Field and Wave Electromagnetics 2nd Edition by David Cheng

Exercise 32

The magnetic field intensity of a linearly polarized uniform plane wave propagating in the + y-direction in seawater [ r = 80, r = 1, = 4 (S/m)] is
H = a x 0.1 sin (10 10 t - /3) (A/m) at y = 0.
a) Determine the attenuation constant, the phase constant, the intrinsic impedance,the phase velocity, the wavelength, and the skin depth.
b) Find the location at which the amplitude of H is 0.01 (A/m).
c) Write the expressions for E(y, t) and H(y, t) at y = 0.5 (m) as functions of t.