Chapter 1 Wave Propagation

• Principles Of Wave Motion
• Wave Motion In Water
• Figure 1-1.Formation Of Waves In Water
• Transverse Waves
• Medium
• Terms Used In Wave Motion
• Cycle
• Characteristics Of Wave Motion
• Figure 1-8.Longitudinal Wave Represented Graphically By A Transverse Wave
• Characteristics Of Wave Motion-Cont.
• Characteristics Of Wave Motion-Cont.
• Reflection
• Refraction
• Figure 1-10.Refraction Of A Wave
• Diffraction
• Sound Waves
• Requirements For Sound
• Characteristics Of Sound
• The Intensity Of Sound
• Sound Quality
• Elasticity And Density And Velocity Of Transmission
• Acoustics
• Interference
• Propagation Of Light
• Electromagnetic Theory Of Light
• Frequencies And Color
• Properties Of Light
• Figure 1-20.Transparent, Translucent, And Opaque Substances
• Reflection Of Light
• Diffusion Of Light
• Comparison Of Light Waves With Sound Waves
• Electromagnetic Spectrum
• The Basic Antenna
• Components Of The Electromagnetic Wave
• Electric Field
• Figure 1-26.Electric Fields Between Plates At Different Angles
• Magnetic Field
• Figure 1-28.Magnetic Fields Around Elements
• Combined Electric And Magnetic Fields
• Summary
• Longitudinal Wave
• Law Of Reflection
• Doppler Effect
• Primary Colors
• Answers To Questions Q1. Through Q48
• Answers To Questions Q1. Through Q48

Chapter 2 Radio Wave Propagation

• Electromagnetic Fields
• Figure 2-2.Phase Relationship Of Induction Field Components
• Radiation Fields
• Figure 2-3.Radiation From An Antenna
• Radio Waves
• Table 2-1.Radio Frequency Bands
• Wavelength-To-Frequency Conversions
• Wavelength-To-Frequency Conversions-Cont.
• Polarization
• Atmospheric Propagation
• Refraction
• Diffraction
• The Effect Of The Earth's Atmosphere On Radio Waves
• Radio Wave Transmission
• Surface Wave
• Space Wave
• Structure Of The Ionosphere
• Four Distinct Layers
• Refraction In The Ionosphere
• Density Of Layer
• Angle Of Incidence
• Figure 2-18.Effects Of Frequency On The Critical Angle
• Skip Distance/Skip Zone
• Absorption In The Ionosphere
• Fading
• Transmission Losses
• Ground Reflection Loss
• Control Of Emi
• Eleven-Year Sun Spot Cycle
• Sporadic E
• Frequency Selection Considerations
• Optimum Working Frequency
• Weather Versus Propagation
• Temperature Inversion
• Tropospheric Propagation
• Tropospheric Scattering
• Summary
• Vertically Polarized
• Troposphere
• Sky Waves
• Critical Frequency
• Skip Zone
• Multipath Fading
• Optimum Working Frequency (Fot)
• Answers To Questions Q1. Through Q48
• Answers To Questions Q1. Through Q48

Chapter 3 Principles Of Transmission Lines

• Terminology
• Two-Wire Open Line
• Shielded Pair
• Figure 3-6.Air Coaxial Line.
• Waveguides
• Losses In Transmission Lines
• Dielectric Losses
• Length Of A Transmission Line-Cont.
• Transmission Line Theory
• Distributed Constants
• Capacitance Of A Transmission Line
• Electromagnetic Fields About A Transmission Line
• Characteristic Impedance Of A Transmission Line
• Characteristic Impedance And The Infinite Line
• Characteristic Impedance And The Infinite Line-Cont.
• Figure 3-17.Termination Of A Line.
• Voltage Change Along A Transmission Line
• Ac Applied To A Transmission Line
• Dc Applied To An Infinite Line
• Ac Applied To An Infinite Line
• Figure 3-21.Ac Applied To An Equivalent Transmission Line.
• Figure 3-22.Instantaneous Voltages Along A Transmission Line
• Velocity Of Wave Propagation
• Figure 3-23.Dc Applied To An Equivalent Transmission Line
• Determining Characteristic Impedance
• Determining Characteristic Impedance-Cont.
• Reflection Of Dc Voltage From An Open Circuit
• Figure 3-24.Reflection From An Open-Ended Line.
• Reflection Of Dc Voltage From A Short Circuit
• Figure 3-25.Reflection From A Short-Circuited Line
• Reflection Of Ac Voltage From An Open Circuit
• Reflection Of Ac Voltage From An Open Circuit-Cont.
• Figure 3-27.Instantaneous Values Of Incident And Reflected Waves On An Open-Ended Line
• Figure 3-28.Conventional Picture Of Standing Waves
• Figure 3-29.Composite Results Of Instantaneous Waves
• Reflection Of Ac Voltage From A Short Circuit
• Terminating A Transmission Line
• Figure 3-31.Sending-End Impedance Of Various Lengths And Terminations
• Impedance For Various Lengths Of Open Lines
• Figure 3-32.Voltage, Current, And Impedance On Open Line
• Impedance Of Various Lengths Of Shorted Lines
• Standing Waves On A Transmission Line
• Termination In An Open Circuit
• Termination In Inductance
• Termination In A Resistance Less Than Z0
• Voltage Standing-Wave Ratio
• Summary
• Shielded Pair
• Copper Losses
• Leakage Current
• Characteristic Impedance, Z
• Short-Circuited
• Nonresonant
• Terminations
• Standing Wave Ratio
• Answers To Questions Q1. Through Q30
• Answers To Questions Q1. Through Q30

Chapter 4 Antennas

• Principles Of Antenna Radiation
• Figure 4-2.Typical Antenna System
• Current And Voltage Distribution On An Antenna
• Figure 4-4.Current And Voltage Distribution On An Antenna
• Radiation Of Electromagnetic Energy
• Figure 4-6.Standing Waves Of Voltage And Current On An Antenna
• Antenna Characteristics
• Polarization
• Polarization Requirements For Various Frequencies
• Advantages Of Vertical Polarization
• Radiation Resistance
• Isotropic Radiation
• Rectangular-Coordinate Pattern
• Anisotropic Radiation
• Figure 4-11.Anisotropic Radiator
• Antenna Loading
• Basic Antennas
• Radiation Patterns
• Radiation Pattern Of A Dipole
• Methods Of Feeding Energy To An Antenna
• Characteristics Of Quarter-Wave Antennas
• Figure 4-19.Groundscreen And Counterpoise
• Folded Dipole
• Array Antennas
• Phasing
• Stub Phasing
• Directivity
• Directional Arrays
• Radiation Pattern
• Broadside Arrays
• Gain And Directivity
• End-Fire Arrays
• Figure 4-29.Parallel Elements 180 Degrees Out Of Phase
• Parasitic Arrays
• Operation
• Figure 4-31.Patterns Obtained Using A Reflector With Proper Spacing
• Gain And Directivity
• Yagi Antennas
• Special Antennas
• Long-Wire Antenna
• Rhombic Antenna
• Advantages
• Disadvantages
• Turnstile Antenna
• Ground-Plane Antenna
• Rf Safety Precautions
• Figure 4-43.Examples Of Rf Radiation Warning Signs
• Precautions When Working Aloft
• Radiation Resistance
• Anisotropic Radiator
• Antenna Loading
• Quarter-Wave Antenna (Marconi)
• Folded Dipole
• End-Fire Array
• Parasitic Array
• Beverage Antennas
• Turnstile Antenna
• Answers To Questions Q1. Through Q48
• Answers To Questions Q1. Through Q48

Glossary

• Glossary
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• Glossary

Module 10  Index

• Module 10 Index
• Module 10 Index

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