Rectangular Patch Antenna for Dual-Band RFID and WLAN Applications

In this paper, a simple microstrip antenna for the radio frequency identification (RFID) applications and wireless local area network (WLAN) is presented. The antenna has two operating bands at 2.45 and 5.8 GHz, which are reserved for RFID applications and WLAN applications. The studied antenna design, analysis and characterization have been performed using CST electromagnetic simulation software. The antenna was analyzed with FR4 substrate. Reflection coefficient, VSWR and directivity results were simulated, presented and discussed. The designed antenna was fabricated on ArlonAD320 dielectric with relative permittivity of 3.2. SMA female connector is used for feeding with characteristic impedance of 50 Ω. The measured reflection coefficient of the proposed antenna is compared with the simulated one, good agreement is observed. The proposed antenna is simple in design and compact in size, providing broadband impedance matching, consistent omnidirectional radiation patterns and appropriate gain characteristics (>1.5 dBi) in the RFID frequencies regions.