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Simple Excitation Model for Coaxial Driven Monopole Antennas
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2010)
A new excitation model for the numerical solution of field integral equation (EFIE) applied to arbitrarily shaped monopole antennas fed by coaxial lines is presented. This model yields a stable solution for the input ...
Planewave Density Interpolation Methods for the EFIE on Simple and Composite Surfaces
(2021)
This article presents an extension of the recently introduced planewave density interpolation method to the electric-field integral equation (EFIE) for problems of scattering and radiation by perfect electric conducting ...
Caracterização da propagação radioelétrica sobre terrenos irregulares utilizando equações integrais no domínio do tempo
(Universidade Federal de Minas GeraisUFMG, 2018-02-27)
In this work it is proposed a formulation to predict the propagation of an electromagnetic wave over a smoothly irregular terrain using the Electric Field Integral Equation in the time domain (TD-EFIE). It is proposed a ...
Predição de cobertura em enlaces radioelétricos sobre terrenos irregulares através de equações integrais
(Universidade Federal de Minas GeraisUFMG, 2001-08-29)
In the present work two deterministic techniques, based on the electric- and magnetic- field integral equations (EFIE and MFIE, respectively) are applied in the propagation prediction of VHF and UHF vertically-polarized ...
Predição de cobertura radioelétrica em terrenos irregulares usando método de funções de base características
(Universidade Federal de Minas GeraisUFMG, 2011-11-16)
This work deals with the propagation of electromagnetic waves in the VHF (Very High Frequencies) and UHF (Ultra High Frequencies) bands over irregular terrain. This study is concerned in development an computationally ...
Aplicação da transformada rápida de Fourier em equações integrais no domínio do tempo para a caracterização de propagação radioelétrica
(Universidade Federal de Minas GeraisBrasilENG - DEPARTAMENTO DE ENGENHARIA ELÉTRICAPrograma de Pós-Graduação em Engenharia ElétricaUFMG, 2021-02-24)
This work proposes accelerating prediction of propagation of an electromagnetic wave
based on time-domain integral equations by using Fast Fourier Transform (FFT). In this
problem, a vertically - or parallel - polarized ...
Método da equação parabólica no domínio do tempo (TDPE) aplicado a predição e análise da propagação em terrenos irregulares
(Universidade Federal de Minas GeraisBrasilENG - DEPARTAMENTO DE ENGENHARIA ELÉTRICAPrograma de Pós-Graduação em Engenharia ElétricaUFMG, 2019-02-27)
In this work the Time Domain Parabolic Equation (TDPE) method is applied to analyze the propagation in two dimensions, in the paraxial direction x and height z, of the electromagnetic field with grazing incidence and vertical ...
Projeto e otimização de antenas helicoidais não uniformes
(Universidade Federal de Minas GeraisUFMG, 2013-12-18)
In this dissertation, uniform helical antennas are used as a starting point to generate nonuniform optimized antennas . Improvements in the gain and input impedance are obtained by varying the helix shape using a second ...
Caracterização UWB de antenas filamentares no domínio espaço-temporal: uma abordagem via equações integrais e extração de ressonâncias naturais
(Universidade Federal de Minas GeraisUFMG, 2012-06-29)
In this work, an approach based on the Singularities Expansion Method (SEM) is employed for the characterization Ultra-Wide Band (UWB) of filamentary antennas through a semi-analytical representation of an effective height ...