Book description
Antennas and Wave Propagation is written for the first course on the same. The book begins with an introduction that discusses the fundamental concepts, notations, representation and principles that govern the field of antennas. A separate chapter on mathematical preliminaries is discussed followed by chapters on every aspect of antennas from Maxwell's equations to antenna array analysis, antenna array synthesis, antenna measurements and wave propagation.
Table of contents
- Cover
- Title page
- Brief Contents
- Contents
- Dedication
- Preface
- Introduction
-
Chapter 1. Mathematical Preliminaries
- 1.1 Fundamentals of Scalars and Vectors
- 1.2 Coordinate Systems
- 1.3 Del (∇) Operator
- 1.4 Gradient of a Scalar V (= ∇V)
- 1.5 Divergence of a Vector A (= ∇ . A)
- 1.6 Curl of a Vector (≡ ∇ × a)
- 1.7 Laplacian Operator (∇2)
- 1.8 Dirac Delta
- 1.9 Decibel and Neper Concepts
- 1.10 Complex Numbers
- 1.11 Logarithmic Series and Identities
- 1.12 Quadratic Equations
- 1.13 Cubic Equations
- 1.14 Determinants
- 1.15 Matrices
- 1.16 Factorial
- 1.17 Permutations
- 1.18 Combinations
- 1.19 Basic Series
- 1.20 Exponential Series
- 1.21 Sine and Cosine Series
- 1.22 Sinh and Cosh Series
- 1.23 Hyperbolic Functions
- 1.24 Sine, Cosine, Tan and Cot Functions
- 1.25 Some Special Functions
- 1.26 Partial Derivative
- 1.27 Some Differentiation Formulae
- 1.28 Some Useful Integration Formulae
- 1.29 Radian and Steradian
- 1.30 Integral Theorems
- Points to Remember
- Solved Problems
- Objective Questions
- Exerscise Problems
-
Chapter 2. Maxwell’s Equations and Electromagnetic Waves
- 2.1 Introduction
- 2.2 Equation of Continuity for Time-varying Fields
-
2.3 Maxwell’s Equations for Time-varying Fields
- 2.3.1 Meaning of Maxwell’s Equations
- 2.3.2 Conversion of Differential Form of Maxwell’s Equations to Integral Form
- 2.3.3 Maxwell’s Equations for Static Fields
- 2.3.4 Characteristics of Free Space
- 2.3.5 Maxwell’s Equation for Free Space
- 2.3.6 Maxwell’s Equations for Static Fields in Free Space
- 2.3.7 Proof of Maxwell’s Equations
- 2.4 Sinusoidal Time-varying Fields
- 2.5 Maxwell’s Equations in Phasor Form
- 2.6 Influence of Medium on the Fields
- 2.7 Summary of Maxwell’s Equations for Different Cases
- 2.8 Conditions at a Boundary Surface
- 2.9 Time-varying Potentials
- 2.10 Electromagnetic Waves
- 2.11 Applications of EM Waves
- 2.12 Wave Equations in Free Space
- 2.13 Wave Equations for a Conducting Medium
- 2.14 Uniform Plane Wave Equation
- 2.15 General Solution of Uniform Plane Wave Equation
- 2.16 Relation Between E and H in a Uniform Plane Wave
- 2.17 Wave Equations in Phasor Form
- 2.18 Wave Propagation in a Lossless Medium
- 2.19 Propagation Characteristics of EM Waves in Free Space
- 2.20 Propagation Characteristics of EM Wave in a Conducting Medium
- 2.21 Conductors and Dielectrics
- 2.22 Wave Propagation Characteristics in Good Dielectrics
- 2.22.1 Intrinsic or Characteristic Impedance of a General Medium, η
- 2.23 Wave Propagation Characteristics in Good Conductors
- 2.24 Depth of Penetration, δ (m)
- 2.25 Polarisation of a Wave
- 2.26 Direction Cosines of a Vector Field
- 2.27 Waves on a Perfect Conductor—Normal Incidence
- 2.28 Waves on Dielectric—Normal Incidence
- 2.29 Reflection of Wave from a Good Conductor with Oblique Incidence
- 2.30 Reflection of a Wave from a Dielectric with Oblique Incidence
- 2.31 Brewster Angle
- 2.32 Poynting Vector and Flow of Power
- 2.33 Complex Poynting Vector
- Points to Remember
- Solved Problems
- Objective Questions
- Exercise Problems
-
Chapter 3. Radiation and Antennas
- 3.1 Introduction
- 3.2 Definition of Antenna
- 3.3 Functions of Antennas
- 3.4 Network Theorems
- 3.5 Properties of Antenna
- 3.6 Antenna Parameters
- 3.7 Basic Antenna Elements
- 3.8 Radiation Mechanism
- 3.9 Radiation Fields of Alternating Current Element (or Oscillating Electric Dipole)
- 3.10 Radiated Power and Radiation Resistance of Current Element
- 3.11 Radiation, Induction and Electrostatic Fields
- 3.12 Hertzian Dipole
- 3.13 Different Current Distributions in Linear Antennas
- 3.14 Radiation from Half-wave Dipole
- 3.15 Radiation from Quarter-wave Monopole
- 3.16 Radiation Characteristics of Dipoles
- Points to Remember
- Solved Problems
- Objective Questions
- Exercise Problems
-
Chapter 4. Analysis of Linear Arrays
- 4.1 Introduction
- 4.2 Directional Characteristics of Dipole Antennas
- 4.3 Radiation Pattern of Alternating Current Element
- 4.4 Radiation Pattern Expressions of Centre-fed Vertical Dipoles of Finite Length
- 4.5 Radiation Patterns of Centre-fed Vertical Dipoles
- 4.6 Radiation Patterns of Centre-fed Horizontal Dipoles of Finite Length
- 4.7 Radiation Patterns of Vertical Monopoles
- 4.8 Two-element Uniform Array
- 4.9 Uniform Linear Arrays
- 4.10 Field Strength of a Uniform Linear Array
- 4.11 First Side Lobe Ratio (SLR)
- 4.12 Broadside and End-fire Arrays
- 4.13 Patterns of Array of Non-isotropic Radiators
- 4.14 Multiplication of Patterns
- 4.15 Generalised Expression of Principle of Pattern Multiplication
- 4.16 Radiation Pattern Characteristics
- 4.17 Binomial Arrays
- 4.18 Effect of Earth on Vertical Patterns
- 4.19 Effect of Earth on Radiation Resistance
- 4.20 Methods of Excitation of Antennas
- 4.21 Impedance Matching Techniques
- 4.22 Transmission Loss between Transmitting and Receiving Antennas (Friis Formula)
- 4.23 Antenna Temperature and Signal-to-noise Ratio
- Points to Remember
- Solved Problems
- Objective Questions
- Exercise Problems
-
Chapter 5. Array Synthesis
- 5.1 Introduction
- 5.2 Synthesis Methods
- 5.3 Schelkunoff Polynomial Method
- 5.4 Fourier Transform Method
- 5.5 Line Source Design by Fourier Transform Method
- 5.6 Design of Linear Array by Fourier Transform Method
- 5.7 Linear Array Design by Woodward-Lawson Method
- 5.8 Dolph-Chebychev Method (Tschebyscheff Distribution)
- 5.9 Determination of Dolph-Chebychev Amplitude Distribution
- 5.10 Advantages of Dolph-Tschebyscheff Method
- 5.11 Taylor’s Method
- 5.12 Laplace Transform Method
- 5.13 Standard Amplitude Distributions
- Points to Remember
- Solved Problems
- Objective Questions
- Exercise Problems
-
Chapter 6. HF, VHF and UHF Antennas
- 6.1 Introduction
- 6.2 Isotropic Radiators
- 6.3 Directional Antennas
- 6.4 Omni-directional Antenna
- 6.5 Resonant Antennas
- 6.6 Non-resonant Antennas (Travelling Wave Antennas)
- 6.7 LF Antennas
- 6.8 Antennas for HF, VHF, UHF
- 6.9 Dipole Arrays
- 6.10 Broadside Array
- 6.11 End-fire Array
- 6.12 Folded Dipole
- 6.13 V-Antenna
- 6.14 Inverted V-Antenna
- 6.15 Rhombic Antenna
- 6.16 Yagi-Uda Antenna
- 6.17 Log-periodic Antennas
- 6.18 Loop Antenna
- 6.19 Helical Antenna
- 6.20 Whip Antenna
- 6.21 Ferrite Rod Antenna
- 6.22 Turnstile Antenna
- 6.23 Discone Antenna
- 6.24 Notch Antenna
- Points to Remember
- Solved Problems
- Objective Questions
- Exercise Problems
-
Chapter 7. Microwave Antennas
- 7.1 Introduction
- 7.2 Rod Reflector
- 7.3 Plane Reflector
- 7.4 Corner Reflector
- 7.5 Parabolic Reflector
- 7.6 Types of Parabolic Reflectors
- 7.7 Feed Systems for Parabolic Reflectors
- 7.8 Shaped Beam Antennas
- 7.9 Horn Antenna
- 7.10 Corrugated Horns
- 7.11 Slot Antenna
- 7.12 Impedance of Slot Antenna
- 7.13 Impedance of a Few Typical Dipoles
- 7.14 Slots in the Walls of Rectangular Waveguide
- 7.15 Babinet’s Principle
- 7.16 The Method of Moment (MOM)
- 7.17 Lens Antenna
- 7.17.1 Types of Lens Antennas
- 7.18 Equation of the Shape of Lens
- 7.19 Microstrip or Patch Antennas
- Points to Remember
- Solved Problems
- Objective Questions
- Exercise Problems
-
Chapter 8. Antenna Measurements
- 8.1 Introduction
- 8.2 Drawbacks in Measurements of Antenna Parameters
- 8.3 Methods to Overcome Drawbacks in Measurements
- 8.4 Some Methods for Accurate Measurements
- 8.5 Measurement Ranges
- 8.6 Differences between Indoor and Outdoor Ranges
- 8.7 Antenna Impedance Measurement
- 8.8 Measurement of Antenna Pattern
- 8.9 Measurement of Radiation Resistance of an Antenna
- 8.10 Gain Measurement by Two Antenna Method
- 8.11 Gain Measurement by Three Antenna Method
- 8.12 Gain Measurement by Reflection from Ground
- 8.13 Directivity Measurement
- 8.14 Measurement of Antenna Beam Width
- 8.15 Measurement of Side Lobe Ratio (SLR)
- 8.16 Measurement of Radiation Efficiency
- 8.17 Measurement of Antenna Aperture Efficiency, ηa
- 8.18 Measurement of Polarisation of Antenna
- 8.19 Phase Measurement
- Points to Remember
- Objective Questions
-
Chapter 9. Wave Propagation
- 9.1 Propagation Characteristics of EM Wave
- 9.2 Factors Involved in the Propagation of Radio Waves
- 9.3 Ground Wave
- 9.4 Ground Wave Field Strength
- 9.5 Ground Wave Field Strength by Maxwell’s Equations
- 9.6 Reflection of Radio Waves by the Surface of the Earth
- 9.7 Roughness of Earth
- 9.8 Reflection Factors of Earth
- 9.9 Wave Tilt of the Ground Wave
- 9.10 Space Wave or Tropospheric Wave Propagation
- 9.11 Field Strength due to Space Wave
- 9.12 Considerations in Space Wave Propagation
- 9.13 Atmospheric Effects in Space Wave Propagation
- 9.14 Duct Propagation
- 9.15 Radio Horizon
- 9.16 Troposcatter
- 9.17 Fading of EM Waves in Troposphere
- 9.18 Line of Sight (LOS)
- 9.19 Ionospheric Wave Propagation
- 9.20 Characteristics of Ionosphere
- 9.21 Refractive Index of Ionosphere
- 9.22 Phase and Group Velocities
- 9.23 Mechanism of Ionospheric Propagation—Reflection and Refraction
- 9.24 Characteristic Parameters of Ionospheric Propagation
- 9.25 Sky Wave Field Strength
- 9.26 Fading and Diversity Techniques
- 9.27 Faraday Rotation
- 9.28 Ionospheric Abnormalities
- 9.29 Ionospheric Storms
- 9.30 Sudden Ionospheric Disturbances (SID)
- 9.31 Sun Spot Cycle
- 9.32 Whistlers
- 9.33 Tides and Winds in the Ionosphere
- 9.34 Effect of Earth’s Magnetic Field
- Points to Remember
- Solved Problems
- Objective Questions
- Exercise Problems
- Multiple Choice Questions
- Bibliography
- Acknowledgements
- Copyright
Product information
- Title: Antennas and Wave Propagation
- Author(s):
- Release date: September 2004
- Publisher(s): Pearson India
- ISBN: 9788131701843
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