Investigate the Performance of Various Shapes of Planar Monopole Antenna on Modified Ground Plane Structures for L frequency Band Applications

In this paper, various shapes of planar monopole antenna on different ground plane structures are presented. It is designed for the 1-2 GHz frequency band for L-band application. A monopole of square, circular, triangular and hexagon shape is mounted vertically on the dielectric of glass epoxy (FR4 lossy substrate) with relative permittivity of 4.3, thickness of 1.6 mm above the ground plane through a single feeding strip. Simulation results such as impedance bandwidth, directivity, gain and radiation pattern are also analyzed and compared. The effect of feeding strip is a critical parameter for the performance of antenna, is studied for various shapes of monopole antenna are investigated. The radiation performance is also shown to be acceptable over a wide range of frequency.