Singularity Elimination in Current Distribution of a Dipole Antenna in Method of Moment (MOM)

Abstract

In this paper, the singularity subtraction technique for method of moments applying for a dipole antenna is explained. In the calculation of the current distribution waveform for the dipole antenna using method of moment from the Pocklingtons' Integral Equation has faced many logarithmic singularity terms. To avoid the singularities in this paper, we modify the Greens' function which is a major portion of the Pocklington's Integral Equation. The Pulse function is the most common and one of the simplest basis function in numerical computational technique Method of Moment (MOM). So, here we choose the basic function as the Pulse function and the further calculation is done. Mathematical integration by parts technique is employed for the calculation of the unknown current function. The singularity terms are due to mainly the Greens' function. So, the Greens' function is modified for the singularity elimination. The undesired or error output i.e. undesired current waveform of the dipole antenna and the desired one are also compared. The computation of unknown current function using Method of Moment is quite simple adopting Pulse function as the basis function rather than other basis functions.