摘要
与IC标签相比,声表面波标签有其独特的优势。在仿真研究的基础上,对声表面波标签进行了设计、制作和测试。标签设计主要体现在压电基片材料选择、叉指换能器设计、反射栅设计3个方面;实际制作了6组结构各不相同的标签并进行了封装;通过网络分析仪对设计制作的标签进行了测试,包括特征频率测试、反射栅编码测试、叉指换能器激发效率测试3个部分。测试结果表明,标签特征频率与设计要求一致;通过对回波脉冲幅值的判别可实现对标签编码的识别;叉指换能器对数增多和孔径增大都会增加其激发效率。
Compared with IC tag,surface acoustic wave tag has its unique advantages. Based on the simulation research, the design,fabrication and testing of SAW tag are performed. The SAW tag design includes the piezoelectric substrate material selection, the inter-digital transducers design and the reflectors design. Six groups of SAW tags are fabricated and packaged. The characteristic frequency, reflector encoding and IDT excitation efficiency are experimentally tested through the network analyzer. The testing conclusions are as follows： The characteristic frequency is consistent with the design requirement; the code can be read out by analyzing the amplitude of the echo pulse; the excitation efficiency can be improved by increasing inter-digital transducers pairs and aperture.
出处
《压电与声光》
CSCD
北大核心
2013年第1期4-9,共6页
Piezoelectrics & Acoustooptics
基金
江苏省科技支撑计划工业基金资助项目(BE2011180)
国家自然科学基金资助项目(51005121)
航空科学基金资助项目(2010ZD52045)
南京航空航天大学研究生创新基金资助项目(KFJJ20110116)
江苏高校优势学科建设工程基金资助项目
关键词
声表面波标签
压电基片
叉指换能器
反射栅
网络分析仪
特征频率
surface acoustic wave tag
piezoelectric substrate
inter-digital transducer
reflector
network analy-zer
characteristic frequency
