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A uniform plane wave at frequency f=100 MHz propagates in a material having conductivity o = 3.0 S/m and dielectric constant e_r' = 8.00.

  

A uniform plane wave at frequency f=100 MHz propagates in a material having conductivity o = 3.0 S/m and dielectric constant e_r' = 8.00. The wave carries an electric field amplitude E_0 = 100 V/m. (a) Calculate the loss tangent and determine whether the medium would qualify as a good dielectric or a good conductor. (b) Calculate a, B, and n. (c) Write the electric field in phasor form, assuming x polarization and forward z travel. (d) Write the magnetic field in phasor form. (e) Write the time-average Poynting vector, S. (f) Find the 6-dB material thickness at which the wave power drops to 25 % of its value on entry.

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