0000000000014218

AUTHOR

Antonino Mistretta

showing 3 related works from this author

Design of a 1 kW output power Folded Waveguide TWT operating in ka-band

2019

A Ka-band Serpentine Folded Waveguide Travelling Wave Tube (TWT) has been designed. The imposed design parameters values in terms of high power, high load, wide bandwidth, low weight, along with a structure manufactured with planar technique or by means of a micro milling process, have been obtained. Small signal simulations have been carried out with an in-house software for interaction impedance evaluation. The commercial electromagnetic simulation code CST Suite has been used for dispersion diagram prediction. An optimization of the one-dimensional software, normally used for large-signal simulation in coupled cavity TWTs (“Computer Program for Analysis of Coupled-cavity Travelling-wave-…

Materials scienceComputer programbusiness.industryAcoustics020208 electrical & electronic engineeringBandwidth (signal processing)020206 networking & telecommunicationstravelling wave tubes (TWTs)02 engineering and technologySlow wave structure (SWS)Traveling-wave tubehigh powerlaw.inventionKa-bandFolded waveguide (FWG)SoftwarePlanarlaw0202 electrical engineering electronic engineering information engineeringKa bandParticle-in-cellbusinessElectrical impedance2019 International Vacuum Electronics Conference (IVEC)
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Increased prevalence of cardiac arrhythmias and transient episodes of myocardial ischemia in hypertensives with left ventricular hypertrophy but with…

1997

To evaluate the behavior of cardiac arrhythmias (CA) and transient episodes of myocardial ischemia (TEMI), in relation to the circadian pattern of blood pressure in patients suffering from arterial hypertension, with or without echocardiographically ascertained left ventricular hypertrophy (LVH), we studied 128 patients, 87 men (M) and 41 women (F), aging from 21 to 76 years, subdivided into two groups: Group I, including 66 patients with LVH (45 M and 21 F; mean age of 53.7 ± 9.1 years; Group II, including 62 patients without LVH ( 42 M and 20 F; mean age of 49.7 ± 9.5 years). Office blood pressure (OBP) as well as nighttime ambulatory blood pressure (ABP) were higher in patients with LVH …

AdultMalemedicine.medical_specialtyAmbulatory blood pressureHeart diseasePremature atrial contractionMyocardial IschemiaBlood PressureCoronary DiseaseVentricular tachycardiaLeft ventricular hypertrophyElectrocardiographyHeart RateInternal medicineHeart rateInternal MedicinemedicineHumanscardiovascular diseasesAgedbusiness.industryArrhythmias CardiacBlood Pressure Monitoring AmbulatoryMiddle Agedmedicine.diseaseEchocardiography DopplerCircadian RhythmBlood pressureHypertensioncardiovascular systemCardiologyFemaleHypertrophy Left VentricularSupraventricular tachycardiabusinessAmerican journal of hypertension
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Novel GaN Based Solid State Power Amplifiers, Results, Advances and Comparison with Vacuum Tubes Based Microwave Power Modules

2018

Power amplifiers based on vacuum tubes or solid state are key items in a number of systems. Solid state technology is growing up for some applications and it may be complementary to the vacuum technology. This paperwork presents SSPA operational principles and performance. The GaN technology available in the market, the technology roadmap, a comparison with the vacuum tubes are introduced

Microwave Power modulesMaterials scienceComputingMilieux_THECOMPUTINGPROFESSIONAmplifierVacuum tubeGallium nitrideSettore ING-INF/01 - ElettronicaEngineering physicsGeneralLiterature_MISCELLANEOUSlaw.inventionPower (physics)chemistry.chemical_compoundElectricity generationchemistrylawInsertion lossPower Amplifier: Solid state circuitTechnology roadmapRadio frequencyMicrowave TubeComputingMethodologies_COMPUTERGRAPHICS2018 IEEE 4th International Forum on Research and Technology for Society and Industry (RTSI)
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