MFIE-based propagation prediction

Propagation Prediction Based on Time Domain Electric Field Integral Equation for Smoothly Irregular Terrains

“…1. Dividing the terrain profile in the incidence plane into N segments, the MoM can be used to calculate the magnetic currents in (4). By neglecting backscattering, the currents can be recursively calculated following the approach in [3], using:…”

“…The propagation prediction in the frequency domain using integral equations has been developed in several works. Here, particularly important are references [3] and [4]. In [3], equations based on the Electric Field Integral Equation (EFIE) were proposed to predict signals over a smoothly irregular terrain.…”

“…The method was also applied to a terrain profile in Denmark and compared with measured data, showing good agreement. Following a similar procedure, in [4] a prediction method was developed using the Magnetic Field Integral Equation (MFIE). The MFIE was found to have a better numerical convergence than the EFIE for the scenario investigated in [3].…”

“…By applying the Inverse Fourier Transform (IFT) to the frequency domain MFIE formulation developed in [4], a time domain MFIE (TD-MFIE) was proposed in [5]. With the backscattering neglected, a march-on-in-time scheme was used to evaluate the time-domain integral and, consequently, obtain the time-domain equivalent magnetic currents.…”

Predição de cobertura em terrenos mistos de baixa rugosidade: uma abordagem via equações integrais

“…Aproximac ¸ões foram estabelecidas desde o trabalho de Hufford [1], dada a complexidade inerente das formulac ¸ões propostas. Modelos baseados em equac ¸ões integrais do campo elétrico (EFIE) e do campo magnético (MFIE) foram propostos por Hviid [2] e Moreira [3] para polarizac ¸ão vertical em terrenos suavemente irregulares. O retro-espalhamento da energia foi desprezado, permitindo o cálculo recursivo das correntes equivalentes através do Método dos Momentos Cláudio Garcia Batista e Cássio Gonc ¸alves do Rego¸Programa de Pós-Graduac ¸ão em Engenharia Elétrica, Escola de Engenharia, Universidade Federal de Minas Gerais, Belo Horizonte, e-mails: claudio@cpdee.ufmg.br,cassio@cpdee.ufmg.br.…”