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

  1. Feb 2, 2010 #1
    1. The problem statement, all variables and given/known data
    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?

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


    3. 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.
     
  2. jcsd
  3. Feb 3, 2010 #2

    berkeman

    User Avatar

    Staff: Mentor

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

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

    .
     
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