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Unformatted text preview: 23 Imperfect dielectrics, good conductors Condition   = 2 = 1 Perfect dielectric = 0 2 Imperfect dielectric 1 1 2 = 2 2 2 2 Good conductor 1 f f 45 2 f 1 f Perfect conductor =  The table above summarizes TEM wave parameters in homogeneous conducting media where the propagation velocity xpolarized phasor E = xE o e z e jz accompanied by H = y E o e z e jz . v p = (note that it can be frequency dependent) and field phasors can be expressed in formats similar to that shown in the margin, keeping in mind that propagation direction coincides with vector S E H * such that S = E H = 1 2 Re { S } is the average energy flux per unit area (timeaverage Poynting vector). 1 Example 1: Consider the plane TEM wave E = y 2 e z e jz V m , in an imperfect dielectric . Determine H and timeaverage Poynting vector S . Compute S at z = 0 and z = 10 m, if...
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 Spring '08
 Kim

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