ABSTRACT
The study of transmission lines is important in a variety of fields, from the performance of communication systems to signal integrity in printed circuit boards. Transmission lines are two or more uniform, parallel conductors able to transmit signals and power along their length. In this case, all time variations are gradual compared to the propagation delay, and understanding transmission lines is not an important factor in understanding system behavior. Transverse electromagnetic waves, in which the electrical and magnetic waves are perpendicular to the direction of propagation, are the principal type of electromagnetic wave that propagates along transmission lines. The ratio of magnetic flux to current is simply the self-inductance of the transmission line section and is not a function of time. The ratio of charge to voltage is simply the capacitance of the transmission line section and is not a function of time.
