Abstract
This paper presents a new application of dielectric resonator antenna in radio frequency identification system. A curved dual-band dielectric resonator antenna for RFID applications is proposed. The tag antenna is designed to operate at 2.45 GHz (2.25– 2.55 GHz) and 5.8 GHz (5.65– 5.95 GHz) bands. The radiation characteristics of the tag antenna in free space are investigated. The radar cross sections under different loads are obtained. The effect of curvature on the tag antenna performance is explained. Two examples are considered. In the first example, the tag antenna is mounted on cylindrical bottle filled with the Polyethylene material. The effect of the object properties on the radiation characteristics and the radar cross section is investigated. In the second example, the tag antenna is mounted on spherical bottle filled with the Polyethylene material. The radiation and backscattering characteristics are calculated. The Finite Element Method (FEM) is used for simulation and the Finite Integration Technique (FIT) is used to verify the simulated results.
Highlights
RFID systems were introduced as a solution for identification of large volume of objects in a shorter period of time
The L‐shape monopole is responsible for the presence of the first resonance frequency at 2.45 GHz
While in the upper frequency band there is a small shift in the resonance frequency to about 70 MHz at RC =20 mm, Φ =74.5o and 40 MHz at RC =50 mm, Φ =29.8o compared with the similar results in the planar case
Summary
RFID systems were introduced as a solution for identification of large volume of objects in a shorter period of time. RFID systems provide an automatic means to identify physical objects without the need for line‐of‐sight communication [1,2,3]. The main components of a RFID system are tags, readers, and host computer. RFID tags are attached to physical objects as a means to identify them. RFID readers convert the radio waves sent from the tags to get the digital data and send the collected data to the host computer. The use of RFID systems depends on the frequency bands licensed by governments. They include 135 kHz, 13.56 MHz, 868 MHz (Europe), 915 MHz (U.S.), 2.45 GHz, and 5.8 GHz among others [4]. Most of tag antennas are a design compromise between conflicting requirements. There is no one right transponder for all applications and this field of RF design is open for innovative ideas
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