Question

A dipole antenna, with a triangular current distribution, is used for communication with sub- marines at a frequency of 150 kHz. The overall length of the dipole is 200 m, and its radius is I m. Assume a loss resistance of 2 ohms in of the antenna including the loss resistance. The input reac- tance can be approximated by tan(xl/l) (b) Evaluate the radiation efficiency of the antenna. c) Evaluate the radiation power factor of the antenna. (d) Design a conjugate-matching network to provide a perfect match between the antenna and a 50-ohm transmission line. Give the value of the series reactance X and the turns ratio n of the ideal transformer. (e) Assuming a conjugate match, evaluate the instantaneous 2:1 VSWR bandwidth of the antenna