ANTI-COLLISION SAW TAGS BASED ON CIDT

被引:0
作者
Zhong, Yue-yun [1 ]
Chen, Zhi-jun [1 ]
Wang, Xin-chen [1 ]
Han, Chao [1 ]
Fu, Jun [1 ]
机构
[1] Nanjing Univ Aeronaut & Astronaut, Coll Automat Engn, Nanjing 211106, Jiangsu, Peoples R China
来源
PROCEEDINGS OF THE 2015 SYMPOSIUM ON PIEZOELECTRICITY, ACOUSTIC WAVES AND DEVICE APPLICATIONS | 2015年
关键词
Surface acoustic wave tag; Correlation inter-digital transducer; Anti-collision; COMSOL Multiphysics;
D O I
暂无
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Many SAW RFID applications require the ability to read multiple tags located in close proximity, thus a structure of SAW tags based on CIDT is proposed to solve the "anti-collision" problem. Based on finite element analysis, the research of the CIDT-based anti-collision SAW tags is carried out by utilizing software COMSOL multiphysics. Primarily, the anti-collision unit of the SAW tags is studied from three aspects: the encoding method, the symmetry problem and the compatible code group of the CIDT. Then, the responses of the transducer-based SAW tags which consist of one input 7-bit Barker coded CIDT and four output IDTs in different correlation cases are studied. Furthermore, some improvement designs and extended applications of the CIDT-based anti-collision SAW tags are discussed. The simulation results show that the structure of the CIDT-based SAW tag makes it possible to solve the "anti-collision" problem for some RFID applications and can be easily combined with SAW sensors.
引用
收藏
页码:137 / 142
页数:6
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