Simulation of a microstrip antenna using custom non-uniform triangular-rectangular meshes

A microstrip trapezoidal monopole UWB antenna, described in the literature, is simulated in this paper. The antenna is analyzed in frequency range 1-14 GHz. The simulations are carried out using four different meshes: two generated by commercial application (Ansoft Desinger®), and two by a custom mesher (CGSM). For each mesh generator, 10 or 15 cells per wavelength are used. The following parameters are compared: input impedance, return loss, and peak accepted gain. Moreover, co- and cross-polarization radiation patterns at two different frequencies are presented. The results obtained using different meshes are found to be very similar. Yet, when custom-generated meshes are used, significant reduction in the number of unknowns (up to 67%) and in the simulation time (up to 71%) is observed. The conclusion is that the proposed mesher is more efficient than the mesh generator of Desinger® when used for the analysis of such an antenna and, most likely, similar circuits.