Essays about: "waveguide model"

Showing result 1 - 5 of 7 essays containing the words waveguide model.

  1. 1. Particle Simulation and Optimization of a Relativistic Magnetron for HPM Applications

    University essay from Uppsala universitet/Fasta tillståndets elektronik

    Author : Wilhelm Thunberg; [2022]
    Keywords : Relativistic Magnetron; FOI Magnetron; TE11; HPM; High Power Microwaves; Particle in cell; MAgic3d;

    Abstract : A relativistic magnetron (RM) is a high-power microwave (HPM) source. The main objective of the RM is to generate directed electromagnetic pulses with high power, which can be used in e.g. HPM weapons and for electromagnetic compatibility testing. READ MORE

  3. 2. Scanning range extension by combining arrays with lenses

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

    Author : Hairu Wang; [2022]
    Keywords : Dome Antenna; Dielectric Lens; Array Antenna; Kupolantenn; Dielektrisk lins; Array antenn;

    Abstract : Array antennas, and more specifically phased array antennas, are widely used in radar detection and communication systems because of their excellent beam scanning ability and simple control. Generally speaking, the scanning function can be realized in two ways: mechanically or electronically. READ MORE

  4. 3. Evaporation Duct Modelling for a Wave-Propagation Simulator

    University essay from Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

    Author : Oscar Eklund; [2022]
    Keywords : evaporation; duct; height; monin; obukhov; mos; surface; layer; ssft; byc; pj; businger; dyer; beljaars; holtslag; cheng; brutsaert; sheba;

    Abstract : Long-range communication proves to be a challenge due to the Earth’s curvature, since electromagnetic waves propagate away from the Earth’s surface in a free atmosphere. A possible solution to beyond line-of-sight communication is the atmospheric phenomenon known as the evaporation duct. READ MORE

  5. 4. Circuit analysis of a parallel plate waveguide

    University essay from KTH/Elektroteknisk teori och konstruktion

    Author : Noj Kazemi; [2017]
    Keywords : Waveguide; Discontinuities; Dispersion; ABCD matrix; Circuit model; E-mode functions; Variational Method; Integral Equation Method; Static Method; two-port; three-port; four-port; V°agledare; diskontinuiteter; Dispersion; ABCD Matris; Kretsmodell; E-mods funktioner; Variationsmetoden; Integralekvations metoden; Statiska metoden; Tv°a-portar; Tre-portar; Fyr-portar;

    Abstract : The aim of this work was to model a four-port waveguide as a simple circuit,by first starting with a two-port then a three-port waveguide. Duethat the work was based on Nathan Marcuvitz book Waveguide handbook,an analytical solution for the circuit parameters was desired. READ MORE

  6. 5. Characterization of attractors in a model for boundary-driven nonlinear optical waveguide arrays with disorder, gain and damping

    University essay from Teoretisk Fysik; Tekniska högskolan

    Author : Felix Faber; [2013]
    Keywords : waveguide arrays; nonlinear; disorder; gain; damping; randomly distributed potentials; DNLS; Discrete nonlinear Schrödinger equation;

    Abstract : The purpose of this thesis is to study the effects of gain and damping on a nonlinear waveguide array with a strong disorder that is driven in the first site, and try to find regimes which have stable stationary solutions. This has been done with a modified DNLS (Discrete nonlinear Schrödinger equation). READ MORE