Surface Acoustic Wave Devices in Telecommunications

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1 Surface Acoustic Wave Devices in Telecommunications Modelling and Simulation Bearbeitet von Ken-Ya Hashimoto 1. Auflage Buch. xiii, 330 S. Hardcover ISBN Format (B x L): 15,6 x 23,4 cm Gewicht: 1480 g Weitere Fachgebiete > Technik > Elektronik > Bauelemente, Schaltkreise schnell und portofrei erhältlich bei Die Online-Fachbuchhandlung beck-shop.de ist spezialisiert auf Fachbücher, insbesondere Recht, Steuern und Wirtschaft. Im Sortiment finden Sie alle Medien (Bücher, Zeitschriften, CDs, ebooks, etc.) aller Verlage. Ergänzt wird das Programm durch Services wie Neuerscheinungsdienst oder Zusammenstellungen von Büchern zu Sonderpreisen. Der Shop führt mehr als 8 Millionen Produkte.

2 Contents 1. Bulk Acoustic and Surface Acoustic Waves Bulk Acoustic Waves Elastic Waves in Solids Wavevector and Group Velocity Behavior of BAWs at a Boundary Diffraction Piezoelectricity Evanescent Fields Waveguides Behavior at the Boundary Between Waveguides Open Waveguides Waves in a Semi-infinite Substrate Excitation of L- and SV-type Waves Excitation of SH-type Waves Leaky SAWs Leaky and Nonleaky SAWs SSBW References Grating Basic Structure Fundamentals Reflection Center Behavior in Periodic Structures Bragg Reflection Energy Storing Effect Fabry Perot Resonator Equivalent Circuit Analysis Analysis Dependence of Reflection Characteristics on Parameters Metallic Grating Fundamental Characteristics SAW Dispersion Characteristics Approximated Dispersion Characteristics References... 46

3 X Contents 3. Interdigital Transducers Fundamentals Bidirectional IDTs Unidirectional IDTs Static Characteristics Charge Distribution Electromechanical Coupling Factor Element Factor Complex Electrode Geometries Effect of IDT Ends IDT Modeling Delta-Function Model Equivalent Circuit Model Other Models Influence of Peripheral Circuit Summary Smith Chart and Impedance Matching Achievable Bandwidth p Matrix Summary IDT Characterization by Using p Matrix Discussion on Unidirectional IDTs BAW Radiation Phase Matching Condition Radiation Characteristics References Transversal Filters Basics Weighting Basic Properties of Weighted IDTs Effects of Peripheral Circuits Design of Transversal Filters Fourier Transforms Remez Exchange Method Linear Programming Spurious Responses Diffraction Bulk Waves Other Parasitic Effects Low-Loss Transversal Filters Multi-IDT Structures Transversal Filters Employing SPUDTs Combination of SPUDTs and Reflectors References

4 Contents XI 5. Resonators One-Port SAW Resonators Introduction Fabry Perot Model Spurious Responses Beam Diffraction and Transverse Modes Transverse-Mode Analysis Effect of BAW Radiation Two-Port SAW Resonators Summary Fabry Perot model Multi-Mode Resonator Filter Cascade Connection of Resonators Impedance Element Filters π-type Filters Lattice-Type Filters Ladder-Type Filters References Selection of Substrate Material Substrate Material and Device Characteristics Orientation Influence of Substrate and Electrode Materials Evaluation of Acoustic Properties by Effective Permittivity Effective Permittivity Approximate Expressions Single Crystals Quartz LiNbO LiTaO Li 2 B 4 O Langasite Thin Films References Coupling-of-Modes Theory Fundamentals Collinear Coupling Periodic Structures Excitation COM Theory for SAW Devices Derivation COM Equations in Other Forms Inclusion of Electrode Resistivity Examples

5 XII Contents 7.3 Determination of COM Parameters Perturbation Theory Wave Theory Based Analysis Analysis for Multi-Electrode IDTs COM-Based Simulators SAW Device Simulation Inclusion of Peripheral Circuit Results of Simulation References Simulation of SH-type SAW Devices Physics of SH-Type SAWs Summary Propagation and Excitation on a Uniform Surface Behavior on a Grating Electrical Characteristics of IDTs Effects of Back-Scattered BAWs Influence of Grating Edge COM Theory for SH-Type SAWs COM Parameter Derivation Simulation COM Parameters for Rayleigh-Type SAWs Derivation of Approximate Dispersion Relations Derivation of Plessky s Dispersion Relation Derivation of Abbott s Dispersion Relation References A. Physics of Acoustic Waves A.1 Elasticity of Solids A.2 Piezoelectricity A.3 Surface Acoustic Waves A.4 Effective Acoustic Admittance Matrix and Permittivity A.5 Acoustic Wave Properties in 6mm Materials A.5.1 Rayleigh-Type SAWs A.5.2 Effective Permittivity for BGS Waves A.5.3 Effective Acoustic Admittance Matrix A.6 Wave Excitation A.6.1 Integration Path A.6.2 Electrostatic Coupling A.6.3 BGS Wave Excitation A.6.4 SSBW Excitation References

6 Contents XIII B. Analysis of Wave Propagation on Grating Structures B.1 Summary B.2 Metallic Gratings B.2.1 Blφtekjær s Theory for Single-Electrode Gratings B.2.2 Wagner s Theory for Oblique Propagation B.2.3 Aoki s Theory for Double-Electrode Gratings B.2.4 Extension to Triple-Electrode Gratings B.3 Analysis of Metallic Gratings with Finite Thickness B.3.1 Combination with Finite Element Method B.3.2 Application to Extended Blφtekjær Theories B.4 Wave Excitation and Propagation in Grating Structures B.4.1 Effective Permittivity for Grating Structures B.4.2 Evaluation of Discrete Green Function B.4.3 Delta-Function Model B.4.4 Infinite IDTs References Index

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