Design and simulation of an optimized slotted patch antenna for RFID reader applications

In this work, new form of patch antenna for RFID reader applications in the microwave band has been proposed. The patch is a perfect electrical conductor, excited by a 50 ohms microstrip line, set on an Epoxy FR-4 substrate. The first results were obtained on a basic structure of a rectangular patch antenna adapted with notches. These results have been improved by introducing slots in the basic structure. The structure design, optimization and simulation results analysis were performed under electromagnetic simulators HFSS and CST, and focused on the return loss, bandwidth, gain and directivity.