas2013 IEEE Antennas and Propagation Society International Symposium (APSURSI)
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Dependence of Terahertz Emission and Detection in Photoconductive Antennas on Laser Parameters

In this study, we employ a standard Terahertz time-domain spectroscopy (THz-TDS) setup based on two photoconductive antennas (PCAs) for THz radiation generation and detection. The characterization of the emission and detection performance as a function of the input pulse wavelength and bandwidth is performed.

THz time-domain spectroscopyphotoconductive antennasSettore ING-INF/02 - Campi ElettromagneticiSettore ING-INF/01 - Elettronica
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Terahertz Time-Domain Spectroscopy setup based on photoconductive antennas

2016

Despite the technical difficulties in developing efficient and compact sources and detectors for Terahertz (THz) radiation, this region of the electromagnetic spectrum is attracting an ever-increasing interest, due to its peculiar and high-potential applications in several fields, such as wideband communications, medicine, biology, non-destructive testing, security and defense. Within such contexts, the most widespread approach aiming to deal with THz pulses is based on the THz Time-Domain Spectroscopy (THz-TDS) system. In this work, we present our experimental results obtained by means of a THz-TDS set-up based on photoconductive antennas for both the generation and detection stage. It is …

Terahertz SpectroscopySettore ING-INF/02 - Campi ElettromagneticiSettore ING-INF/01 - ElettronicaPhotoconductive Antennas.
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Terahertz time-domain spectroscopy based on photoconductive antennas

2016

In this work, we present our first experimental results obtained by means of a THz-TDS setup based on photoconductive antennas (PCAs). The main elements of the setup are: i) a mode-locked Ti:Sapphire femtosecond laser (Mai-Tai SP - Spectra Physics), providing optical pulses at 800±20 nm with a duration < 50 fs and repetition rate of 84 MHz; ii) two photoconductive antennas, made in LT-GaAs (Low-Grown Temperature Gallium Arsenide), operating as THz emitter and detector; iii) an optical delay line.

Terahertz time-domain spectroscopySettore ING-INF/02 - Campi ElettromagneticiPhotoconductive antennasSettore ING-INF/01 - Elettronica
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Radiometric Partial Discharge Detection: A Review

2023

One of the most common failures or breakdowns that can occur in high-voltage (HV) equipment is due to partial discharges (PDs). This occurs as a result of inadequate insulation, aging, harsh environmental effects, or manufacturing flaws. PD detection and recognition methods have gained growing attention and have seen great progress in the past decades. Radiometric methods are one of the most investigated detection approaches due to their immunity to electromagnetic interference (EMI) and their capabilities to detect and locate PD activities in different applications such as transformers, cables, etc. Several review articles have been published to classify and categorize these works. Nonethe…

UHF antennaprinted antennasinductive sensorControl and OptimizationRenewable Energy Sustainability and the EnvironmentEnergy Engineering and Power TechnologyPartial discharge detectionBuilding and Constructionradiometric detectionHV equipment diagnosiloop antennaSettore ING-IND/31 - ElettrotecnicaElectrical and Electronic EngineeringEngineering (miscellaneous)Energy (miscellaneous)
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