Design and Simulation of Circularly Polarized Pentagonal Shaped Micro-Strip Antenna

摘要

Pentagon circular polarization micro-strip antenna has good broadband performance and circular polarization characteristics but it is difficult to design. A new circular polarized micro-strip antenna with a pentagonal shape patch is designed for wide band operation at 5.6 GHz for WLAN. In this paper, the antenna is designed and simulated using HFSS9 analyzer. Feed point selection criteria for single ended side feeding method is presented, simulated and results for main parameters such as return loss, impedance bandwidth, radiation patterns and gains are measured and discussed here. The electric current distributions on the patch and the radiation patterns are also demonstrated in this paper. Based on the simulation of pentagon antenna unit, a four element antenna array is presented. The design method for feed net of the array is given. Simulation results show that proposed antenna array obtains a 4% 3dB bandwidth, and 12 dB gain.