The numerical simulation results of several broadband microstrip antenna designs, which are not described in the literature, are presented. Frequency band expansion according to the criteria of a matching is achieved by applying a three-layered dielectric, resonator with a translucent wall and additional extra scatterers. 41% bandwidth is provided for the matching level VSWR < 2. Numerically obtained results of an input impedance and radiation patterns (RP) are given.