Essays about: "dipol"

Found 5 essays containing the word dipol.

  1. 1. Antenna Implants and Feasibility of Performance Limitations : AStudy of Radiation Efficiency on Electrically Small Antenna Implants with Finite Conductivity and Size

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Erik Algarp; [2022]
    Keywords : Antennaimplant; Medical Implant CommunicationSystem; Electrically small antenna; Electric dipole; Magnetic dipole; Fundamental bounds; Performance limits; Radiation efficiency; Conductor loss; Antennimplant; Medical Implant Communication System; Elektriskt små antenner; Elektrisk dipol; Magnetisk dipol; Fundamentala begränsningar; Prestandagränser; Strålningseffektivitet; Metallförlust;

    Abstract : Antenna implants are used to establish a telemetry link to enable wireless data transfer, suitable for telemedicine and other medical applications. Inbody environments with water-based tissues lead to severe power absorption, making signal strength and radiation efficiency challenging yet central performance aspects of antenna implants. READ MORE

  3. 2. Inverse source modeling of roll induced magnetic signature

    University essay from Uppsala universitet/Avdelningen för beräkningsvetenskap

    Author : Erik Thermaenius; [2022]
    Keywords : inverse modeling; inverse; modeling; magnetic; signature; source modeling; tikhonov; roll; magnetic silencing; regularization; regularisation; induction; dipole; dipoles; Helmholtz; inversmodellering; magnetisk; signatur; källmodellering; rullning; rullningsinducerad; regularisering; dipol; dipoler;

    Abstract : Vessels constructed in electrically conductive materials give rise to frequency-dependent, induced magnetic fields when waves of water cause them to roll in the Earth's magnetic field. These fields, typically referred to as roll-induced magnetic vortex fields, are a component of the ship's overall signature, where signature refers to measurable quantities which can reveal or identify objects. READ MORE

  4. 3. Investigation of Near-Field Contribution in SBR for Installed Antenna Performance

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Harald Hultin; [2019]
    Keywords : Shooting and Bouncing Rays; Geometrical Optics GO ; Physical Optics PO ; antenna modeling; computational electromagnetics CEM ; CST; dipole; ray tubes; Geometrisk Optik; Fysikalisk Optik; antennmodellering; elektromagnetism; CST; dipol;

    Abstract : To investigate near-eld contributions for installed antennas, an in-house code iswritten to incorporate near-eld terms in Shooting and Bouncing Rays (SBR). SBRis a method where rays are launched toward an object and scatter using GeometricalOptics (GO). These rays induce currents on the object, from which the totalscattered eld can be found. READ MORE

  5. 4. Determination and compensation of magnetic dipole moment inapplication for a scientific nanosatellite mission

    University essay from KTH/Rymd- och plasmafysik

    Author : Csaba Jéger; [2017]
    Keywords : cubesat; magnetic dipole estimation; attitude dynamics; cubesat; magnetisk dipol uppskattning; attityddynamik;

    Abstract : SEAM (Small Explorer for Advanced Missions) is a 3U CubeSat developedat KTH Royal Institute of Technology which will provide highqualityDC and AC magnetic field measurements of Earth’s magneticfield. The measurement system requires extended periods of timeup to 1000 seconds without active attitude control. READ MORE

  6. 5. Synoptic Variability of Extreme Snowfall in the St. Elias Mountains, Yukon, Canada

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Caroline Andin; [2015]
    Keywords : Snow; glaciers; Yukon; synoptic meteorology; Aleutian Low;

    Abstract : Glaciers of southwestern Yukon (Canada) and southeastern Alaska (USA) are presently experiencing high rates of annual mass loss. These high melt rates have mainly been investigated with respect to regional temperature trends, but comparatively little is known about how climate variations regulate snow accumulation on these glaciers. READ MORE