12 Facts About Transmission line

In electrical engineering, a transmission line is a specialized cable or other structure designed to conduct electromagnetic waves in a contained manner.

Dielectric loss is caused when the insulating material inside the transmission line absorbs energy from the alternating electric field and converts it to heat .

The transmission line is modelled with a resistance and inductance in series with a capacitance and conductance in parallel.

Total loss of power in a transmission line is often specified in decibels per metre, and usually depends on the frequency of the signal.

Transmission line model is an example of the distributed-element model.

Characteristic impedance of a transmission line is the ratio of the amplitude of a single voltage wave to its current wave.

Consequently, the velocity factor of the material the transmission line is made of needs to be taken into account when doing such a calculation.

Case where the length of the Transmission line is one quarter wavelength long, or an odd multiple of a quarter wavelength long, the input impedance becomes.

StripTransmission line circuit uses a flat strip of metal which is sandwiched between two parallel ground planes.

Balanced line is a transmission line consisting of two conductors of the same type, and equal impedance to ground and other circuits.

Characteristic impedance of each transmission line segment is often different from the impedance of the fourth, input cable, the impedance transformation circle is off-centred along the axis of the Smith Chart whose impedance representation is usually normalized against.

One method recommended in the RSGB's radiocommunication handbook is to take an open-circuited length of transmission line wired in parallel with the feeder delivering signals from an aerial.