Twin-Lead Cable is a flat cable comprises of two conducting wires each separated by insulating material of plastic or polyethylene. The name twin-lead is given to the wire because of copper leads inside the wire are equally alike using Copper or copper clad steel wires as the conductor of this cable. The twin-lead cable is used for the transmission of radio frequency (RF) signals, and the spacing in between them is of paramount importance. Because in the transmission of the radio signal, it is the distant spacing that actually keeps the signal moving through without any back reflection of the signal.
Characteristics of Twin-Lead Cable
1) The wire diameter and its spacing dictate the impedance of the twin-lead cable.
2) The most commonly used twin-lead cable is 300 ohms, using the wire of 20 or 22 gauge and about 7.5 inches apart.
3) Impedance matches correctly of the 300 ohms’ twin-lead cable with the folded dipole antenna.
4) Twin-lead cable has the lowest signal losses than coaxial cable if installed under similar conditions.
5) But twin-lead is more vulnerable to It is also more prone to get damaged by the weather and by its installed environment.
Practical Applications of Twin-Lead Cable
Practically Coaxial Cable is more secure and less prone to get damaged by the environmental hazards. But Twin-Lead Cable is a parallel conductor transmission line. Following are some of its practical applications.
FM Radio Transmission
It involves providing the connections of radio transmitters, receivers, and antennas. It is also used in the transmission of balanced radio frequency signals.
The Ladder line comprises of two insulated wires bound together at equal intervals just to hold the wires together and giving it a ladder appearance. Due to the spacing, it reduces the amount of dirt and moisture the wire is prone to get. So, it makes the wire more sustainable towards weather conditions.