Transmission Line - Avionics MCQ Questions

Explanation: an electrical transmission line can be modelled as a two-port network also called a quadripole.

Explanation: Ordinary electrical cables suffice to carry low frequency alternating current (AC) and audio signals.

Explanation: Transmission lines are used for purposes such as connecting radio transmitters and receivers with their antennas they are then called feed lines or feeders.

Explanation: A stripline circuit uses a flat strip of metal which is sandwiched between two parallel ground planes.

Explanation: The primary requirements of a transmission line are that the line introduces minimum attenuation, less noise to the signal and the line did not radiate any of the signals as radio energy. All transmission lines and connectors are designed with these requirements in mind.

Explanation: Cables used to carry RF energy are not simply resistive conductors but are complex equivalents of inductors, capacitors, and resistors. If simple resistive conductors are used then undesirable effects such as noise, power loss occurs.

Explanation: The sum of the complex impedance by the parallel wires, resistance of the wires and the shunt capacitance results in a transmission line that appears as a distributed low-pass filter consisting of series inductors and resistors and shunt capacitors and resistors. This is called a lumped model of a distributed line.

Explanation: A parallel transmission line is a two-wire balanced line in which insulating spacers have been used to keep the wires separated. Such lines are rarely used today. The spacing between the wires is maintained by a continuous plastic insulator.

Explanation: Twisted pairs are commonly used for terrestrial telephone communications.

Explanation: Twin-lead consists of a pair of conductors held apart by a continuous insulator