《厦门大学学报（自然科学版）》

将低成本的标签用于射频识别(radio frequency identification,RFID)系统有利于促进物联网(the internet of things,IoT)的发展,为了降低标签成本,提出了L型微带谐振器加载的无芯片标签.标签采用收发正交的两面超宽带(ultra wideband,UWB)圆盘单极天线,通过长度不等的L型微带谐振器和50 Ω传输相耦合构成L型微带谐振器加载无芯片标签.在4.80～10.93 GHz频带上得到了20 bit的频率位置编码容量; 将幅度调制和频率位置调制进行混合编码后得到60 bit 的编码容量.通过制作4 bit编码容量的几种典型编码的标签进行测试,测试结果和仿真结果基本一致.

The use of low-cost tags for radio frequency identification(RFID)systems contributes to development of the internet of things(IoT). For reducing the cost of the tag, a chipless tag loaded by an L-shaped microstrip resonator is proposed in this paper. Two orthogonal ultra wideband(UWB)monopole discantennas are used on the tag.The L-shaped microstrip resonator loaded chipless tag is comprised by coupling the L-shaped microstrip resonator with a 50 Ω transmission line.There are 20 bits coding capacity on the 4.80 GHz to 10.93 GHz frequency band. The coding capacity is obtained 60 bits by hybrid coding with frequency position and amplitude modulation.Finally, several typical L-shaped microstrip coupling resonator chipless tags with 4 bits coding capacity are produced for measurement and the test results agree satisfactorily with the simulation results.

引言
1 工作原理
2 L型微带谐振器加载的无芯片标签设计
3 实验测试
4 讨论
5 结论

图1 L型微带谐振器加载的无芯片标签的工作原理<br/>Fig.1 Working principle of L-shaped microstrip resonator loaded chipless tag

图1 L型微带谐振器加载的无芯片标签的工作原理
Fig.1 Working principle of L-shaped microstrip resonator loaded chipless tag

图2 L型微带谐振器加载的无芯片标签结构(a)和等效电路(b)<br/>Fig.2 Structure(a)and equivalent circuit(b)of L-shaped microstrip resonator loaded chipless tag

图2 L型微带谐振器加载的无芯片标签结构(a)和等效电路(b)
Fig.2 Structure(a)and equivalent circuit(b)of L-shaped microstrip resonator loaded chipless tag

图3 单个L型微带谐振器加载的无芯片标签电场分布(a)和谐振曲线(b)<br/>Fig.3 Electric field distribution(a)and resonance curve(b)of single L-shaped microstrip resonator loaded chipless tag

图3 单个L型微带谐振器加载的无芯片标签电场分布(a)和谐振曲线(b)
Fig.3 Electric field distribution(a)and resonance curve(b)of single L-shaped microstrip resonator loaded chipless tag

图4 4 bit L型微带谐振器加载的无芯片标签的谐振曲线<br/>Fig.4 Resonance curve of the 4 bits L-shaped microstrip resonator loaded chipless tag.

图4 4 bit L型微带谐振器加载的无芯片标签的谐振曲线
Fig.4 Resonance curve of the 4 bits L-shaped microstrip resonator loaded chipless tag.

图5 当Wr改变时谐振凹陷的幅度变化<br/>Fig.5 Amplitude changes of the resonance ditch when Wr changes

图5 当Wr改变时谐振凹陷的幅度变化
Fig.5 Amplitude changes of the resonance ditch when Wr changes

图6 几种典型编码的无芯片标签照片<br/>Fig.6 Photographs of four typical coding chipless tags

图6 几种典型编码的无芯片标签照片
Fig.6 Photographs of four typical coding chipless tags

图7 谐振曲线测试结果<br/>Fig.7 Measuring results of the resonance curve

图7 谐振曲线测试结果
Fig.7 Measuring results of the resonance curve

图8 16 bit L型微带谐振器加载的无芯片标签结构和电场分布<br/>Fig.8 Structure and electric field distribution of 16 bits L-shaped microstrip resonator loaded chipless tag

图8 16 bit L型微带谐振器加载的无芯片标签结构和电场分布
Fig.8 Structure and electric field distribution of 16 bits L-shaped microstrip resonator loaded chipless tag

图9 16 bit无芯片标签频谱仿真结果<br/>Fig.9 Spectrum simulated result of 16 bits chipless tag

图9 16 bit无芯片标签频谱仿真结果
Fig.9 Spectrum simulated result of 16 bits chipless tag

图10 开路枝节微带谐振器无芯片标签的照片<br/>Fig.10 Photograph of opening stub microstrip chipless tag

图10 开路枝节微带谐振器无芯片标签的照片
Fig.10 Photograph of opening stub microstrip chipless tag

图11 开路枝节微带无芯片标签的频谱仿真和测试结果<br/>Fig.11 Spectrum simulation and test results of the opening stub microstrip chipless tag

图11 开路枝节微带无芯片标签的频谱仿真和测试结果
Fig.11 Spectrum simulation and test results of the opening stub microstrip chipless tag

表1 不同类型无芯片标签比较<br/>Tab.1 Comparison of different types of chipless tags

表1 不同类型无芯片标签比较
Tab.1 Comparison of different types of chipless tags

[1] AONO K,LAJNEF N,FARIDAZAR F,et al.Infrastructural health monitoring using self-powered internet-of-things [C]∥2016 IEEE International Symposium on Circuits and Systems(ISCAS).Montreal:IEEE,2016:2058-2061.
[2] KARMAKAR N C.Tag,you're it radar cross section of chipless RFID tags [J].IEEE Microwave Magazine,2016,17(7):64-74.
[3] VENA A,PERRET E,TEDJINI S.A compact chipless RFID tag using polarization diversity for encoding and sensing [C]∥2012 IEEE International Conference on RFID(RFID).Orlando:IEEE,2012:191-197.
[4] PLESSKY V,REINDL L.Review on SAW RFID tags [J].IEEE Transactions on Ultrasonics,Ferroelectrics,and Frequency Control,2010,57(3):654-668.
[5] CHAMARTI A,VARAHRAMAYAN K.Transmission delay line based ID generation circuit for RFID applications [J].IEEE Microwave and Wireless Components Letters,2006,16(11):588-590.
[6] FENG C,ZHANG W,LI L,et al.Angle-based chipless RFID tag with high capacity and insensitivity to polarization[J].IEEE Transactions on Antennas and Propagation,2015,63(4):1789-1797.
[7] PRERADOVIC S,KARMAKAR N C.Design of fully printable planar chipless RFID transponder with 35-bit data capacity [C]∥2009 European Microwave Conference(EuMC).Rome:IEEE,2009:13-16.
[8] ISLAM M A,YAP Y,KARMAKAR N,et al.Orientation independent compact chipless RFID tag [C]∥2012 IEEE International Conference on RFID-Technologies and Applications(RFID-TA).Nice:IEEE,2012:137-141.
[9] VENA A,PERRET E,TEDJINI S.A fully printable chipless RFID tag with detuning correction technique [J].IEEE Microwave and Wireless Components Letters,2012,22(4):209-211.
[10] HARTMANN C S.A global SAW ID tag with large data capacity [C]∥Reprint form Proceedings of 2002 IEEE Ultrasonics Symposium.Munich:IEEE,2002:65-69.
[11] ISLAM M A,KARMAKAR N C.A novel compact printable dual-polarized chipless RFID system [J].IEEE Transactions on Microwave Theory and Techniques,2012,60:2142-2151.
[12] NI Y,HUANG X D,LV Y P,et al.Hybrid coding chipless tag based on impedance loading [J].IET Microwaves,Antennas & Propagation,2017,17(10):1325-1331.
[13] KHAN M M,TAHIR F A,CHEEMA H M.High capacity polarization sensitive chipless RFID tag [C]∥2015 IEEE Internatonal Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting.Vancouver:IEEE,2015:1770-1771.
[14] 雷振亚,明正峰,李磊,等.微波工程导论[M].北京:科学出版社,2010:140-142.
[15] LIANG J,CHIAU C C,CHEN X,et al.Study of a printed circular disc monopole antenna for UWB systems [J].IEEE Transactions on Antennas and Pro-pagation,2005,53(11):3500-3504.

备注

引言

1 工作原理

2 L型微带谐振器加载的无芯片标签设计

3 实验测试

4 讨论

5 结论

学报简介

备注

引言