A Dual-frequency Ceramic Spiral Antenna with Rectangle PBG Structure Array used for Modern RFID System
For wideband RFID systems, we designed a dualfrequency ceramic spiral antenna with rectangle PBG structure array, working well with respect to the main frequencies of 915 MHz and 2.4 GHz. The size of the antenna is minimized obviously, only 30 mm × 30 mm × 1 mm. The simulated results show that the working center frequency in lower and higher frequency sections are 0.95 GHz and 2.55 GHz separately, at which the return loss values S11 are -23.22 dB and -15.98 dB respectively. And for VSWR less than 2, the absolute antenna bandwidths apartly are up to 0.254 GHz (0.837 ～ 1.091 GHz) and 1.02 GHz (2.157 ～ 3.177GHz). Considering engineering processes, the influences of dielectric constant εr and thickness of circuit board on the performance of antenna are particularly studied. We also discussed the rectangle PBG structure array in detail, including its length, width and arrangement regulation. At last, the contrast analysis on different radiation characteristics of the antenna while being sticked on various materials has been done to validate the function stability.
wideband RFID ceramic spiral antenna PBG structure array
Bin Lin Jianhua Zhou Baiqiang You Weiming Xu
Department of Electronic Engineering Xiamen University Xiamen,Fujian,PR of China
国际会议
The IET 2nd International Conference on Wireless,Mobile & Multimedia Networks(第二届IET国际无线移动多媒体网络会议)
北京
英文
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）