(10) Wireless Communication and Brewster Angles: In a wireless communication link at a frequency of f = 1.5 GHz, the height of the transmitting antenna with respect to earth's surface is h, = 1 Km, and the horizontal distance between the transmitting and receiving antenna is d = 10 Km. The soil below the antenna is very dry, with parameters e, = 3.2 and o = 0. The transmitting antenna emits waves with parallel polarization, and in general, they travel to the receiving antenna either as a direct ray through air or as a reflected ray, bouncing off the earth's surface. Find the height of the receiving antenna, h , for which the reflected wave is eliminated, so that only the direct wave is received. Ans: 4.59 Km