Title :
2.4GHz Yagi-Uda RFID tag antenna design with low back-lobe using genetic algorithm
Author :
Chung, You Chung ; Lee, Kyounghwan
Author_Institution :
Daegu Univ., Daegu
Abstract :
A long reading range 2.4 HGz Yagi-Uda RFID tag antenna with low back-lobe is designed. Since the EIRP (effective isotropic radiation power) of the reader is limited, to extend a reading range of the tag, the gain and front-back- ratio of the tag should be high as Yagi-Uda antenna. According to ISO 18000-4, the EIRP of the reader and reader antennas is about 30 mW. It is lower than EIRP of UHF RFID band. The optimized 5 elements Yagi-Uda tag antenna with a genetic algorithm (GA) has low back-lobe. The 5 elements sizes and spacing of Yagi-Uda antenna are optimized with a GA. The gain of main-lobe is 8.2 dB and back lobe is reduced to 0 dB. The performance of the 2.4 GHz Yagi-Uda type tag antenna is better than that of general type tag and conventional Yagi-Uda tag antennas.
Keywords :
UHF antennas; genetic algorithms; radiofrequency identification; UHF band; Yagi-Uda RFID tag antenna design; effective isotropic radiation power; frequency 2.4 GHz; genetic algorithm; low back-lobe; power 30 mW; Algorithm design and analysis; Antenna feeds; Bandwidth; Design optimization; Frequency; Genetic algorithms; Impedance; RFID tags; Radiofrequency identification; Transmitting antennas; 2.45GHz RFID Tag; Genetic Algorithm; RFID Tag; Yagi-Uda RFID Tag;
Conference_Titel :
Radio and Wireless Symposium, 2008 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4244-1462-8
Electronic_ISBN :
978-1-4244-1463-5
DOI :
10.1109/RWS.2008.4463532
