2.40 A 100 MHz FM broadcast station uses a 300 2 transmission line between the transmitter and a tower-mounted half-wave dipole antenna. The antenna impedance is 73 2. You are

asked to design a quarter-wave transformer to match the antenna to the line, (a) Determine the electrical length and characteristic impedance of the quarter-wave section. (b) If the quarter-wave section is a two-wire line with D = 2.5 cm and the wires are embedded in polystyrene with & = 2.6, determine the physical length of the quarter-wave section and the radius of the two wire conductors.