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Designing BT Antenna for RFID Systems

By Ahmad Bayat

Abstract

Abstract: This paper is about designing and optimizing a new antenna employed for RFID applications at microwave frequencies. The structure is designed in a way that it resonates at 2.45GHz, which is one of the RFID frequencies. The new patch is derived from BT(Bow-Tie) antenna. It results in a reduction of the size by more than 70%, as compared to monopole patch, alongside with having an acceptable gain and directivity. Based on a model of triangular antenna, a correspondent resonant model is presented. Simulation results achieved using our method show that the antenna and its model have the same resonant frequency at 2.45GHz. However, there was a little difference in Bandwidth. It should be noted that the lines usually are used at high frequencies because its length gets long in the low frequency and making circuit will be impractical [13]. Microstrip line is a line that has a conductive strip of land and a home which are separated by a dielectric medium. Figure (1) shows the structure of a Microstrip. Dielectric material acts as a medium between the conductors and the earth. The typical dielectric substrate, including two contact points with alumina and silicon, makes the dielectric wavelength higher and thereby, the whole circuit will be smaller

Topics: Key Terms, Radio Frequency Identification RFID, Tag, Readable Range R, BT Antenna
Year: 2014
OAI identifier: oai:CiteSeerX.psu:10.1.1.416.8653
Provided by: CiteSeerX
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