基于CIDT的SAW防碰撞标签

2015 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA) Pub Date : 2015-12-28 DOI:10.1109/SPAWDA.2015.7364458

Yue-yun Zhong, Zhi-jun Chen, Xin-chen Wang, Chao Han, Jun Fu

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引用次数: 3

摘要

许多SAW RFID应用要求能够读取近距离的多个标签，因此提出了一种基于CIDT的SAW标签结构来解决“防碰撞”问题。在有限元分析的基础上，利用COMSOL multiphysics软件对基于cidd的SAW防撞标签进行了研究。首先，从编码方法、对称问题和CIDT兼容码组三个方面对SAW标签的防碰撞单元进行了研究。然后，研究了由1个输入7位Barker编码的CIDT和4个输出idt组成的基于传感器的SAW标签在不同相关情况下的响应。此外，还讨论了基于cidd的SAW标签的改进设计和扩展应用。仿真结果表明，基于cidd的SAW标签结构可以解决一些RFID应用中的“防碰撞”问题，并且可以很容易地与SAW传感器结合。

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Anti-collision SAW tags based on CIDT

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.

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2015 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)

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