Search results with tag "Wave propagation"
Plane Waves and Wave Propagation - LSU
www.phys.lsu.eduallows, we shall also look at some of the more abstract aspects of wave propagation having to do with causality and signal propagation. 1 Plane Waves in Uniform Linear Isotropic Non-conducting Media 1.1 The Wave Equation One of the most important predictions of the Maxwell equations is the existence of electromagnetic waves which can transport ...
Earthquakes – Practice Questions and Answers revised ...
www.sci.sdsu.edu7. (b) contractions and expansions that are in the direction of wave propagation 8. (d) shearing motions that are at right angles to the direction of wave propagation 9. P-waves 10. S-waves 11. surface waves 12. (c) an ocean wave 13. snake-like 14. surface 15. (c) record the vibrations produced during an earthquake 16. delay 17. distance
Simple Derivation of Electromagnetic Waves from Maxwell’s ...
srjcstaff.santarosa.eduwave propagation (W/m2): 0 1 S E B. P u For a plane electromagnetic wave: 22 0 0 0 EB E cB S P P Pc. The time average of S over one or more cycles is called the wave intensity, I, which gives the very important result that the intensity of a light wave is proportional to the square of the amplitude of the electric or magnetic fields: 22 max max ...
Handbook on Ground Wave Propagation - ITU
www.itu.intpropagation curves for ground based antennas given in Recommendation ITU-R P.368. The associated program, for the prediction of ground wave field strength for both grounded and elevated antennas over a spherical smooth earth, GRWAVE, is available on the ITU-R Study Group 3 webpage.
Chapter 2: Radio Wave Propagation Fundamentals - KIT
www.ihe.kit.edu13 Institute of Radio Frequency Engineering and Electronics Snell’sLaw of Reflection 12.11.2018 Chapter 2: Radio Wave Propagation Fundamentals 1 2 i r t surface large compared to the wave length smooth surface (otherwise scattering) three angles: - incidence - reflection - transmission / refraction *full derivation in Arthur Schuster: “An Introduction to the Theory of Optics”
Small Satellite Link Budget Calculation
www.itu.intAntennas Polarization Propagation Rain, fog and clouds Cross polarization due to the rain The rain drop shape is elongated This implies that the rain can be considered as an isotropic media for the electromagnetic wave propagation. Crossing the wave through a rain area, a cross polarization e ect appears due to this e ect. Attenuation due to ...
Antennas & Propagation - Khoury College of Computer …
www.ccs.neu.eduLine-of-Sight Propagation Above 30 MHz neither ground nor sky wave propagation operates Transmitting and receiving antennas must be within line of sight oSatellite communication – signal above 30 MHz not reflected by ionosphere oGround communication – antennas within effective line of site due to refraction
Light Propagation in optical Fibres
people.brunel.ac.ukelectromagnetic field configurations. For monochromatic light fields of radian frequency ω, a mode travelling in the positive z direction has a time and z dependence given by •The factor β is the z component of the wave propagation constant k=2π/λ. For guided modes, βcan assume only certain discrete values. ej(ωt−βz)
5. PHYSICS OF SOUND - Pennsylvania State University
www.mne.psu.edu5.7 SPHERICAL WAVE PROPAGATION If we have a point sound source (the physical dimension of the source is much smaller than a wavelength), the sound pressure will be constant anywhere on a sphere surrounding the source. We also know from common sense that like light from a bulb, the sound pressure should diminish as we travel away from the source.
The Seismic Wave Equation - University of California, San ...
igppweb.ucsd.eduwave propagation in computer calculations by applying finite-difference techniques. In these methods, the stresses and displacements are computed at a series of grid points in the model, and the spatial and temporal derivatives are approximated through numerical differencing. The great advantage of finite-difference schemes is
CHAPTER 3 ANTENNA ARRAYS AND BEAMFORMING
vtechworks.lib.vt.eduThese aspects of array antennas are addressed as follows. The pattern of an array with general geometry and elements is derived in ... angles of wave propagation, so using the same phase shifts across the band causes the beam direction to vary with frequency. This effect is shown in Fig 3-3. ... radio. The matrix was optimized to obtain nearly ...