Description
Surface Acoustic Wave Devices and Their Signal Processing Applications is a textbook that combines experiment and theory in assessing the signal processing applications of surface acoustic wave (SAW) devices. The operating principles of SAW devices are described from a circuit design viewpoint. This book is comprised of 18 chapters and begins with a historical background on surface acoustic waves and a discussion on the merits of SAW devices as well as their applications. The next chapter introduces the reader to the basics of acoustic waves and piezoelectricity, together with the effect of acoustic bulk waves on the performance of SAW filters. The principles of linear phase SAW filter design and equivalent circuit models for a SAW filter are then described. The remaining chapters focus on trade-offs in linear phase SAW filter design; compensation for second-order effects; harmonic SAW delay lines for gigahertz frequencies; and coding techniques using linear SAW transducers. The final chapter highlights Some other significant alternative design techniques and applications for SAW devices. This monograph will be suitable for engineering or physics students as well as engineers, scientists, and technical staff in industry who seek further information on SAW-based circuits, systems, and applications.
Table of Contents
Preface 1 Introduction 1.1 Historical Background 1.2 Merits of SAW Devices 1.3 Outline of SAW Device Applications 1.4 Aims of This Text 1.5 References 2 Basics of Acoustic Waves and Piezoelectricity 2.1 Introduction 2.2 Surface Acoustic Waves 2.3 Effect of Acoustic Bulk Waves on SAW Filter Performance 2.4 Summary 2.5 References 3 Principles of Linear Phase SAW Filter Design 3.1 Linear Phase Filters 3.2 Deviations from Ideal Phase Response in SAW Filters 3.3 Simple Modeling of an Ideal Linear Phase SAW Filter 3.4 Fourier Transforms and IDT Finger Apodization 3.5 Use of Window Functions for Improved Bandpass Response 3.6 Overall SAW Filter Response 3.7 Summary 3.8 References 4 Equivalent Circuit Models for a SAW Filter 4.1 Introduction 4.2 The Delta Function Model 4.3 SAW Power Flow in Bidirectional IDTs 4.4 The Crossed-Field Model 4.5 Application to Overall SAW Filter Response 4.6 Impulse Response Model 4.7 Summary 4.8 References 5 Trade-Offs in Linear Phase SAW Filter Design 5.1 Introduction 5.2 Bandwidth Limitations in Linear Phase SAW Filter Design 5.3 Design Trade-Offs 5.4 Summary 5.5 References 6 Compensation for Second-Order Effects 6.1 Introduction 6.2 Finger Reflections 6.3 Use of a Multistrip Coupler in Linear Phase SAW Filters 6.4 Diffraction and Diffraction Compensation 6.5 Acoustic Attenuation 6.6 More on Triple-Transit Effects—Unidirectional IDTs 6.7 Electromagnetic Feedthrough 6.8 Summary 6.9 References 7 Designing SAW Filters for Arbitrary Amplitude/Phase Response 7.1 Introduction 7.2 Negative and Positive Frequency Concepts in IDT Design 7.3 The IDT as a Sampled-Data Structure 7.4 Sampling the IDT Fingers at Other Rates 7.5 Summary 7.6 References 8 Finite Impulse Response Design Techniques for Linear Phase SAW Filters 8.1 Introduction 8.2 Some Digital Filter Concepts 8.3 Using the Remez Algorithm for SAW Filter Design 8.4 Baseband Designs and the Effect of Sampling 8.5 Illustrative Remez Computations and SAW Filter Designs 8.6 Summary 8.7 References 8A A Computer Program for SAW FIR Filter Design 9 The SAW Linear FM Chirp Filter 9.1 Introduction 9.2 The IDT for a SAW Linear FM Chirp Filter 9.3 The Slanted Array Compressor (SAC) 9.4 The Reflective Array Compressor (RAC) 9.5 SAW Chirp Filters in Pulse Compression Radar 9.6 Variable Delay Lines Using SAW Chirp Filter 9.7 Summary 9.8 References 10 The Two-Port SAW Resonator 10.1 Introduction 10.2 SAW Reflections and Reflection Gratings 10.3 Design Parameters and Constraints 10.4 Matrix Building Blocks for the SAW Resonator 10.5 Summary 10.6 References 11 Harmonic SAW Delay Lines for Gigahertz Frequencies 11.1 Introduction 11.2 Harmonic Operation of Linear Phase SAW Filters 11.3 Impulse Response Measurements as a Diagnostic Tool 11.4 Summary 11.5 References 12 Comb and Single-Phase Unidirectional Transducers 12.1 Introduction 12.2 Basic SAW Comb Filters Using a Tapped IDT Delay Line 12.3 SAW Comb Filters with More Complex IDT Structures 12.4 SAW Filters with Single-Phase Unidirectional Transducers (SPUDTs) 12.5 Illustrative Coupling-of-Modes Design of SPUDTBased SAW Filter 12.6 Experimental Performance of SPUDT-Based SAW Filter 12.7 Low-Loss SAW Comb Filters Using Unidirectional Transducers 12.8 A Postscript on the Double-Metalization SPUDT 12.9 Summary 12.10 References 13 Coding Techniques Using Linear SAW Transducers 13.1 Introduction 13.2 Matched Filter Concepts 13.3 Rationale for Using Spread Spectrum 13.4 Processing Gain with Binary Phase-Coded SAW IDTs 13.5 Fixed-Code SAW Transducers for Binary Phase Shift Keying 13.
