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Wave power dissipation

  1. Mar 16, 2015 #1
    Hello
    Here is a problem of Pozar's Book(mircowave).
    3138618200_1426493850.jpg
    and here is solution:
    9209475200_1426493850.jpg
    my problem is I don't know how he obtain -40.6 because
    |T|^2 (T is Reflection Coefficient ) is return power and 1-|T|^2 is transfer powe but 10log none of them return -40.6 , what does -40.6 and how can calculate it?

     
  2. jcsd
  3. Mar 16, 2015 #2

    RUber

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    ##| \Gamma|^2 = .999956^2 + .0000435^2 ##
    ## 1 - | \Gamma|^2 = 8.7996e-005##
    ## 10 log_{10} (8.7996e-005) = -40.6 ##
    Perhaps it was the modulus of the complex number that threw you off? Or was it the base10 log?
     
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