ABSTRACT

At the end of this chapter you should be able to:

• appreciate the purpose of a transmission line

• define the transmission line primary constants R, L, C andG

• calculate phase delay, wavelength and velocity of propagation on a transmission line

• appreciate current and voltage relationships on a transmission line

• define the transmission line secondary line constants Z0, γ , α and β

• calculate coefficient in terms of the primary line constants

• understand and lines

• understand wave coefficient

• understand standing wave ratio

Atransmission line is a one point to another and energy can be sent. Thus distribution lines are

lines; in electronics, however, the term usually implies a line used for the transmission of radio-frequency (r.f.) energy such as that from a radio transmitter to the antenna. An important feature of a transmission line is that it

should guide energy from a source at the sending end to a load at the receiving end without loss by radiation.