ABSTRACT
Y are functions of the voltage, the current, and the location on the transmission line.
Ohm’s law of a transmission line, which is the amount of voltage drop on a transmission line per unit distance of voltage transmission is expressed as
(9.1) dV
dz IZ
˙ ˙ ˙ = − / ( )V m
where ·
V is the transmission line voltage (Volt), · I is the transmission line current (Ampere), Z is the series
impedance per unit length of the transmission line (Ω), and z is a one-dimensional coordinate placed in parallel to the transmission line (meter). The equation of current decrease per unit length is
(9.2)
where ·
Y is the shunt admittance per unit distance of the transmission line (S/m). Combining (9.1) and (9.2), the Telegrapher’s equation or Helmholtz’s wave equation for the trans-
mission line voltage is [1-3].
