Slotted Circular Polarized Rectangular Microstrip Patch Antenna with Enhanced Bandwidth for Wireless Communication in 2.45GHz

Abstract

In this paper, a microstrip patch antenna with improved bandwidth and return loss is design. From the conventional circular polarized rectangular microstrip patch antenna (CP RMPA), two slots were introduced in the radiating patch, and its effect on antenna characteristics like return loss and bandwidth were observed. By introducing two slots, an enhancement in bandwidth and return loss has been achieved. From 5.8% to 6.26% bandwidth and return loss from -30.219dB to -52.54dB. Both conventional and slotted CP RMPA was designed and modeled in CST Studio software, using a FR-4 epoxy as substrate material with dielectric constant $\varepsilon$r of 4.3 and uses a coaxial probe as feed. The slot area were also varied and analyzed.