Wunderlich curve fractal dipole antenna for dual-band wearable RFID applications

Abstract

In this study, a wearable textile tag dipole antenna is introduced as a candidate for use in RFID applications. The antenna structure had been designed based on a modified version of the Wunderlich fractal geometry of the second iteration. The proposed antenna is simulated with two form of substrate conventional and textile for traditional substrate it offered a dual band at 0.952 and 2.5 GHz and when it modeled on a textile substrate it offers a dual-band response resonating at 0.952 and 2.7 GHz. Results show that the textile antenna presents acceptable radiation characteristics with peak gains of about 1.214 dBi and read range 12.76 m for lower band and 2.704 dBi with 4.9 m read range for upper band. The effect of the thread radius, the characterization of different textile material used as the substrate when nine textile materials are chosen for the compression and also the various layer of textile has been studied in this research. Modeling and performance characteristics are evaluated by using the commercially available EM simulator, the CST Microwave Studio.