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Transmission Lines in Digital and Analog Electronic Systems. Signal Integrity and Crosstalk. Edition No. 1

  • ID: 2182353
  • Book
  • October 2010
  • 312 Pages
  • John Wiley and Sons Ltd
In the last 30 years there have been dramatic changes in electrical technology--yet the length of the undergraduate curriculum has remained four years.  Until some ten years ago, the analysis of transmission lines was a standard topic in the EE and CpE undergraduate curricula.  Today most of the undergraduate curricula contain a rather brief study of the analysis of transmission lines in a one-semester junior-level course on electromagnetics. In some schools, this study of transmission lines is relegated to a senior technical elective or has disappeared from the curriculum altogether.  This raises a serious problem in the preparation of EE and CpE undergraduates to be competent in the modern industrial world.  For the reasons mentioned above, today's undergraduates lack the basic skills to design high-speed digital and high-frequency analog systems.  It does little good to write sophisticated software if the hardware is unable to process the instructions.  This problem will increase as the speeds and frequencies of these systems continue to increase seemingly without bound.  This book is meant to repair that basic deficiency.
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Preface xi

1 Basic Skills and Concepts Having Application to Transmission Lines 1

1.1 Units and Unit Conversion 3

1.2 Waves, Time Delay, Phase Shift, Wavelength, and Electrical Dimensions 6

1.3 The Time Domain vs. the Frequency Domain 11

1.3.1 Spectra of Digital Signals 12

1.3.2 Bandwidth of Digital Signals 17

1.3.3 Computing the Time-Domain Response of Transmission Lines Having Linear Terminations Using Fourier Methods and Superposition 27

1.4 The Basic Transmission-Line Problem 31

1.4.1 Two-Conductor Transmission Lines and Signal Integrity 32

1.4.2 Multiconductor Transmission Lines and Crosstalk 41

Problems 46

Part I Two-Conductor Lines and Signal Integrity 49

2 Time-Domain Analysis of Two-Conductor Lines 51

2.1 The Transverse Electromagnetic (TEM) Mode of Propagation and the Transmission-Line Equations 52

2.2 The Per-Unit-Length Parameters 56

2.2.1 Wire-Type Lines 57

2.2.2 Lines of Rectangular Cross Section 68

2.3 The General Solutions for the Line Voltage and Current 71

2.4 Wave Tracing and Reflection Coefficients 74

2.5 The SPICE (PSPICE) Exact Transmission-Line Model 84

2.6 Lumped-Circuit Approximate Models of the Line 91

2.7 Effects of Reactive Terminations on Terminal Waveforms 92

2.7.1 Effect of Capacitive Terminations 92

2.7.2 Effect of Inductive Terminations 94

2.8 Matching Schemes for Signal Integrity 96

2.9 Bandwidth and Signal Integrity: When Does the Line Not Matter? 104

2.10 Effect of Line Discontinuities 105

2.11 Driving Multiple Lines 111

Problems 113

3 Frequency-Domain Analysis of Two-Conductor Lines 121

3.1 The Transmission-Line Equations for Sinusoidal Steady-State Excitation of the Line 122

3.2 The General Solution for the Terminal Voltages and Currents 123

3.3 The Voltage Reflection Coefficient and Input Impedance to the Line 123

3.4 The Solution for the Terminal Voltages and Currents 125

3.5 The SPICE Solution 128

3.6 Voltage and Current as a Function of Position on the Line 130

3.7 Matching and VSWR 133

3.8 Power Flow on the Line 134

3.9 Alternative Forms of the Results 137

3.10 The Smith Chart 138

3.11 Effects of Line Losses 147

3.12 Lumped-Circuit Approximations for Electrically Short Lines 161

3.13 Construction of Microwave Circuit Components Using Transmission Lines 167

Problems 170

Part II Three-Conductor Lines and Crosstalk 175

4 The Transmission-Line Equations for Three-Conductor Lines 177

4.1 The Transmission-Line Equations for Three-Conductor Lines 177

4.2 The Per-Unit-Length Parameters 184

4.2.1 Wide-Separation Approximations for Wires 185

4.2.2 Numerical Methods 196

Problems 205

5 Solution of the Transmission-Line Equations for Three-Conductor Lossless Lines 207

5.1 Decoupling the Transmission-Line Equations with Mode Transformations 208

5.2 The SPICE Subcircuit Model 210

5.3 Lumped-Circuit Approximate Models of the Line 227

5.4 The Inductive-Capacitive Coupling Approximate Model 232

Problems 236

6 Solution of the Transmission-Line Equations for Three-Conductor Lossy Lines 239

6.1 The Transmission-Line Equations for Three-Conductor Lossy Lines 240

6.2 Characterization of Conductor and Dielectric Losses 244

6.2.1 Conductor Losses and Skin Effect 244

6.2.2 Dielectric Losses 248

6.3 Solution of the Phasor (Frequency-Domain) Transmission-Line Equations for a Three-Conductor Lossy Line 251

6.4 Common-Impedance Coupling 260

6.5 The Time-Domain to Frequency-Domain Method 261

Problems 270

Appendix A Brief Tutorial on Using PSPICE 273

Index 295

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Clayton R. Paul University of Kentucky, Lexington.
Note: Product cover images may vary from those shown
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