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###### Arun posted an Question
December 28, 2021 • 22:09 pm 30 points
• IIT JAM
• Physics (PH)

# What is the attenaution constant and propogation constant ,what is its formula in the cinducting medium and in non dispersive medium.also is the magnitude of pr

what is the attenaution constant and propogation constant ,what is its formula in the cinducting medium and in non dispersive medium.Also is the magnitude of propogation vector equal to alpha+ iota times beta

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• ##### Isha lohan 1

Propagation constant is a measure of changes in a sinusoidal electromagnetic wave in terms of amplitude and phase, while propagating through a medium. This can be a transmission line or free space. The Propagation constant is a dimensionless quantity. YES It is equal to the, alpha + i * beta. Here, α = Attenuation constant, it causes the signal amplitude to decrease while propagating through a transmission line. It is always a positive number, if we get a negative attenuation constant that means we are violating the first law of thermodynamics. β = Phase constant, it is the imaginary component of the propagation constant. It gives us the phase of the signal along a transmission line, at a constant time. Ask if any further doubt. For details of this topic, you may refer to Griffith's book of Electrodynamics . There it is explained very deeply.

• ##### Isha lohan 1 Best Answer

Propagation constant is a measure of changes in a sinusoidal electromagnetic wave in terms of amplitude and phase, while propagating through a medium. This can be a transmission line or free space. The Propagation constant is a dimensionless quantity. YES It is equal to the, alpha + i * beta. Here, α = Attenuation constant, it causes the signal amplitude to decrease while propagating through a transmission line. It is always a positive number, if we get a negative attenuation constant that means we are violating the first law of thermodynamics. β = Phase constant, it is the imaginary component of the propagation constant. It gives us the phase of the signal along a transmission line, at a constant time. Ask if any further doubt. For details of this topic, you may refer to Griffith's book of Electrodynamics . There it is explained very deeply.

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