Ham Radio Forum

You have an older television that you would like to connect to an antenna. Your television has a 75 ohm coaxial input and a 300 ohm twin lead input. Choose an antenna that would be mounted on the top of your house and a transmission line to connect the antenna to the television. Assume the antennas have an input impedance equal to their radiation resistance. The radiation resistance of some antennas are listed below. Assume the match between the antenna and the transmission line can have a Return Loss of 20 dB. Choose a standard type of transmission line (such as one of those listed below) to make any connections. If a matching network is needed between the transmission line and the antenna, design it using the Smith chart.
List:
a) your choice of antenna,
b) your choice of transmission line,
c) the design of your matching network (if needed),
d) and the VSWR (or return loss) seen at the antenna.
Antenna Design - Radiation Resistance
Half-wave dipole - 73 ohm
Quarter-wave monopole over a ground plane - 36.5 ohm
Folded Dipole - 300 ohm
Transmission line - characteristic impedance
Coaxial line - 50 ohm
Coxial line - 75 ohm
Twin lead (two wire) - 300 ohm.

Help is required as to what i choose ?

This looks like a school assignment. However, the obvious two best simple choices are:

1) Use a folded dipole antenna with 300-ohm twin-lead feed line connected to the 300-ohm antenna input on the receiver, because that wouldn't require any type of impedance matching device at either the antenna or the receiver, or alternatively

2) Use a half-wave dipole, 75-ohm coaxial cable connected to the 75-ohm antenna input on the receiver, because the impedance mismatch between a 73-ohm antenna and 75-ohm coaxial cable is negligible and no impedance matching device would therefore be required at either the antenna or receiver.

Kendall