Microstrip patch antenna design and performance analysis for RFID applications at ISM band (2.45 GHz)

This paper presents the design and analysis of an wideband microstrip patch antenna performance for Industrial, Scientific and Medical (ISM) band (2.45 GHz) applications e.g., Radio Frequency Identification Application (RFID) applications. A Flame Retardant-4 (FR-4) material is used as substrate and the size is 29 × 46 mm². This antenna has a gain of 3.019 dB with VSWR of almost 1.3 and HPBW of about 111.3 deg. This antenna has an ultra-wide bandwidth of about 21.67% with resonant frequency at 2.4 GHz. The performance of the proposed antenna is analyzed as well as compared with various RFID reader antennas at ISM band. It is designed and simulated in CST Microwave Studio software.