Transmission Lines, Cables and Waveguides
DOI link for Transmission Lines, Cables and Waveguides
Transmission Lines, Cables and Waveguides book
Energy can be transmitted either through electromagnetic waves or it can be transmitted through conductors called transmission lines , cables and waveguides. A transmission line may be defined as a conductive method of sending electrical energy from one place to another. The strip line circuits are made using printed circuit board (PCB) methods. The special board materials are used which have low losses at microwave frequencies, examples are “woven fibre glass” and “polyoteflin”. The input impedence of an infinite length of a transmission line is known as its “Characteristic Impedence”. The combination of incident and reflected waves give rise to sinusoidal of power, these are called standing or non progressive waves of current and voltage. The transmission lines are used for transmission of power and information. A plastic cover over the line provides it protection against bad weather.