Research on Fractal Tree RFID Tag Antenna on Papery Substrate

Based on the research of the fractal tree monopole antenna, fractal tree structure of dipole RFID tag antenna was proposed. Resonant frequencies, reflection coefficient and radiation patterns of fractal tag antennas were simulated with MoM, and a papery substrate tag antenna of the third iterated fractal tree is manufactured. The results of simulation and test showed that the space-filling feature of fractal antenna structure has been transformed to the size-reducing feature of RFID tag antenna effectively.