Summary
International Symposium on Antennas and Propagation
2008
Session Number:4D10
Session:
Number:4D10-4
Design of a dipole tag antenna with a double loop for UHF RFID application
Gyubong Jung, Youngbaek Choi, Uisheon Kim, Jaehoon Choi,
pp.-
Publication Date:2008/10/27
Online ISSN:2188-5079
Summary:
Recently, UHF Radio Frequency Identification (RFID) systems have gained great attention due to the advantage of long reading distance. A tag consists of an antenna and an Application Specific Integrated Circuit (ASIC) chip. Designing of an antenna for RFID tag is difficult in matching the antenna impedance with that of a tag chip. Unlike the impedance matching for traditional antennas, the conjugate matching method is used to design RFID antennas to get high power transmission between an antenna and a chip[1]. Since the energy transmission between the chip and the antenna is most important factor to determine the reading distance, a successful antenna design is estimated by the degree of conjugate impedance matching between antenna element and chip[2]. In this paper, a dipole antenna with a double loop is proposed as a tag. The required input resistance and reactance can be easily achieved by adjusting appropriate geometry parameters. The proposed antenna has a great advantage of controlling the antenna impedance under various conditions.