A 1000 Hz uniform electromagnetic plane wave is propagating downward into the seawater in the x-direction. The y-z plane

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A 1000 Hz Uniform Electromagnetic Plane Wave Is Propagating Downward Into The Seawater In The X Direction The Y Z Plane 1 (98.93 KiB) Viewed 37 times

A 1000 Hz uniform electromagnetic plane wave is propagating downward into the seawater in the x-direction. The y-z plane, at which x = 0, denotes the sea surface such as shown in Figure Q.6(b). The wave is polarized in the y-direction. Using seawater constants for conductivity, relative permittivity and relative permeability as 4 S/m, 80 and 1 respectively, and assuming the initial amplitude of the ♬ field at x = 0 as 100 mA/m, (i) Determine the value of a, ß, n and 0₁. (ii) (iii) (4 marks) Write down the time-harmonic wave equations for the E and H field components of the wave. 200 m Determine the time-average power density carried by the wave. (2 marks) (iv) Calculate the total time-average power intercepted by an antenna with an effective area of 2 m² aboard a submarine located at a depth of x = 200 m. (2 marks) x=0 Sea surface (3 marks) Figure Q.6(b) Z X