Title :
A Ceramic Spiral Antenna used for Modern RFID System
Author :
Lin, Bin ; Zhou, Jianhua ; You, Baiqiang ; Xu, Weiming
Author_Institution :
Dept. of Electron. Eng., Xiamen Univ., Xiamen
Abstract :
For the requirements of wideband RFID antenna, we designed a ceramic spiral antenna working at 915 MHz. The simulated results show that when VSWR (vertical standing wave ratio) is less than 2, the antenna bandwidth is up to 1.22 GHz (0.57 ~1.79 GHz) absolutely and to 133.21% relatively at the central frequency of 0.9 GHz. Considering engineering processes, the influence of dielectric constant epsivr, and thickness of circuit board are particularly studied. On this basis, a dual- frequency ceramic spiral antenna is proposed, which can work with respect to all the main frequencies of RFID system, i.e. 915 MHz and 2.4 GHz.
Keywords :
broadband antennas; ceramics; radiofrequency identification; spiral antennas; ceramic spiral antenna; vertical standing wave ratio; wideband RFID antenna; Bandwidth; Broadband antennas; Ceramics; Costs; Dielectric constant; Dielectric substrates; Directive antennas; Frequency; Radiofrequency identification; Spirals;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2008. WiCOM '08. 4th International Conference on
Conference_Location :
Dalian
Print_ISBN :
978-1-4244-2107-7
Electronic_ISBN :
978-1-4244-2108-4
DOI :
10.1109/WiCom.2008.532
