High gain Sierpinski Gasket fractal shape antenna designed for RFID

In this paper a high gain Sierpinski fractal shape antenna (reader) for RFID applications is proposed. With the increasing needs of multiband, high gain, very directive antennas and good capability of integration of various wireless technologies, the antenna´s research can be oriented following different ways. One of them is use fractals elements. Traditionally, an antenna works at a single frequency or at two frequencies, whereas with a fractal antenna, it can be performed to have multiple resonance frequencies. The antenna had been simulated using CST Microwave Studio software. The antenna was fabricated on FR4 substrate and measured using the Vectorial Network Analyser VNA8510. The proposed different antenna profile provides at 868 MHz: a return-loss measured of -16 dB, a high simulated gain of 16.4 dB and radiation efficiency greater than 92%.