'Ground wave' diaporamas de présentation

Amateur Extra License Class

Amateur Extra License Class. Chapter 10 Topics in Radio Propagation. HF Propagation. In nearly all cases, HF waves travel along the surface of the earth or they are returned to earth after encountering the upper layers of the ionosphere. HF Propagation.

844 views • 66 slides

Cumulative Radiated Emissions From Metallic Broadband Data Distribution Systems

Cumulative Radiated Emissions From Metallic Broadband Data Distribution Systems. Dr I D Flintoft Dr A D Papatsoris Dr D Welsh Prof A C Marvin York EMC Services Ltd. University of York. Scope. ionosphere. Sky Wave. 3-30 MHz. Space Wave. 0.1-30 MHz. Ground Wave. 0.1-3 MHz. London.

677 views • 55 slides

GWEN

GWEN. And Ground Wave Propagation. What is Ground Wave?. It is a mode of propagation generated only by vertical polarization. It is used exclusively by the broadcast industry for their transmissions. Radio waves remain in contact with the earth. VLF range is thousands of miles.

670 views • 43 slides

GWEN

GWEN. And Ground Wave Propagation. What is Ground Wave?. It is a mode of propagation generated only by vertical polarization. It is used exclusively by the broadcast industry for their transmissions. Radio waves remain in contact with the earth. VLF range is thousands of miles.

436 views • 43 slides

Class 3

Class 3. et198B. ET 198B Commercial and Amateur (Ham) Radio FCC license Preparation Course. Bill Croghan WB0KSW PG-15-6818. Radio Wave Propagation How it gets there. Radio waves travel by a number of methods. 1. Direct, i.e. line of sight 2. Ground wave 3. Sky wave

523 views • 40 slides

Chapter 2

Chapter 2. Radio Frequency Spectrum. Overview. Radio Frequencies RF Bands and Management RF Propagation Mixing of Frequencies Modulation. >>. Electromagnetic Frequencies. Electromagnetic spectrum Radio frequencies Visible light and Infrared Ultraviolet X-rays Gamma rays

515 views • 37 slides

Wave Propagation

Wave Propagation. Presented by: Bob Kenyon - K8LJ. CRES Amateur Radio Club 4/22/2008. Agenda. Introduction and background Basic propagation concepts Propagation software overview Modeling program examples Demo of W6ELProp and Ionoscope Open discussion & conclusion. ~ 30 mi.

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477 views • 23 slides

Very Low Frequency Astronomy

Very Low Frequency Astronomy. Or how to observe at work on a cloudy day!. The Radio Spectrum. The Ionosphere VLF are opaque to the ionosphere Therefore VLF Astronomy is by its nature an indirect method of observing. E Layer. D Layer. Quiet Sun.

501 views • 23 slides

General License Course Chapter 8

213 views • 21 slides

586 views • 20 slides

Space Communication

Space Communication. This Chapter includes: Space Communication Power Density, Attenuation Range of Electromagnetic Waves Ground Wave Propagation Sky Wave Propagation Space Wave Propagation TV Transmission and Height of TV Antenna Satellite Communication Remote Sensing Satellites.

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Antenna Zoning for the Broadcaster Society of Broadcast Engineers New England Ennes Workshop Marlboro, MA October 26, 20

Antenna Zoning for the Broadcaster Society of Broadcast Engineers New England Ennes Workshop Marlboro, MA October 26, 2004. Fred Hopengarten, Esq. www.antennazoning.com 781/259-0088 hopengarten@post.harvard.edu. Selected Topics. A new preemption for AM broadcasting!

245 views • 14 slides

Intermediate Course (6) Propagation Karl Davies

Intermediate Course (6) Propagation Karl Davies. East Kent Radio Society EKRS. v. f. l. Velocity of Propagation. Candidates should know the formula v = f x l . Try to remember another triangle formula. v is the speed of radio waves / light :- v = 300,000,000 m/s.

241 views • 12 slides

Chelmsford Amateur Radio Society Intermediate Course (6) Propagation

Chelmsford Amateur Radio Society Intermediate Course (6) Propagation. v. f. l. Velocity of Propagation. Candidates should know the formula v = f x l . Try to remember another triangle formula. v is the speed of radio waves / light :- v = 300,000,000 m/s. f is the frequency in Hz.

124 views • 12 slides