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Army Communication Systems Principles of Radio Wave PropagationPrinciples of Radio Wave PropagationSubcourse OverviewTable of ContentsLesson 1: Principles of Wave PropagationIntroductionRadio wave propagation.Figure 1-2. Elements of a wave.Figure 1-3. Comparison of waves with different amplitudesElectromagnetic spectrum. Figure 1-4. Electromagnetic spectrum.Figure 1-5. Simple radio communication system.Table 1-1. Radio frequency bands.Figure 1-6. Vertical and horizontal polarization.Figure 1-7. Wave shapes.Figure 1-8. Amplitude-modulated system.Behavior of radio waves in different media.Figure 1-10. Reflection and refraction of a light beam.Summary. Lesson 1 Practice ExerciseLesson 1 Practice Exercise-cont.Lesson 1 Practice Exercise Answer Key and FeedbackLesson 1 Practice Exercise Answer Key and Feedback-cont.Lesson 2: Principles of Ground Wave PropagationIntroductionFigure 2-1. Ground waves and sky waves.Figure 2-2. Layers of the Earth's atmosphere.Figure 2-3. Surface wave propagation.Table 2-1. Surface conductivity.Figure 2-4. Space wave propagation.Summary.Lesson 2 Practice ExerciseLesson 2 Practice Exercise-cont.Lesson 2 Practice Exercise Answer Key and FeedbackLesson 2 Practice Exercise Answer Key and Feedback-cont.Lesson 3: Principles of Sky Wave PropagationIntroductionIonosphere. Figure 3-1. Layers of the ionosphere.Figure 3-2. Effects of ionospheric density on radio wavesFigure 3-3. Frequency versus refraction and distanceFigure 3-5. Effect of frequency on the critical angle.Figure 3-7. Ray paths for a fixed frequency with varying angles of incidence.Obstacles to propagation.Variations in the ionosphere Summary. Summary-cont.Lesson 3 Practice ExerciseLesson 3 Practice Exercise-cont.Lesson 3 Practice Exercise Answer Key and FeedbackLesson 3 Practice Exercise Answer Key and Feedback-cont.Blank PageBlank PageBlank Page
Army Communication Systems
Principles of Radio Wave PropagationPrinciples of Radio Wave PropagationSubcourse OverviewTable of ContentsLesson 1: Principles of Wave PropagationIntroductionRadio wave propagation.Figure 1-2. Elements of a wave.Figure 1-3. Comparison of waves with different amplitudesElectromagnetic spectrum. Figure 1-4. Electromagnetic spectrum.Figure 1-5. Simple radio communication system.Table 1-1. Radio frequency bands.Figure 1-6. Vertical and horizontal polarization.Figure 1-7. Wave shapes.Figure 1-8. Amplitude-modulated system.Behavior of radio waves in different media.Figure 1-10. Reflection and refraction of a light beam.Summary. Lesson 1 Practice ExerciseLesson 1 Practice Exercise-cont.Lesson 1 Practice Exercise Answer Key and FeedbackLesson 1 Practice Exercise Answer Key and Feedback-cont.Lesson 2: Principles of Ground Wave PropagationIntroductionFigure 2-1. Ground waves and sky waves.Figure 2-2. Layers of the Earth's atmosphere.Figure 2-3. Surface wave propagation.Table 2-1. Surface conductivity.Figure 2-4. Space wave propagation.Summary.Lesson 2 Practice ExerciseLesson 2 Practice Exercise-cont.Lesson 2 Practice Exercise Answer Key and FeedbackLesson 2 Practice Exercise Answer Key and Feedback-cont.Lesson 3: Principles of Sky Wave PropagationIntroductionIonosphere. Figure 3-1. Layers of the ionosphere.Figure 3-2. Effects of ionospheric density on radio wavesFigure 3-3. Frequency versus refraction and distanceFigure 3-5. Effect of frequency on the critical angle.Figure 3-7. Ray paths for a fixed frequency with varying angles of incidence.Obstacles to propagation.Variations in the ionosphere Summary. Summary-cont.Lesson 3 Practice ExerciseLesson 3 Practice Exercise-cont.Lesson 3 Practice Exercise Answer Key and FeedbackLesson 3 Practice Exercise Answer Key and Feedback-cont.Blank PageBlank PageBlank Page
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