ABSTRACT
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
(41.1) 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
(41.2)
where ·
Y
is the shunt admittance per unit distance of the transmission line (S/m). Combining (41.1) and (41.2), the Telegrapher’s equation or Helmholtz’s wave equation for the trans-
mission line voltage is [1-3].
