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Army Communication Systems Fundamentals of Microwave CommunicationsFundamentals of Microwave CommunicationsGeneralGeneral (continued)Table of ContentsTable of Contents (Cont)IntroductionLesson 1. Fundamental of Radio CommunicationsFigure 1. Block Diagram of Basic Radio Set.Radio receiver.Figure 4. Block Diagram of Detector and RF Amplifier.Figure 6. Radiation of Radio Waves From a Vertical Antenna.Figure 7. Wavelength of a Radio Wave.Frequency bands.Learning Event 3: Methods of TransmissionAmplitude modulation (AM)Amplitude modulation (AM) (Cont)Figure 9. Waveshape.Frequency modulation (FM)Figure 10. Examples of Voice-Sound Wave.Practice ExercisePractice Exercise (Cont)Practice Exercise (Cont)Lesson 1. Fundamental of Radio CommunicationsLesson 2. Propagation of radio wavesRadiation.Figure 11. Components of Electromagnetic Wave.Learning Event 2: Microwave Multichannel Radio SystemsFigure 12. Typical Radio System.Radio frequency spectrum use by microwave multichannel radio.Figure 13. RF Spectrum Use by Microwave Multichannel Radio.Learning Event 3: Microwave Multichannel Radio AntennasFigure 14. Electromagnetic Wave Component.Antenna radiation patterns.Figure 15. Antenna Radiation Patterns.Figure 16. Example of a Direction Lobe.Antennas used in the VHF and UHF ranges.Figure 17. Parabolic Reflector Antennas.Polarization of antennas.Polarization effects over tropospheric scatter pathsPractice ExercisePractice Exercise (cont)Practice Exercise (cont)Lesson 2. Propagation of radio wavesLesson 3. System alignmentLearning Event 2: Noise and InterferenceInterference from natural sources.Some of the common conditions that cause mutual interferenceLearning Event 3: FadingMicrowave multichannel fading aspects.One percent microwave multichannel fading.Figure 18. Examples of Space Diversity.Space density.Figure 19. Space Diversity Antenna Arrangement.Frequency diversityPractice ExercisePractice Exercise (cont)Practice Exercise (cont)Lesson 3. System alignmentAnswers to Practice ExercisesAnswers to Practice Exercises (cont)Blank Page
Army Communication Systems
Fundamentals of Microwave CommunicationsFundamentals of Microwave CommunicationsGeneralGeneral (continued)Table of ContentsTable of Contents (Cont)IntroductionLesson 1. Fundamental of Radio CommunicationsFigure 1. Block Diagram of Basic Radio Set.Radio receiver.Figure 4. Block Diagram of Detector and RF Amplifier.Figure 6. Radiation of Radio Waves From a Vertical Antenna.Figure 7. Wavelength of a Radio Wave.Frequency bands.Learning Event 3: Methods of TransmissionAmplitude modulation (AM)Amplitude modulation (AM) (Cont)Figure 9. Waveshape.Frequency modulation (FM)Figure 10. Examples of Voice-Sound Wave.Practice ExercisePractice Exercise (Cont)Practice Exercise (Cont)Lesson 1. Fundamental of Radio CommunicationsLesson 2. Propagation of radio wavesRadiation.Figure 11. Components of Electromagnetic Wave.Learning Event 2: Microwave Multichannel Radio SystemsFigure 12. Typical Radio System.Radio frequency spectrum use by microwave multichannel radio.Figure 13. RF Spectrum Use by Microwave Multichannel Radio.Learning Event 3: Microwave Multichannel Radio AntennasFigure 14. Electromagnetic Wave Component.Antenna radiation patterns.Figure 15. Antenna Radiation Patterns.Figure 16. Example of a Direction Lobe.Antennas used in the VHF and UHF ranges.Figure 17. Parabolic Reflector Antennas.Polarization of antennas.Polarization effects over tropospheric scatter pathsPractice ExercisePractice Exercise (cont)Practice Exercise (cont)Lesson 2. Propagation of radio wavesLesson 3. System alignmentLearning Event 2: Noise and InterferenceInterference from natural sources.Some of the common conditions that cause mutual interferenceLearning Event 3: FadingMicrowave multichannel fading aspects.One percent microwave multichannel fading.Figure 18. Examples of Space Diversity.Space density.Figure 19. Space Diversity Antenna Arrangement.Frequency diversityPractice ExercisePractice Exercise (cont)Practice Exercise (cont)Lesson 3. System alignmentAnswers to Practice ExercisesAnswers to Practice Exercises (cont)Blank Page
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