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Some Fundamental Ideas
Waveguides with perfectly reflecting walls
Sources of waves
14 other sections not shown
amplitude assumed axis boundary conditions Budden chapter complex 0-plane constant phase contour curve decreases differential equation diffraction diffraction grating discussed distance earth earth's surface electromagnetic waves evanescent modes example excitation factor exponential expression field components free space function given gives ground group velocity height Hence Hertz vector Hertzian dipole horizontal impulse response increases ionosphere kc/s leaky modes line source locked modes low frequencies Maxwell's equations medium method mode condition mode points mode theory modified refractive index negative order parallel perfectly reflecting walls phase integral phase integral formula plane waves planes of constant point source poles positive pressure propagation radiated radio waves reflected wave reflection coefficient residue series sharply bounded shown in figure shows signal sin0 Snell's law solution sound waves steepest descents term TM modes transmitter travelling troposphere varying wave normal wave-guide mode wavelength x-z plane Zenneck wave zero order mode