2.83. = A resonant, lossless (ecd 1.0) half-wavelength dipole antenna, having a direc- tivity of 2.156 dB, has an input impedance of 73 ohms and is connected to a lossless, 50 ohms transmission line. A wave, having the same polarization as the antenna, is incident upon the antenna with a power density of 5 W/m² at a frequency of 10 MHz. Find the received power available at the end of the transmission line.