Yagi-Like Printed Antennas for Wireless Sensor Networks

In this work, two alternative printed antennas for wireless sensor networks applications in the ISM band are presented. The antennas are based on the well- known Yagi-Uda antenna and the principal difference between them is on the printed dipole design; in only one face of the substrate or in both faces. The design has been performed by using an in house developed code based on FDTD algorithm. In the design process, we have focused on the optimization of the bandwidth and the directivity. Finally, some prototypes with different number of dipoles have been fabricated and measured. The good agreement between simulated and experimental results demonstrates the validity of the simulations. The radiation parameters show the potentiality of these antennas for increasing the distance of communication in wireless networks.