329fall09hw9 - ECE 329 Homework 9 Due: THURSDAY, October...

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Unformatted text preview: ECE 329 Homework 9 Due: THURSDAY, October 29, 2009, 5 PM 1. A submarine submerged in the ocean (where = 4 S/m, r = 81 , and r = 1 ) wants to receive an electromagnetic signal from a ship located directly above it at the surface. If the ship is transmitting at 20 kHz, how close must the submarine be located in order to receive at least 0.1% of the transmitted signal amplitude? 2. In conducting media, plane TEM wave parameters and satisfy = j and = + j as well as = j = Re { } = 1 Im { } Use these relations to derive material and wave parameters for the following plane wave propagating in a non-magnetic material ( = ): H = x 10 e- y cos(8 10 6 t- 3 y- 3 ) A/m Determine: a) The propagation constant and intrinsic impedance b) The permittivity and conductivity c) Phasor H d) The corresponding phasor E e) The time averaged Poynting vector < E H > f) The time averaged power dissipated in a cubic volume bounded by the planes...
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329fall09hw9 - ECE 329 Homework 9 Due: THURSDAY, October...

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