Surface Acoustic Wave Devices and Their Signal Processing Applications
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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
13.6 Second-Order Effects in SAW Tapped Delay Lines
13.7 SAW Transducers for Quadraphase Code Generation
13.8 SAW Filters for Continuous Phase Shift Modulation (CPSM)
13.9 Programmable SAW Transversal Filters
13.10 Summary
13.11 References
14 Real-Time SAW Convolvers
14.1 Introduction
14.2 Nonlinear Piezoelectric Behavior of SAW Devices
14.3 Convolution Relations for the Elastic SAW Convolver
14.4 Using the Elastic SAW Convolver as a Correlator
14.5 The Monolithic Waveguide Type of SAW Convolver
14.6 The Three-Port Acoustoelectric SAW Convolver
14.7 The Four-Port Acoustoelectric SAW Convolver
14.8 Synchronous and Asynchronous Operation of SAW Convolvers
14.9 Summary
14.10 References
15 SAW Oscillators and Frequency Synthesizers
15.1 Introduction
15.2 Phase Noise Spectrum of an Oscillator
15.3 SAW Oscillator Performance Expectations
15.4 Time-Domain Oscillator Stability Measurements
15.5 Single-Mode Fixed-Frequency SAW Oscillators
15.6 Single-Mode Tunable SAW Oscillators
15.7 Multimode SAW Oscillator
15.8 A SAW-Based Frequency Synthesizer
15.9 Summary
15.10 References
16 Real-Time SAW Fourier-Transform Processors
16.1 Introduction
16.2 Single-Stage SAW Fourier-Transform Processors
16.3 Two-Stage Fourier-Transform Processors for Cepstrum Analysis
16.4 Two-Stage SAW Transform Processor for Real-Time On-Line Filtering
16.5 Use of SAW Bilinear Mixers
16.6 Summary
16.7 References
17 SAW Filters in Digital Communications
17.1 Introduction
17.2 Review of Pertinent Codes and Power Spectra
17.3 Nyquist Theorems and Filters
17.4 Illustrative SAW Nyquist Filter Applications
17.5 SAW Filters for Clock Recovery in Optical Fiber Data Systems
17.6 Summary
17.7 References
18 Other Techniques and Developments
18.1 Scope of This Chapter
18.2 Withdrawal-Weighting Design of Interdigital Transducers
18.3 Interdigital Transducers with Slanted- or Curved-Finger Geometries
18.4 Reflective Dot Array (RDA) Compressor
18.5 Techniques Using Half-Length Multistrip Coupler (MSC) Geometries
18.6 Highlights of SAW-Based Acousto-Optic Techniques
18.7 Further Developments in SAW-Based Devices on Gallium Arsenide
18.8 Shallow Bulk Acoustic Wave (SBAW) Devices
18.9 Summary
18.10 References
Index
Product details
- No. of pages: 484
- Language: English
- Copyright: © Academic Press 1989
- Published: May 28, 1989
- Imprint: Academic Press
- eBook ISBN: 9780323148665
About the Author
Colin Campbell
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