DB loss for a 3GHZ EM wave traveling through 2 meters of a medium

AI Thread Summary
The discussion focuses on calculating the dB loss for a 3GHz electromagnetic wave traveling through a medium with a permittivity of 1.5ε₀ and a loss tangent of 9E-4 over a distance of 2 meters. Participants express uncertainty about the relevant equations and relationships needed for the calculation, with one individual initially estimating an incorrect loss value of approximately 6*10^6 dB. There is a mention of the wave number k being proportional to frequency and its relation to electromagnetic loss. A suggestion is made to refer to Wikipedia's page on Loss Tangent for further clarification. The conversation highlights the challenges in applying theoretical concepts to practical calculations in electromagnetic wave propagation.
KingNothing
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Homework Statement


What is the dB loss for a 3GHZ EM wave traveling through 2 meters of a medium with ϵ=1.5ϵ_0 and loss tangent = 9E-4?

Homework Equations


Umm...I'm actually not sure. I can't find anything really relating these things at all.


The Attempt at a Solution


My first attempt involved a decibel loss of about 6*10^6, so that can't be anywhere close to right. Every equation I see shows the wave number k being proportional to the frequency, and the EM loss being proportional to k.
 
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KingNothing said:

Homework Statement


What is the dB loss for a 3GHZ EM wave traveling through 2 meters of a medium with ϵ=1.5ϵ_0 and loss tangent = 9E-4?

Homework Equations


Umm...I'm actually not sure. I can't find anything really relating these things at all.


The Attempt at a Solution


My first attempt involved a decibel loss of about 6*10^6, so that can't be anywhere close to right. Every equation I see shows the wave number k being proportional to the frequency, and the EM loss being proportional to k.

I think wikipedia's page on Loss Tangent will help you out:

http://en.wikipedia.org/wiki/Loss_tangent

.
 

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