Design of Miniaturized Antenna for RFID Applications

Abstract

This chapter presents the design of some miniature antenna for RFID application, in the ISM (industrial, scientific, and medical) band at 915 MHz and 2.45 GHz, by using two techniques. The first technique is the use of slots inserted into the microstrip antenna, and the second technique is the use of the fractal structure. In the end, both techniques are used together in one structure to get the benefit of each technique at the same time. These antennas are designed for RFID system. They can be used in a variety of fields such as access control, transport, banks, health, and logistics. One major consideration for handheld and portable RFID system applications is the compact size. Therefore, the design of miniature RFID antennas is important, and the microstrip antenna is a good choice because they are known to be low-profile, low weight, easy to make, and mechanically robust.