首先，此論文的目的，是為了分析表面聲波元件(SAW)的整體串音干擾，其中包含了封裝與表面聲波元件上的佈線。我們提出了一種新的分析方法，使用時域有限差分法並結合等效電流源法，我們分別分析了兩種不同的佈線，在同樣的指狀電極(IDT)與封裝盒下的影響，從實驗的驗證結果中，可以發現我們的方法可以得到相當好的吻合度，所以此法可以有效地用來分析表面聲波元件上的電磁干擾問題。

其次，我們使用等效電流源法去模擬人體的靜電放電現象，並討論表面聲波元件上犧牲電極的效率，接著，我們提出使用碎形結構，所組成的新型犧牲電極，來防護靜電破壞，比較傳統的電極，碎形結構可以更有效地提升防護的效率。

最後，因為射頻辨識系統(RFID)是使用調整晶片上的輸入阻抗，來產生背向反射編碼，所以我們提出了一種在接收機上，維持一定的位元錯誤率，並使被動標籤晶片的接收能量最大化的新分析與最佳化方法，此方法是使用在接收機上反射波的訊號星座圖，映射到被動標籤晶片上所需的史密斯圖，藉由此法，可以由系統的規格與接收傳送的天線特性中，簡單的訂出最佳化二位元系統的晶片輸入阻抗。

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.

Chapter 1 INTRODUCTION 1
1.1 Background 1
1.1.1 Crosstalk Effects on the Packaged SAW Filter 1
1.1.2 Electrostatic Discharge Effects on the SAW Pattern 2
1.2 Literature Survey and Contribution 3
1.2.1 Analysis of Crosstalk Effects on the Packaged SAW Filter 3
1.2.2 Sacrificial Electrode with Fractal Concept for ESD Protection 5
1.3 Outline of the thesis 7

Chapter 2 SIMULATION METHOD 8
2.1 FDTD Formulation 8
2.2 Source Consideration 10
2.3 Modeling of One-Port SAW Resonator 12
2.4 Source Consideration of ESD 16

Chapter 3 SIMULATION RESULTS AND VERIFICATION OF PACKAGED SAW 17
3.1 Standard Pattern of the One-Port SAW Resonator 20
3.2 Complex Pattern of the One-Port SAW Resonator 23

Chapter 4 ANALYSIS AND DESIGN OF SACRIFICIAL ELECTRODES FOR ESD PROTECTION 27
4.1 Study of Sacrificial Electrodes on the SAW Pattern 27
4.2 Design of Sacrificial Electrodes with Fractal Structure 32

Chapter 5 CONCLUSION 34

Appendix A 36
Appendix B 39
Appendix C 40
Appendix D OPTIMUM DESIGN OF RFID PASSIVE TRANSPONDER USING SMITH CHART AND SIGNAL CONSTELLATION 42
D.1 Introduction 42
D.2 Analysis Method for Two-Way RFID Link 45
D.3 Optimum Design 49
D.4 Case Study 50
D.5 Conclusion 53

Bibliography 54
VITA 59

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