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Radio Wave Propagation An Introduction for the Non-Specialist

:	John A. Richards
:	Radio Wave Propagation An Introduction for the Non-Specialist
:	Springer-Verlag
:	9783540771258
:	1
:	CHF 48.30
:

:	Elektronik, Elektrotechnik, Nachrichtentechnik
:	English

:	127
:	Wasserzeichen/DRM
:	PC/MAC/eReader/Tablet
:	PDF

This work treats the essential elements of radio wave propagation without requiring recourse to advanced electromagnetic concepts and equations. However, it provides sufficient detail to allow those concerned with wireless systems to acquire quickly a practical working knowledge of the important concepts. Radio wave propagation is placed in a practical context by considering the design aspects of communications systems at microwave frequencies. A fuller consideration of the electromagnetic properties of materials is given late in the book rather than as an introductory chapter.

	Preface	5
	Contents	7
	Chapter 1 Fundamental Concepts: Propagation in Free Space	10
	1.1 Free Space Versus Guided Propagation of RadioWaves	10
	1.2 The Concept of Power Density	10
	1.3 Electric and Magnetic Field Components	12
	1.4 Velocity of Propagation and Frequency-Wavelength Relationship	14
	1.5 Friis’ Radiation Formula	15
	1.6 Band Designation for RadioWaves	16
	1.7 RadioWave Propagation Near the Earth	17
	1.8 Allocating the Radio Spectrum	19
	Chapter 2 The SurfaceWave	22
	2.1 Ideal SurfaceWave Field Strength	22
	2.2 The Case of a Real Earth	23
	2.3 Incorporating Earth Curvature and Atmospheric Refraction	26
	2.4 Propagation at Very Low Frequencies	27
	Chapter 3 The Sky Wave	32
	3.1 The Ionosphere	32
	3.2 The Refractive Index of an Ionospheric Layer	35
	3.3 Refraction of a Radio Wave in the Ionosphere	36
	3.4 The Set of Critical Frequencies	39
	3.5 The Virtual Height of an Ionospheric Layer	40
	3.6 Maximum Usable Frequency and Skip Distance	44
	3.7 Range of the SkyWave	45
	Chapter 4 The Space Wave	48
	4.1 The Received Field Strength	48
	4.2 Effect of Earth Curvature on SpaceWave Propagation	52
	4.3 Diffraction	54
	4.4 Refraction of the SpaceWave	57
	4.5 Effect of Rainfall on SpaceWave Propagation	62
	4.6 Atmospheric Attenuation	63
	Chapter 5 Noise	66
	5.1 What is Noise?	66
	5.2 Sources of Noise	67
	5.2 Sources of Noise	67
	5.3 The Concept of Noise Temperature	68
	5.4 The Noise Temperature of a Two Port	68
	5.5 Noise Figure	70
	5.6 Relationship Between Noise Figure and Output Signal to Noise Ratio	70
	5.7 The Noise Properties of a Passive Two Port	71
	5.8 Cascaded Two Ports: Friis’ Noise Formula	72
	Chapter 6 Examples of Microwave Systems	77
	6.1 The Design of Open Microwave Repeater Systems	77
	6.2 Propagation Aspects of Satellite Communication Systems	83
	6.3 The Propagation Aspects of Cellular Radio	87
	6.4 Mobile Wireless Systems	89
	Chapter 7 The Effect of Materials on Propagation	94
	7.1 Background	94
	7.2 Propagation in Homogeneous Media	95
	7.3 Frequency Dependence of Material Properties	99
	7.4 Interactions with Ideal Interfaces	103
	7.5 Reflection from Rough Surfaces	106
	7.6 Transmission Through Media	108
	7.7 Propagation in Tunnels	109
	Appendix A A Simple Introduction to Antennas	113
	A.1 Introduction: Radiation Resistance and Radiation Patterns	113
	A.2 The Directivity and Gain of an Antenna	116
	A.3 The Aperture of an Antenna	118
	A.4 Radiated Fields	118
	A.5 Some Typical Antennas	121
	A.6 Baluns	123
	Appendix B The Use of Decibels in Communications Engineering	124
	Appendix C The Dielectric Constant of an Ionospheric Layer	126
	Index	130