1. Auflage - Juni 2010
87,90 Euro
2010. 302 Seiten, Hardcover
ISBN-10: 0-470-54295-0
ISBN-13: 978-0-470-54295-8 - John Wiley & Sons

Preis inkl. Mehrwertsteuer zzgl. Versandkosten.





Probekapitel

Kurzbeschreibung
Radiowave Propagation provides an overview of the physical mechanisms governing electromagnetic wave propagation in the Earth's troposphere and ionosphere. With an accessible and student-oriented approach, this textbook explores a wide range of topics in a combination of physical and empirical descriptions. Student-approved by Ohio State University, this source presents current empirical information, helping students to strengthen their electromagnetic physics skills. Both engineers and students will find the balance of physical and empirical models provides the basic physical insight as well as practical means for the computations needed in system design.

Aus dem Inhalt
Preface.

1 Introduction.

1.1 Definition of Propagation.

1.2 Propagation and Systems Design.

1.3 Historical Perspective.

1.4 The Influence of Signal Frequency and Environment.

1.5 Propagation Mechanisms.

1.6 Summary.

1.7 Sources of Further Information.

1.8 Overview of Text.

2 Characterization of Propagation Media.

2.1 Introduction.

2.2 Maxwell's Equations, Boundary Conditions, and Continuity.

2.3 Constitutive Relations.

2.4 Dielectric Behavior of Materials: Material Polarization.

2.5 Material Properties.

2.5.1 Simple Media.

2.6 Magnetic and Conductive Behavior of Materials.

References.

3 Plane Waves.

3.1 Introduction.

3.2 D'Alembert's Solution.

3.3 Pure Traveling Waves.

3.4 Information Transmission.

3.5 Sinusoidal Time Dependence in an Ideal Medium.

3.6 Plane Waves in Lossy and Dispersive Media.

3.7 Phase and Group Velocity.

3.8 Wave Polarization.

References.

4 Antenna and Noise Concepts.

4.1 Introduction.

4.2 Antenna Concepts.

4.3 Basic Parameters of Antennas.

4.3.1 Receiving Antennas.

4.4 Noise Considerations.

References.

5 Direct Transmission.

5.1 Introduction.

5.2 Friis Transmission Formula.

5.3 Atmospheric Gas Attenuation Effects.

5.4 Rain Attenuation.

5.5 Scintillations.

Appendix 5.A Look Angles to Geostationary Satellites.

References.

6 Reflection and Refraction.

6.1 Introduction.

6.2 Reflection from a Planar Interface: Normal Incidence.

6.3 Reflection from a Planar Interface: Oblique Incidence.

6.4 Total Reflection and Critical Angle.

6.5 Refraction in a Stratified Medium.

6.6 Refraction Over a Spherical Earth.

6.7 Refraction in the Earth's Atmosphere.

6.8 Ducting.

6.9 Ray-Tracing Methods.

References.

7 Terrain Reflection and Diffraction.

7.1 Introduction.

7.2 Propagation Over a Plane Earth.

7.3 Fresnel Zones.

7.4 Earth Curvature and Path Profile Construction.

7.5 Microwave Link Design.

7.6 Path Loss Analysis Examples.

7.7 Numerical Methods for Path Loss Analysis.

7.8 Conclusion.

References.

8 Empirical Path Loss and Fading Models.

8.1 Introduction.

8.2 Empirical Path Loss Models.

8.3 Signal Fading.

8.4 Narrowband Fading Mitigation Using Diversity Schemes.

8.5 Wideband Channels.

8.6 Conclusion.

References.

9 Groundwave Propagation.

9.1 Introduction.

9.2 Planar Earth Groundwave Prediction.

9.3 Spherical Earth Groundwave Prediction.

9.4 Methods for Approximate Calculations.

9.5 A 1 MHz Sample Calculation.

9.6 A 10 MHz Sample Calculation.

9.7 ITU Information and Other Resources.

9.8 Summary.

Appendix 9.A Spherical Earth Groundwave Computations.

References.

10 Characteristics of the Ionosphere.

10.1 Introduction.

10.2 The Barometric Law.

10.3 Chapman's Theory.

10.4 Structure of the Ionosphere.

10.5 Variability of the Ionosphere.

References.

11 Ionospheric Propagation.

11.1 Introduction.

11.2 Dielectric Properties of an Ionized Medium.

11.3 Propagation in a Magnetoionic Medium.

11.4 Ionospheric Propagation Characteristics.

11.5 Ionospheric Sounding.

11.6 The Secant Law.

11.7 Transmission Curves.

11.8 Breit and Tuve's Theorem.

11.9 Martyn's Theorem on Equivalent Virtual Heights.

11.10 MUF, "Skip" Distance, and Ionospheric Signal Dispersion.

11.11 Earth Curvature Effects and Ray-Tracing Techniques.

11.12 Ionospheric Propagation Prediction Tools.

11.13 Ionospheric Absorption.

11.14 Ionospheric Effects on Earth-Space Links.

References.

12 Other Propagation Mechanisms and Applications.

12.1 Introduction.

12.2 Tropospheric Scatter.

12.3 Meteor Scatter.

12.4 Tropospheric Delay in Global Satellite Navigation Systems.

12.5 Propagation Effects on Radar Systems.

References.

Index.