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Investigation of Package Effects and ESD Protections on the SAW Devices and Optimum Design of RFID Passive Transponder

First, one of the purposes of this thesis is to estimate the complete crosstalk effects including the package and the pads on the surface acoustic wave (SAW) substrate. A new approach based on finite-difference time-domain (FDTD) with equivalent current source method is applied. Two kinds of patterns of one-port SAW resonators with the same package structure and inter-digital transducer (IDT) design are studied. Verification with the measurement results shows that our method is able to obtain good agreement and be used to observe the influence from the SAW pattern.
Second, the equivalent current source method is extended to model the excitation of human-body¡¦s electrostatic discharge (ESD) situations. The efficiencies of sacrificial electrodes are also discussed. Finally, a novel sacrificial electrode with fractal to protect SAW devices from ESD break is proposed. Comparing with traditional electrode, the simulation results show that fractal can improve the protective efficiency greatly.
Finally, a novel analysis model that can be used to analyze and optimize the impedance of an RFID transponder integrated circuit (IC) which uses backscatter encoding based on simultaneously maintaining the BER of the reader and maximizing the received power of the transponder IC is proposed. The analysis method utilizes mapping from signal constellation of the backscattered signal to the Smith chart to relate the two parameters. Given the system specification and characteristics of the reader and transponder antennas, the optimum impedances of transponder IC for binary communication system can be easily designed by using this model.

Identiferoai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0612106-181922
Date12 June 2006
CreatorsLin, Kuan-Yu
ContributorsHsueh-Yung Chao, Ken-Huang Lin, Chih-Wen Kuo, Kin-Lu Wong, Tzyy-Sheng Horng, Yu-De Lin, Tzong-Lin Wu, Ming-Cheng Liang
PublisherNSYSU
Source SetsNSYSU Electronic Thesis and Dissertation Archive
LanguageEnglish
Detected LanguageEnglish
Typetext
Formatapplication/pdf
Sourcehttp://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0612106-181922
Rightsunrestricted, Copyright information available at source archive

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