46 Microwave devices and components - conocimientos.com.ve

Microwave devices and components. Phase delay and propagation velocity. The propagation constant. Transmission line distortion. Wave reflection and the reflection. coefficient. Standing wave ratio. Fundamental waveguide characteristics. Microwave passive components. The directional coupler. Waveguide junctions. Cavity resonators. Circulators and isolators. Microwave active devices. Solid-state devices. Microwave tubes. Multicavity magnetrons.

domingo, 28 de noviembre de 2010

PROPAGATION CONSTANT

The propagation constant of an electromagnetic wave is a measure of the change undergone by the amplitude of the wave as it propagates in a given direction. The quantity being measured can be the voltage or current in a circuit or a field vector such as electric field strength or flux density. The propagation constant itself measures change per metre but is otherwise dimensionless.

The propagation constant is expressed logarithmically, almost universally to the base e, rather than the more usual base 10 used in telecommunications in other situations. The quantity measured, such as voltage, is expressed as a sinusiodal phasor. The phase of the sinusoid varies with distance which results in the propagation constant being a complex number, the imaginary part being caused by the phase change.

ELABORADO POR:

NERWIN ANTONIO MORA REINOSO

C.I: 17.557.095

CAF