Performance Comparison of Probe-fed Polygonal Patch Antennas for L-Band Applications

An analysis to investigate the performance of various polygonal shaped patch antennas is presented here in this paper. The comparative analysis is based on the simulation results generated by full wave simulation software CST MWS (R). Basic polygonal patch antennas with patch geometries such as triangle, rectangle, pentagon and hexagon are simulated and compared with the circular radiator as well to understand the behavior and performance of low profile antennas fed with a probe. The coordinates of feed point lie at the midpoint of the circumradius in all patch geometries and arc varied angularly for half a sector of each polygon to optimize performance within L-band. Simulated analysis and comparison of the polygonal patch antennas demonstrate that decreasing the number of edges spreads the operating band. The triangular and hexagonal patch antenna yields impedance bandwidth of 0.79% and 2.8% centered at 1.5 GHz respectively. The polygonal shaped patch antennas are designed fur requirements for L-band applications.