Oğuz, U.Gürel, Levent2016-02-082016-02-0820020920-5071http://hdl.handle.net/11693/24670The applications of discrete-time signal-processing techniques, such as windowing and filtering for the purpose of implementing accurate excitation schemes in the finite-difference time-domain (FDTD) method are demonstrated. The effects of smoothing windows of various lengths and digital lowpass filters of various bandwidths and characteristics are investigated on finite-source excitations of the FDTD computational domain. Both single-frequency sinusoidal signals and multifrequency arbitrary signals are considered.EnglishComputer simulationDifference equationsElectromagnetic wave scatteringFinite difference methodLow pass filtersSignal processingTable lookupTime domain analysisDipole excitationsFinite-difference time-domain methodMultifrequency arbitrary signalsSingle-frequency sinusoidal signalsAntenna radiationArticle