Front-to-Back Ratio Improvement of a Microstrip Patch Antenna by Partial Removal of Ground Plane

摘要

This paper presents a simple technique to improve the Front-To-Back Ratio (FTBR) of a microstrip patch antenna by etching slots in the groundplane. The radiation in the backward direction of the microstrip patch antenna is reduced by introducing two slots in the ground plane designed for 2.45 GHz. The simulation was carried out by using CST Microwave Studio 2016. Simulation results show that the back lobe level can be reduced considerably by more than 15 dB, over and above the side lobe level of plain microstrip antenna. Half Power Beamwidth (HPBW), Return loss and Voltage Standing Wave Ratio (VSWR) are also improved.